长桌tabularray

Question 1

长桌`tabularray`

\documentclass{article}
\usepackage{tabularray}
\usepackage{amsmath}
\begin{document}
\begin{tblr}
[
long,
caption={Results of the DCC-GARCH model for stock market indices},
label={xxxxx}
]
{
colspec={lcccc},
cell{1}{2}={c=4}{c},
hline{1,Z}={1}{-}{0.05em},
hline{1,Z}={2}{-}{0.05em},
hline{2}={2-Z}{0.05em},
hline{3,21}={0.05em},
}
                     & Outcome    &             &            &                             \\
                     & (Estimate) & (Std.error) & (t value)  & ($\operatorname{Pr}(>|t|$)) \\
GDAXI.mu             & 0.000000   & 0.000821    & 0.000000   & 1.000000                    \\
GDAXI.omega          & 0.000000   & 0.000003    & 0.048846   & 0.961042                    \\
GDAXI.alpha1         & 0.050730   & 0.012555    & 4.040571   & 0.000053                    \\
GDAXI.beta1          & 0.900100   & 0.032728    & 27.502568  & 0.000000                    \\
FCHI.mu              & 0.000000   & 0.000813    & 0.000000   & 1.000000                    \\
FCHI.omega           & 0.000000   & 0.000004    & 0.031265   & 0.975058                    \\
FCHI.alpha1          & 0.051329   & 0.016720    & 3.069932   & 0.002141                    \\
FCHI.beta1           & 0.900178   & 0.039227    & 22.948028  & 0.000000                    \\
FTAS.mu              & 0.000000   & 0.000818    & 0.000000   & 1.000000                    \\
FTAS.omega           & 0.000000   & 0.000003    & 0.077804   & 0.937984                    \\
FTAS.alpha1          & 0.051058   & 0.011707    & 4.361314   & 0.000013                    \\
FTAS.beta1           & 0.900120   & 0.028077    & 32.058802  & 0.000000                    \\
SSMI.mu              & 0.000000   & 0.000686    & 0.000000   & 1.000000                    \\
SSMI.omega           & 0.000000   & 0.000002    & 0.049328   & 0.960658                    \\
SSMI.alpha1          & 0.051473   & 0.007339    & 7.013881   & 0.000000                    \\
SSMI.beta1           & 0.900169   & 0.017583    & 51.196838  & 0.000000                    \\
dcca1                & 0.023229   & 0.003674    & 6.322145   & 0.000000                    \\
dccb1                & 0.957464   & 0.006762    & 141.590704 & 0.000000                    \\
Information Criteria &            &             &            &                             \\
Akaike               & -24.205    &             &            &                             \\
Bayes                & -24.055    &             &            &                             \\
Shibata              & -24.207    &             &            &                             \\
Hannan-Quinn         & -24.147    &             &            &                             \\
Elapsed time:        & 4.92738    &             &            &                             \\
\end{tblr}
\end{document}

浮动表与`tabularray`

\documentclass{article}
\usepackage{tabularray}
\usepackage{amsmath}
\begin{document}
\begin{table}
\caption{Results of the DCC-GARCH model for stock market indices}
\label{xxxxx}
\centering
\begin{tblr}
{
colspec={lcccc},
cell{1}{2}={c=4}{c},
hline{1,Z}={1}{-}{0.05em},
hline{1,Z}={2}{-}{0.05em},
hline{2}={2-Z}{0.05em},
hline{3,21}={0.05em},
}
                     & Outcome    &             &            &                             \\
                     & (Estimate) & (Std.error) & (t value)  & ($\operatorname{Pr}(>|t|$)) \\
GDAXI.mu             & 0.000000   & 0.000821    & 0.000000   & 1.000000                    \\
GDAXI.omega          & 0.000000   & 0.000003    & 0.048846   & 0.961042                    \\
GDAXI.alpha1         & 0.050730   & 0.012555    & 4.040571   & 0.000053                    \\
GDAXI.beta1          & 0.900100   & 0.032728    & 27.502568  & 0.000000                    \\
FCHI.mu              & 0.000000   & 0.000813    & 0.000000   & 1.000000                    \\
FCHI.omega           & 0.000000   & 0.000004    & 0.031265   & 0.975058                    \\
FCHI.alpha1          & 0.051329   & 0.016720    & 3.069932   & 0.002141                    \\
FCHI.beta1           & 0.900178   & 0.039227    & 22.948028  & 0.000000                    \\
FTAS.mu              & 0.000000   & 0.000818    & 0.000000   & 1.000000                    \\
FTAS.omega           & 0.000000   & 0.000003    & 0.077804   & 0.937984                    \\
FTAS.alpha1          & 0.051058   & 0.011707    & 4.361314   & 0.000013                    \\
FTAS.beta1           & 0.900120   & 0.028077    & 32.058802  & 0.000000                    \\
SSMI.mu              & 0.000000   & 0.000686    & 0.000000   & 1.000000                    \\
SSMI.omega           & 0.000000   & 0.000002    & 0.049328   & 0.960658                    \\
SSMI.alpha1          & 0.051473   & 0.007339    & 7.013881   & 0.000000                    \\
SSMI.beta1           & 0.900169   & 0.017583    & 51.196838  & 0.000000                    \\
dcca1                & 0.023229   & 0.003674    & 6.322145   & 0.000000                    \\
dccb1                & 0.957464   & 0.006762    & 141.590704 & 0.000000                    \\
Information Criteria &            &             &            &                             \\
Akaike               & -24.205    &             &            &                             \\
Bayes                & -24.055    &             &            &                             \\
Shibata              & -24.207    &             &            &                             \\
Hannan-Quinn         & -24.147    &             &            &                             \\
Elapsed time:        & 4.92738    &             &            &                             \\
\end{tblr}
\end{table}
\end{document}

