有人知道如何在 longtable 中让列间距相等吗？我的代码附在下面。谢谢。Franz
\documentclass[12pt,a4paper]{article} \usepackage[latin1]{inputenc}
\usepackage{import} \usepackage{amsmath} \usepackage{amsfonts}
\usepackage{amssymb} %\usepackage{float} \usepackage{lscape}
\usepackage{setspace} \