\documentclass{article}
\pagestyle{empty}
\usepackage{showframe}
\usepackage{tabularray}
\usepackage[margin=1cm]{geometry}
\begin{document}
\begin{table}
\caption{Regression Results for the period from 2006 to 2008}
\label{xxxxxxxx}
\centering
\begin{tblr}
{
colspec={Q[l,m]*{4}{Q[c,m]}},
cell{1,2,Z}{2}={c=4}{c},
cell{even[4-37]}{1}={r=2}{},
hline{1,Z}={1}{-}{0.05em},
hline{1,Z}={2}{-}{0.05em},
hline{2}={2-Z}{0.05em},
hline{even[4-37]}={2-Z}{0.05em},
hline{4,38,Y}={0.05em},
row{1}={font=\itshape},
cell{1}{Z}={font=\itshape},
rowsep=1pt
}
                                  & Dependent variable:                              &                  &                  &                  \\
                                  & y                                                &                  &                  &                  \\
                                  & (GDAXI)                                          & (FCHI)           & (FTAS)           & (SSMI)           \\
GDAXI.l1                          & $-$0.355$^{***}$                                 & 0.084$^{**}$     & 0.118$^{**}$     & 0.038            \\
                                  & (0.037)                                          & (0.035)          & (0.047)          & (0.032)          \\
FCHI.l1                           & 0.076$^{*}$                                      & $-$0.099$^{***}$ & 0.130$^{***}$    & $-$0.111$^{***}$ \\
                                  & (0.039)                                          & (0.036)          & (0.049)          & (0.033)          \\
FTAS.l1                           & 0.201$^{***}$                                    & $-$0.001         & $-$0.099$^{***}$ & 0.037            \\
                                  & (0.029)                                          & (0.027)          & (0.037)          & (0.025)          \\
SSMI.l1                           & 0.219$^{***}$                                    & $-$0.053         & $-$0.124$^{**}$  & $-$0.173$^{***}$ \\
                                  & (0.043)                                          & (0.040)          & (0.055)          & (0.037)          \\
GDAXI.l2                          & $-$0.245$^{***}$                                 & 0.007            & 0.004            & 0.075$^{**}$     \\
                                  & (0.036)                                          & (0.033)          & (0.045)          & (0.030)          \\
FCHI.l2                           & $-$0.038                                         & $-$0.142$^{***}$ & 0.047            & $-$0.065$^{***}$ \\
                                  & (0.028)                                          & (0.026)          & (0.035)          & (0.024)          \\
FTAS.l2                           & 0.312$^{***}$                                    & 0.100$^{***}$    & $-$0.111$^{***}$ & 0.634$^{***}$    \\
                                  & (0.031)                                          & (0.028)          & (0.039)          & (0.026)          \\
SSMI.l2                           & 0.144$^{***}$                                    & $-$0.032         & $-$0.041         & $-$0.143$^{***}$ \\
                                  & (0.043)                                          & (0.040)          & (0.055)          & (0.037)          \\
GDAXI.l3                          & $-$0.096$^{***}$                                 & 0.618$^{***}$    & 0.076$^{*}$      & 0.182$^{***}$    \\
                                  & (0.034)                                          & (0.032)          & (0.043)          & (0.029)          \\
FCHI.l3                           & 0.041                                            & $-$0.139$^{***}$ & $-$0.032         & 0.028            \\
                                  & (0.028)                                          & (0.026)          & (0.036)          & (0.024)          \\
FTAS.l3                           & 0.565$^{***}$                                    & 0.063            & $-$0.067         & 0.236$^{***}$    \\
                                  & (0.042)                                          & (0.039)          & (0.053)          & (0.036)          \\
SSMI.l3                           & 0.097$^{**}$                                     & $-$0.082$^{**}$  & $-$0.064         & $-$0.035         \\
                                  & (0.038)                                          & (0.035)          & (0.048)          & (0.032)          \\
GDAXI.l4                          & $-$0.120$^{***}$                                 & 0.052            & $-$0.037         & 0.013            \\
                                  & (0.043)                                          & (0.040)          & (0.054)          & (0.037)          \\
FCHI.l4                           & 0.017                                            & $-$0.037         & 0.084$^{**}$     & 0.023            \\
                                  & (0.028)                                          & (0.026)          & (0.036)          & (0.024)          \\
FTAS.l4                           & 0.175$^{***}$                                    & 0.065            & 0.055            & 0.123$^{***}$    \\
                                  & (0.045)                                          & (0.042)          & (0.057)          & (0.038)          \\
SSMI.l4                           & 0.002                                            & 0.300$^{***}$    & $-$0.150$^{***}$ & $-$0.059$^{*}$   \\
                                  & (0.037)                                          & (0.034)          & (0.046)          & (0.031)          \\
const                             & 0.0004                                           & $-$0.0005        & $-$0.0005        & $-$0.0001        \\
                                  & (0.0004)                                         & (0.0004)         & (0.001)          & (0.0004)         \\
Observations                      & 739                                              & 739              & 739              & 739              \\
R$^{2}$                           & 0.460                                            & 0.582            & 0.093            & 0.548            \\
Adjusted R$^{2}$                  & 0.448                                            & 0.573            & 0.073            & 0.538            \\
{Residual Std. Error\\(df = 722)} & 0.012                                            & 0.011            & 0.015            & 0.010            \\
{F Statistic\\(df = 16; 722)}     & 38.403$^{***}$                                   & 62.938$^{***}$   & 4.627$^{***}$    & 54.680$^{***}$   \\
Note:                             & $^{*}$p$<$0.1; $^{**}$p$<$0.05; $^{***}$p$<$0.01 &                  &                  &                  \\
\end{tblr}
\end{table}
\end{document}

Answer

长桌`tabularray`

\documentclass{article}
\usepackage{tabularray}
\usepackage{amsmath}
\begin{document}
\begin{tblr}
[
long,
caption={Results of the DCC-GARCH model for stock market indices},
label={xxxxx}
]
{
colspec={lcccc},
cell{1}{2}={c=4}{c},
hline{1,Z}={1}{-}{0.05em},
hline{1,Z}={2}{-}{0.05em},
hline{2}={2-Z}{0.05em},
hline{3,21}={0.05em},
}
                     & Outcome    &             &            &                             \\
                     & (Estimate) & (Std.error) & (t value)  & ($\operatorname{Pr}(>|t|$)) \\
GDAXI.mu             & 0.000000   & 0.000821    & 0.000000   & 1.000000                    \\
GDAXI.omega          & 0.000000   & 0.000003    & 0.048846   & 0.961042                    \\
GDAXI.alpha1         & 0.050730   & 0.012555    & 4.040571   & 0.000053                    \\
GDAXI.beta1          & 0.900100   & 0.032728    & 27.502568  & 0.000000                    \\
FCHI.mu              & 0.000000   & 0.000813    & 0.000000   & 1.000000                    \\
FCHI.omega           & 0.000000   & 0.000004    & 0.031265   & 0.975058                    \\
FCHI.alpha1          & 0.051329   & 0.016720    & 3.069932   & 0.002141                    \\
FCHI.beta1           & 0.900178   & 0.039227    & 22.948028  & 0.000000                    \\
FTAS.mu              & 0.000000   & 0.000818    & 0.000000   & 1.000000                    \\
FTAS.omega           & 0.000000   & 0.000003    & 0.077804   & 0.937984                    \\
FTAS.alpha1          & 0.051058   & 0.011707    & 4.361314   & 0.000013                    \\
FTAS.beta1           & 0.900120   & 0.028077    & 32.058802  & 0.000000                    \\
SSMI.mu              & 0.000000   & 0.000686    & 0.000000   & 1.000000                    \\
SSMI.omega           & 0.000000   & 0.000002    & 0.049328   & 0.960658                    \\
SSMI.alpha1          & 0.051473   & 0.007339    & 7.013881   & 0.000000                    \\
SSMI.beta1           & 0.900169   & 0.017583    & 51.196838  & 0.000000                    \\
dcca1                & 0.023229   & 0.003674    & 6.322145   & 0.000000                    \\
dccb1                & 0.957464   & 0.006762    & 141.590704 & 0.000000                    \\
Information Criteria &            &             &            &                             \\
Akaike               & -24.205    &             &            &                             \\
Bayes                & -24.055    &             &            &                             \\
Shibata              & -24.207    &             &            &                             \\
Hannan-Quinn         & -24.147    &             &            &                             \\
Elapsed time:        & 4.92738    &             &            &                             \\
\end{tblr}
\end{document}

浮动表与`tabularray`

\documentclass{article}
\usepackage{tabularray}
\usepackage{amsmath}
\begin{document}
\begin{table}
\caption{Results of the DCC-GARCH model for stock market indices}
\label{xxxxx}
\centering
\begin{tblr}
{
colspec={lcccc},
cell{1}{2}={c=4}{c},
hline{1,Z}={1}{-}{0.05em},
hline{1,Z}={2}{-}{0.05em},
hline{2}={2-Z}{0.05em},
hline{3,21}={0.05em},
}
                     & Outcome    &             &            &                             \\
                     & (Estimate) & (Std.error) & (t value)  & ($\operatorname{Pr}(>|t|$)) \\
GDAXI.mu             & 0.000000   & 0.000821    & 0.000000   & 1.000000                    \\
GDAXI.omega          & 0.000000   & 0.000003    & 0.048846   & 0.961042                    \\
GDAXI.alpha1         & 0.050730   & 0.012555    & 4.040571   & 0.000053                    \\
GDAXI.beta1          & 0.900100   & 0.032728    & 27.502568  & 0.000000                    \\
FCHI.mu              & 0.000000   & 0.000813    & 0.000000   & 1.000000                    \\
FCHI.omega           & 0.000000   & 0.000004    & 0.031265   & 0.975058                    \\
FCHI.alpha1          & 0.051329   & 0.016720    & 3.069932   & 0.002141                    \\
FCHI.beta1           & 0.900178   & 0.039227    & 22.948028  & 0.000000                    \\
FTAS.mu              & 0.000000   & 0.000818    & 0.000000   & 1.000000                    \\
FTAS.omega           & 0.000000   & 0.000003    & 0.077804   & 0.937984                    \\
FTAS.alpha1          & 0.051058   & 0.011707    & 4.361314   & 0.000013                    \\
FTAS.beta1           & 0.900120   & 0.028077    & 32.058802  & 0.000000                    \\
SSMI.mu              & 0.000000   & 0.000686    & 0.000000   & 1.000000                    \\
SSMI.omega           & 0.000000   & 0.000002    & 0.049328   & 0.960658                    \\
SSMI.alpha1          & 0.051473   & 0.007339    & 7.013881   & 0.000000                    \\
SSMI.beta1           & 0.900169   & 0.017583    & 51.196838  & 0.000000                    \\
dcca1                & 0.023229   & 0.003674    & 6.322145   & 0.000000                    \\
dccb1                & 0.957464   & 0.006762    & 141.590704 & 0.000000                    \\
Information Criteria &            &             &            &                             \\
Akaike               & -24.205    &             &            &                             \\
Bayes                & -24.055    &             &            &                             \\
Shibata              & -24.207    &             &            &                             \\
Hannan-Quinn         & -24.147    &             &            &                             \\
Elapsed time:        & 4.92738    &             &            &                             \\
\end{tblr}
\end{table}
\end{document}

\documentclass{article}
\pagestyle{empty}
\usepackage{showframe}
\usepackage{tabularray}
\usepackage[margin=1cm]{geometry}
\begin{document}
\begin{table}
\caption{Regression Results for the period from 2006 to 2008}
\label{xxxxxxxx}
\centering
\begin{tblr}
{
colspec={Q[l,m]*{4}{Q[c,m]}},
cell{1,2,Z}{2}={c=4}{c},
cell{even[4-37]}{1}={r=2}{},
hline{1,Z}={1}{-}{0.05em},
hline{1,Z}={2}{-}{0.05em},
hline{2}={2-Z}{0.05em},
hline{even[4-37]}={2-Z}{0.05em},
hline{4,38,Y}={0.05em},
row{1}={font=\itshape},
cell{1}{Z}={font=\itshape},
rowsep=1pt
}
                                  & Dependent variable:                              &                  &                  &                  \\
                                  & y                                                &                  &                  &                  \\
                                  & (GDAXI)                                          & (FCHI)           & (FTAS)           & (SSMI)           \\
GDAXI.l1                          & $-$0.355$^{***}$                                 & 0.084$^{**}$     & 0.118$^{**}$     & 0.038            \\
                                  & (0.037)                                          & (0.035)          & (0.047)          & (0.032)          \\
FCHI.l1                           & 0.076$^{*}$                                      & $-$0.099$^{***}$ & 0.130$^{***}$    & $-$0.111$^{***}$ \\
                                  & (0.039)                                          & (0.036)          & (0.049)          & (0.033)          \\
FTAS.l1                           & 0.201$^{***}$                                    & $-$0.001         & $-$0.099$^{***}$ & 0.037            \\
                                  & (0.029)                                          & (0.027)          & (0.037)          & (0.025)          \\
SSMI.l1                           & 0.219$^{***}$                                    & $-$0.053         & $-$0.124$^{**}$  & $-$0.173$^{***}$ \\
                                  & (0.043)                                          & (0.040)          & (0.055)          & (0.037)          \\
GDAXI.l2                          & $-$0.245$^{***}$                                 & 0.007            & 0.004            & 0.075$^{**}$     \\
                                  & (0.036)                                          & (0.033)          & (0.045)          & (0.030)          \\
FCHI.l2                           & $-$0.038                                         & $-$0.142$^{***}$ & 0.047            & $-$0.065$^{***}$ \\
                                  & (0.028)                                          & (0.026)          & (0.035)          & (0.024)          \\
FTAS.l2                           & 0.312$^{***}$                                    & 0.100$^{***}$    & $-$0.111$^{***}$ & 0.634$^{***}$    \\
                                  & (0.031)                                          & (0.028)          & (0.039)          & (0.026)          \\
SSMI.l2                           & 0.144$^{***}$                                    & $-$0.032         & $-$0.041         & $-$0.143$^{***}$ \\
                                  & (0.043)                                          & (0.040)          & (0.055)          & (0.037)          \\
GDAXI.l3                          & $-$0.096$^{***}$                                 & 0.618$^{***}$    & 0.076$^{*}$      & 0.182$^{***}$    \\
                                  & (0.034)                                          & (0.032)          & (0.043)          & (0.029)          \\
FCHI.l3                           & 0.041                                            & $-$0.139$^{***}$ & $-$0.032         & 0.028            \\
                                  & (0.028)                                          & (0.026)          & (0.036)          & (0.024)          \\
FTAS.l3                           & 0.565$^{***}$                                    & 0.063            & $-$0.067         & 0.236$^{***}$    \\
                                  & (0.042)                                          & (0.039)          & (0.053)          & (0.036)          \\
SSMI.l3                           & 0.097$^{**}$                                     & $-$0.082$^{**}$  & $-$0.064         & $-$0.035         \\
                                  & (0.038)                                          & (0.035)          & (0.048)          & (0.032)          \\
GDAXI.l4                          & $-$0.120$^{***}$                                 & 0.052            & $-$0.037         & 0.013            \\
                                  & (0.043)                                          & (0.040)          & (0.054)          & (0.037)          \\
FCHI.l4                           & 0.017                                            & $-$0.037         & 0.084$^{**}$     & 0.023            \\
                                  & (0.028)                                          & (0.026)          & (0.036)          & (0.024)          \\
FTAS.l4                           & 0.175$^{***}$                                    & 0.065            & 0.055            & 0.123$^{***}$    \\
                                  & (0.045)                                          & (0.042)          & (0.057)          & (0.038)          \\
SSMI.l4                           & 0.002                                            & 0.300$^{***}$    & $-$0.150$^{***}$ & $-$0.059$^{*}$   \\
                                  & (0.037)                                          & (0.034)          & (0.046)          & (0.031)          \\
const                             & 0.0004                                           & $-$0.0005        & $-$0.0005        & $-$0.0001        \\
                                  & (0.0004)                                         & (0.0004)         & (0.001)          & (0.0004)         \\
Observations                      & 739                                              & 739              & 739              & 739              \\
R$^{2}$                           & 0.460                                            & 0.582            & 0.093            & 0.548            \\
Adjusted R$^{2}$                  & 0.448                                            & 0.573            & 0.073            & 0.538            \\
{Residual Std. Error\\(df = 722)} & 0.012                                            & 0.011            & 0.015            & 0.010            \\
{F Statistic\\(df = 16; 722)}     & 38.403$^{***}$                                   & 62.938$^{***}$   & 4.627$^{***}$    & 54.680$^{***}$   \\
Note:                             & $^{*}$p$<$0.1; $^{**}$p$<$0.05; $^{***}$p$<$0.01 &                  &                  &                  \\
\end{tblr}
\end{table}
\end{document}

Question 2

使用tabularray包。我扩展了您的代码片段

序言，其中是加载geometry和 tabularray包。后者是添加的库booktabs和siunitx，
表格中的行被视为注释行，其中括号内为数字，
对于数字使用si列
对于水平线使用以下规则booktabs

完成并更改后，您的表格仍然可以浮动在一页中table：

\documentclass{article}
\usepackage[vmargin=25mm]{geometry}
%---------------- show page layout. don't use in a real document!
\usepackage{showframe}
\renewcommand\ShowFrameLinethickness{0.15pt}
\renewcommand*\ShowFrameColor{\color{red}}
%---------------------------------------------------------------%
\usepackage[skip=0.33\baselineskip,
            font=small,
            labelfont=bf]{caption}
\usepackage{tabularray}
\UseTblrLibrary{booktabs,
                siunitx}
\ExplSyntaxOn
\NewChildSelector{eachtwo}%
  {
    \int_step_inline:nnnn {5}{2}{\l_tblr_childs_total_tl}
      { \clist_put_right:Nn \l_tblr_childs_clist {##1} }
  }
\ExplSyntaxOff


\begin{document}
    \begin{table}[ht]
\caption{Results of the DCC-GARCH model for stock market indices}
\label{tab:results?}
\sisetup{table-format=3.6,
         input-open-uncertainty=,
         input-close-uncertainty=,
         table-align-text-after=false,
         table-align-text-before=false
        }
\begin{tblr}{colspec = {@{} l *{4}{X[c,si]} @{}},
                 row{1}   = {font=\itshape},
                 row{1,2} = {guard},
                 row{3-Z} = {rowsep=0pt},
             row{eachtwo} = {abovesep=1ex},
             }
    \toprule
    & \SetCell[c=4]{c}  Outcome 
            &           &           &           &               \\
    \cmidrule{2-5}
            &(Estimate) &(Std.error)&($t$ value)& $(\Pr(>|t|))$ \\
    \midrule
GDAXI.mu    & 0.000000  & 0.000821  & 0.000000  & 1.000000      \\
            & (0.037)   & (0.035)   & (0.047)   & (0.032)   \\
GDAXI.omega & 0.000000  & 0.000003  & 0.048846  & 0.961042      \\
            & (0.039)   & (0.036)   & (0.049)   & (0.033)   \\
GDAXI.alpha1& 0.050730  & 0.012555  & 4.040571  & 0.000053      \\
            & (0.029)   & (0.027)   & (0.037)   & (0.025)   \\
GDAXI.beta1 & 0.900100  & 0.032728  & 27.502568 & 0.000000      \\
            & (0.043)   & (0.040)   & (0.055)   & (0.037)   \\
FCHI.mu     & 0.000000  & 0.000813  & 0.000000  & 1.000000      \\
            & (0.036)   & (0.033)   & (0.045)   & (0.030)   \\
FCHI.omega  & 0.000000  & 0.000004  & 0.031265  & 0.975058      \\
            & (0.028)   & (0.026)   & (0.035)   & (0.024)   \\
FCHI.alpha1 & 0.051329  & 0.016720  & 3.069932  & 0.002141      \\
            & (0.031)   & (0.028)   & (0.039)   & (0.026)   \\
FCHI.beta1  & 0.900178  & 0.039227  & 22.948028 & 0.000000      \\
            & (0.043)   & (0.040)   & (0.055)   & (0.037)   \\
FTAS.mu     & 0.000000  &  0.000818 & 0.000000  & 1.000000      \\
            & (0.034)   & (0.032)   & (0.043)   & (0.029)   \\
FTAS.omega  & 0.000000  &  0.000003 & 0.077804  & 0.937984      \\
            & (0.028)   & (0.026)   & (0.036)   & (0.024)   \\
FTAS.alpha1 & 0.051058  & 0.011707  &  4.361314 & 0.000013      \\
            & (0.042)   & (0.039)   & (0.053)   & (0.036)   \\
FTAS.beta1  & 0.900120  & 0.028077  & 32.058802 & 0.000000      \\
            & (0.038)   & (0.035)   & (0.048)   & (0.032)   \\
SSMI.mu     & 0.000000  & 0.000686  & 0.000000  & 1.000000      \\
            & (0.043)   & (0.040)   & (0.054)   & (0.037)   \\
SSMI.omega  & 0.000000  & 0.000002  & 0.049328  & 0.960658      \\
            & (0.028)   & (0.026)   & (0.036)   & (0.024)   \\
SSMI.alpha1 & 0.051473  & 0.007339  & 7.013881  & 0.000000      \\
            & (0.045)   & (0.042)   & (0.057)   & (0.038)   \\
SSMI.beta1  & 0.900169  & 0.017583  & 51.196838 & 0.000000      \\
            & (0.037)   & (0.034)   & (0.046)   & (0.031)   \\
dcca1       & 0.023229  & 0.003674  & 6.322145  & 0.000000      \\
            & (0.0004)  & (0.0004)  & (0.001)   & (0.0004)  \\
dccb1       & 0.957464  & 0.006762  &141.590704 & 0.000000      \\
            & (0.0004)  & (0.0004)  & (0.001)   & (0.0004) \\
    \midrule
\SetCell[c=2]{l}    Information Criteria:
            &           &           &           &               \\[1ex]
Akaike      & -24.205   &           &           &               \\
Bayes       & -24.055   &           &           &               \\
Shibata     & -24.207   &           &           &               \\
Hannan-Quinn 
            & -24.147   &           &           &               \\
Elapsed time:  
            & 4.92738   &           &           &               \\
\bottomrule
\end{tblr}
\end{table}
\end{document}

（红线表示页面布局）

Answer

使用tabularray包。我扩展了您的代码片段

序言，其中是加载geometry和 tabularray包。后者是添加的库booktabs和siunitx，
表格中的行被视为注释行，其中括号内为数字，
对于数字使用si列
对于水平线使用以下规则booktabs

完成并更改后，您的表格仍然可以浮动在一页中table：

\documentclass{article}
\usepackage[vmargin=25mm]{geometry}
%---------------- show page layout. don't use in a real document!
\usepackage{showframe}
\renewcommand\ShowFrameLinethickness{0.15pt}
\renewcommand*\ShowFrameColor{\color{red}}
%---------------------------------------------------------------%
\usepackage[skip=0.33\baselineskip,
            font=small,
            labelfont=bf]{caption}
\usepackage{tabularray}
\UseTblrLibrary{booktabs,
                siunitx}
\ExplSyntaxOn
\NewChildSelector{eachtwo}%
  {
    \int_step_inline:nnnn {5}{2}{\l_tblr_childs_total_tl}
      { \clist_put_right:Nn \l_tblr_childs_clist {##1} }
  }
\ExplSyntaxOff


\begin{document}
    \begin{table}[ht]
\caption{Results of the DCC-GARCH model for stock market indices}
\label{tab:results?}
\sisetup{table-format=3.6,
         input-open-uncertainty=,
         input-close-uncertainty=,
         table-align-text-after=false,
         table-align-text-before=false
        }
\begin{tblr}{colspec = {@{} l *{4}{X[c,si]} @{}},
                 row{1}   = {font=\itshape},
                 row{1,2} = {guard},
                 row{3-Z} = {rowsep=0pt},
             row{eachtwo} = {abovesep=1ex},
             }
    \toprule
    & \SetCell[c=4]{c}  Outcome 
            &           &           &           &               \\
    \cmidrule{2-5}
            &(Estimate) &(Std.error)&($t$ value)& $(\Pr(>|t|))$ \\
    \midrule
GDAXI.mu    & 0.000000  & 0.000821  & 0.000000  & 1.000000      \\
            & (0.037)   & (0.035)   & (0.047)   & (0.032)   \\
GDAXI.omega & 0.000000  & 0.000003  & 0.048846  & 0.961042      \\
            & (0.039)   & (0.036)   & (0.049)   & (0.033)   \\
GDAXI.alpha1& 0.050730  & 0.012555  & 4.040571  & 0.000053      \\
            & (0.029)   & (0.027)   & (0.037)   & (0.025)   \\
GDAXI.beta1 & 0.900100  & 0.032728  & 27.502568 & 0.000000      \\
            & (0.043)   & (0.040)   & (0.055)   & (0.037)   \\
FCHI.mu     & 0.000000  & 0.000813  & 0.000000  & 1.000000      \\
            & (0.036)   & (0.033)   & (0.045)   & (0.030)   \\
FCHI.omega  & 0.000000  & 0.000004  & 0.031265  & 0.975058      \\
            & (0.028)   & (0.026)   & (0.035)   & (0.024)   \\
FCHI.alpha1 & 0.051329  & 0.016720  & 3.069932  & 0.002141      \\
            & (0.031)   & (0.028)   & (0.039)   & (0.026)   \\
FCHI.beta1  & 0.900178  & 0.039227  & 22.948028 & 0.000000      \\
            & (0.043)   & (0.040)   & (0.055)   & (0.037)   \\
FTAS.mu     & 0.000000  &  0.000818 & 0.000000  & 1.000000      \\
            & (0.034)   & (0.032)   & (0.043)   & (0.029)   \\
FTAS.omega  & 0.000000  &  0.000003 & 0.077804  & 0.937984      \\
            & (0.028)   & (0.026)   & (0.036)   & (0.024)   \\
FTAS.alpha1 & 0.051058  & 0.011707  &  4.361314 & 0.000013      \\
            & (0.042)   & (0.039)   & (0.053)   & (0.036)   \\
FTAS.beta1  & 0.900120  & 0.028077  & 32.058802 & 0.000000      \\
            & (0.038)   & (0.035)   & (0.048)   & (0.032)   \\
SSMI.mu     & 0.000000  & 0.000686  & 0.000000  & 1.000000      \\
            & (0.043)   & (0.040)   & (0.054)   & (0.037)   \\
SSMI.omega  & 0.000000  & 0.000002  & 0.049328  & 0.960658      \\
            & (0.028)   & (0.026)   & (0.036)   & (0.024)   \\
SSMI.alpha1 & 0.051473  & 0.007339  & 7.013881  & 0.000000      \\
            & (0.045)   & (0.042)   & (0.057)   & (0.038)   \\
SSMI.beta1  & 0.900169  & 0.017583  & 51.196838 & 0.000000      \\
            & (0.037)   & (0.034)   & (0.046)   & (0.031)   \\
dcca1       & 0.023229  & 0.003674  & 6.322145  & 0.000000      \\
            & (0.0004)  & (0.0004)  & (0.001)   & (0.0004)  \\
dccb1       & 0.957464  & 0.006762  &141.590704 & 0.000000      \\
            & (0.0004)  & (0.0004)  & (0.001)   & (0.0004) \\
    \midrule
\SetCell[c=2]{l}    Information Criteria:
            &           &           &           &               \\[1ex]
Akaike      & -24.205   &           &           &               \\
Bayes       & -24.055   &           &           &               \\
Shibata     & -24.207   &           &           &               \\
Hannan-Quinn 
            & -24.147   &           &           &               \\
Elapsed time:  
            & 4.92738   &           &           &               \\
\bottomrule
\end{tblr}
\end{table}
\end{document}

（红线表示页面布局）

Question 3

要将table/tabular设置转换为longtable设置，同时使表格具有更开放和吸引人的“外观”，我建议您至少遵循以下五个步骤：

执行
```
\usepackage{longtable,booktabs}
```
在序言中。

替换代码块

\begin{table}[!htbp] \centering 
\caption{Results of the DCC-GARCH model for stock market indices} 
\label{} 
\begin{tabular}{@{\extracolsep{5pt}}lcccc} 
\\[-1.5ex]\hline 
\hline \\[-1.5ex] 
& \multicolumn{4}{c}{\textit{Outcome}} \\ 
\cline{2-5} 
\\[-1.5ex] & \multicolumn{4}{c}{} \\ 
\\[-1.5ex] & (Estimate) & (Std.error) & (t value) & (\operatorname{Pr}(>|t|))\\ 
\hline \\[-1.5ex]

和

\begin{longtable}{@{} l cccc @{}}

%% headers and footers

\caption{Results of the DCC-GARCH model for stock market indices} 
\label{tab_dccgarch} \\ 
\toprule
& \multicolumn{4}{c@{}}{\textit{Outcome}} \\ 
\cmidrule(l){2-5} 
& (Estimate) & (Std.error) & ($t$-value) & ($\mathrm{Pr}>|t|$)\\ 
\midrule
\endfirsthead

\multicolumn{5}{@{}l}{Table \thetable, continued} \\[0.5ex} 
\toprule
& \multicolumn{4}{c@{}}{\textit{Outcome}} \\ 
\cmidrule(l){2-5} 
& (Estimate) & (Std.error) & ($t$-value) & ($\mathrm{Pr}>|t|$)\\ 
\midrule
\endhead

\midrule
\multicolumn{5}{r@{}}{\footnotesize(Cont'd on following page)}\\
\endfoot

\bottomrule
\endlastfoot

代替

\hline \\[-1.5ex] 
Information Criteria &  & &  &  \\
  & & & & \\

和

\midrule
\multicolumn{5}{@{}l}{Information Criteria} \\

删除或只是注释掉所有
```
 & & & & \\ 
```
線。

代替

\hline 
\hline \\[-1.5ex] 
\end{tabular} 
\end{table}

和

\end{longtable}

为了让桌子更有吸引力，我还会圆形的将所有数字保留为三位小数。这可以借助包S提供的列类型轻松完成siunitx。

\documentclass{article}

\usepackage[margin=2.5cm]{geometry} % set page parameters suitably
\usepackage{longtable,booktabs}
\setlength\LTcapwidth{\textwidth}
\usepackage{siunitx}
%% column type for automatic rounding to three digits:
\newcolumntype{T}[1]{S[table-format=#1,round-mode=places,round-precision=3]}

\begin{document}

\begin{longtable}{@{} l T{-2.3} T{1.3} T{3.3} T{1.3} @{}}

%% headers and footers

\caption{Results of DCC-GARCH model for stock market indices} 
\label{tab_dccgarch} \\ 
\toprule
& \multicolumn{4}{c@{}}{Outcome} \\ 
\cmidrule(l){2-5} 
& {Coeff.} & {Std err} & {$t$-value} & {$\mathrm{Pr}>|t|$} \\ 
\midrule
\endfirsthead

\multicolumn{5}{@{}l}{Table \thetable, continued} \\[0.5ex]
\toprule
& \multicolumn{4}{c@{}}{\textit{Outcome}} \\ 
\cmidrule(l){2-5} 
& {Coeff.} & {Std err} & {$t$-value} & {$\mathrm{Pr}>|t|$} \\ 
\midrule
\endhead

\midrule
\multicolumn{5}{r@{}}{\footnotesize(Cont'd on following page)}\\
\endfoot

\bottomrule
\endlastfoot

%% body of table

 GDAXI.mu & 0.000000 & 0.000821& 0.000000& 1.000000 \\ 
  %& (0.037) & (0.035) & (0.047) & (0.032) \\ 
\addlinespace
 GDAXI.omega & 0.000000 & 0.000003 & 0.048846 & 0.961042 \\ 
  %& (0.039) & (0.036) & (0.049) & (0.033) \\ 
\addlinespace
 GDAXI.alpha1 & 0.050730& 0.012555 & 4.040571& 0.000053 \\ 
 % & (0.029) & (0.027) & (0.037) & (0.025) \\ 
\addlinespace
 GDAXI.beta1 & 0.900100 & 0.032728& 27.502568 & 0.000000 \\ 
 % & (0.043) & (0.040) & (0.055) & (0.037) \\ 
\addlinespace
 FCHI.mu & 0.000000 & 0.000813 & 0.000000 & 1.000000 \\ 
  %& (0.036) & (0.033) & (0.045) & (0.030) \\ 
\addlinespace
 FCHI.omega & 0.000000 & 0.000004 & 0.031265 & 0.975058 \\ 
 % & (0.028) & (0.026) & (0.035) & (0.024) \\ 
\addlinespace
 FCHI.alpha1 & 0.051329 & 0.016720 & 3.069932 & 0.002141\\ 
 % & (0.031) & (0.028) & (0.039) & (0.026) \\ 
\addlinespace
 FCHI.beta1 &0.900178 & 0.039227& 22.948028 & 0.000000 \\ 
  %& (0.043) & (0.040) & (0.055) & (0.037) \\ 
\addlinespace
 FTAS.mu & 0.000000 &  0.000818 & 0.000000 & 1.000000\\ 
  %& (0.034) & (0.032) & (0.043) & (0.029) \\ 
\addlinespace
 FTAS.omega & 0.000000 &  0.000003  & 0.077804 & 0.937984 \\ 
 % & (0.028) & (0.026) & (0.036) & (0.024) \\ 
\addlinespace
 FTAS.alpha1 & 0.051058 & 0.011707 &  4.361314 & 0.000013 \\ 
  %& (0.042) & (0.039) & (0.053) & (0.036) \\ 
\addlinespace
 FTAS.beta1& 0.900120 & 0.028077 & 32.058802 & 0.000000\\ 
  %& (0.038) & (0.035) & (0.048) & (0.032) \\ 
\addlinespace
 SSMI.mu & 0.000000 & 0.000686 & 0.000000 &1.000000 \\ 
  %& (0.043) & (0.040) & (0.054) & (0.037) \\ 
\addlinespace
 SSMI.omega & 0.000000 & 0.000002 & 0.049328 & 0.960658 \\ 
 % & (0.028) & (0.026) & (0.036) & (0.024) \\ 
\addlinespace
 SSMI.alpha1 & 0.051473 &0.007339 & 7.013881&  0.000000\\ 
  %& (0.045) & (0.042) & (0.057) & (0.038) \\ 
\addlinespace
 SSMI.beta1 &0.900169 & 0.017583 & 51.196838 & 0.000000 \\ 
  %& (0.037) & (0.034) & (0.046) & (0.031) \\ 
\addlinespace
 dcca1 & 0.023229 & 0.003674 & 6.322145 & 0.000000 \\ 
  %& (0.0004) & (0.0004) & (0.001) & (0.0004) \\ 
\addlinespace
 dccb1 & 0.957464 & 0.006762 & 141.590704 & 0.000000\\ 
  %& (0.0004) & (0.0004) & (0.001) & (0.0004) \\ 
\midrule
\multicolumn{5}{@{}l}{Information Criteria} \\
Akaike        & -24.205 &  &  &  \\ 
Bayes         & -24.055 &  &  &  \\ 
Shibata       & -24.207 &  &  &  \\ 
Hannan-Quinn  & -24.147 &  &  & \\[2mm]
Elapsed time: & 4.92738 &  &  &  \\ 

\end{longtable}
\end{document}

Answer

要将table/tabular设置转换为longtable设置，同时使表格具有更开放和吸引人的“外观”，我建议您至少遵循以下五个步骤：

执行
```
\usepackage{longtable,booktabs}
```
在序言中。

替换代码块

\begin{table}[!htbp] \centering 
\caption{Results of the DCC-GARCH model for stock market indices} 
\label{} 
\begin{tabular}{@{\extracolsep{5pt}}lcccc} 
\\[-1.5ex]\hline 
\hline \\[-1.5ex] 
& \multicolumn{4}{c}{\textit{Outcome}} \\ 
\cline{2-5} 
\\[-1.5ex] & \multicolumn{4}{c}{} \\ 
\\[-1.5ex] & (Estimate) & (Std.error) & (t value) & (\operatorname{Pr}(>|t|))\\ 
\hline \\[-1.5ex]

和

\begin{longtable}{@{} l cccc @{}}

%% headers and footers

\caption{Results of the DCC-GARCH model for stock market indices} 
\label{tab_dccgarch} \\ 
\toprule
& \multicolumn{4}{c@{}}{\textit{Outcome}} \\ 
\cmidrule(l){2-5} 
& (Estimate) & (Std.error) & ($t$-value) & ($\mathrm{Pr}>|t|$)\\ 
\midrule
\endfirsthead

\multicolumn{5}{@{}l}{Table \thetable, continued} \\[0.5ex} 
\toprule
& \multicolumn{4}{c@{}}{\textit{Outcome}} \\ 
\cmidrule(l){2-5} 
& (Estimate) & (Std.error) & ($t$-value) & ($\mathrm{Pr}>|t|$)\\ 
\midrule
\endhead

\midrule
\multicolumn{5}{r@{}}{\footnotesize(Cont'd on following page)}\\
\endfoot

\bottomrule
\endlastfoot

代替

\hline \\[-1.5ex] 
Information Criteria &  & &  &  \\
  & & & & \\

和

\midrule
\multicolumn{5}{@{}l}{Information Criteria} \\

删除或只是注释掉所有
```
 & & & & \\ 
```
線。

代替

\hline 
\hline \\[-1.5ex] 
\end{tabular} 
\end{table}

和

\end{longtable}

为了让桌子更有吸引力，我还会圆形的将所有数字保留为三位小数。这可以借助包S提供的列类型轻松完成siunitx。

\documentclass{article}

\usepackage[margin=2.5cm]{geometry} % set page parameters suitably
\usepackage{longtable,booktabs}
\setlength\LTcapwidth{\textwidth}
\usepackage{siunitx}
%% column type for automatic rounding to three digits:
\newcolumntype{T}[1]{S[table-format=#1,round-mode=places,round-precision=3]}

\begin{document}

\begin{longtable}{@{} l T{-2.3} T{1.3} T{3.3} T{1.3} @{}}

%% headers and footers

\caption{Results of DCC-GARCH model for stock market indices} 
\label{tab_dccgarch} \\ 
\toprule
& \multicolumn{4}{c@{}}{Outcome} \\ 
\cmidrule(l){2-5} 
& {Coeff.} & {Std err} & {$t$-value} & {$\mathrm{Pr}>|t|$} \\ 
\midrule
\endfirsthead

\multicolumn{5}{@{}l}{Table \thetable, continued} \\[0.5ex]
\toprule
& \multicolumn{4}{c@{}}{\textit{Outcome}} \\ 
\cmidrule(l){2-5} 
& {Coeff.} & {Std err} & {$t$-value} & {$\mathrm{Pr}>|t|$} \\ 
\midrule
\endhead

\midrule
\multicolumn{5}{r@{}}{\footnotesize(Cont'd on following page)}\\
\endfoot

\bottomrule
\endlastfoot

%% body of table

 GDAXI.mu & 0.000000 & 0.000821& 0.000000& 1.000000 \\ 
  %& (0.037) & (0.035) & (0.047) & (0.032) \\ 
\addlinespace
 GDAXI.omega & 0.000000 & 0.000003 & 0.048846 & 0.961042 \\ 
  %& (0.039) & (0.036) & (0.049) & (0.033) \\ 
\addlinespace
 GDAXI.alpha1 & 0.050730& 0.012555 & 4.040571& 0.000053 \\ 
 % & (0.029) & (0.027) & (0.037) & (0.025) \\ 
\addlinespace
 GDAXI.beta1 & 0.900100 & 0.032728& 27.502568 & 0.000000 \\ 
 % & (0.043) & (0.040) & (0.055) & (0.037) \\ 
\addlinespace
 FCHI.mu & 0.000000 & 0.000813 & 0.000000 & 1.000000 \\ 
  %& (0.036) & (0.033) & (0.045) & (0.030) \\ 
\addlinespace
 FCHI.omega & 0.000000 & 0.000004 & 0.031265 & 0.975058 \\ 
 % & (0.028) & (0.026) & (0.035) & (0.024) \\ 
\addlinespace
 FCHI.alpha1 & 0.051329 & 0.016720 & 3.069932 & 0.002141\\ 
 % & (0.031) & (0.028) & (0.039) & (0.026) \\ 
\addlinespace
 FCHI.beta1 &0.900178 & 0.039227& 22.948028 & 0.000000 \\ 
  %& (0.043) & (0.040) & (0.055) & (0.037) \\ 
\addlinespace
 FTAS.mu & 0.000000 &  0.000818 & 0.000000 & 1.000000\\ 
  %& (0.034) & (0.032) & (0.043) & (0.029) \\ 
\addlinespace
 FTAS.omega & 0.000000 &  0.000003  & 0.077804 & 0.937984 \\ 
 % & (0.028) & (0.026) & (0.036) & (0.024) \\ 
\addlinespace
 FTAS.alpha1 & 0.051058 & 0.011707 &  4.361314 & 0.000013 \\ 
  %& (0.042) & (0.039) & (0.053) & (0.036) \\ 
\addlinespace
 FTAS.beta1& 0.900120 & 0.028077 & 32.058802 & 0.000000\\ 
  %& (0.038) & (0.035) & (0.048) & (0.032) \\ 
\addlinespace
 SSMI.mu & 0.000000 & 0.000686 & 0.000000 &1.000000 \\ 
  %& (0.043) & (0.040) & (0.054) & (0.037) \\ 
\addlinespace
 SSMI.omega & 0.000000 & 0.000002 & 0.049328 & 0.960658 \\ 
 % & (0.028) & (0.026) & (0.036) & (0.024) \\ 
\addlinespace
 SSMI.alpha1 & 0.051473 &0.007339 & 7.013881&  0.000000\\ 
  %& (0.045) & (0.042) & (0.057) & (0.038) \\ 
\addlinespace
 SSMI.beta1 &0.900169 & 0.017583 & 51.196838 & 0.000000 \\ 
  %& (0.037) & (0.034) & (0.046) & (0.031) \\ 
\addlinespace
 dcca1 & 0.023229 & 0.003674 & 6.322145 & 0.000000 \\ 
  %& (0.0004) & (0.0004) & (0.001) & (0.0004) \\ 
\addlinespace
 dccb1 & 0.957464 & 0.006762 & 141.590704 & 0.000000\\ 
  %& (0.0004) & (0.0004) & (0.001) & (0.0004) \\ 
\midrule
\multicolumn{5}{@{}l}{Information Criteria} \\
Akaike        & -24.205 &  &  &  \\ 
Bayes         & -24.055 &  &  &  \\ 
Shibata       & -24.207 &  &  &  \\ 
Hannan-Quinn  & -24.147 &  &  & \\[2mm]
Elapsed time: & 4.92738 &  &  &  \\ 

\end{longtable}
\end{document}

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长桌tabularray

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浮动表与`tabularray`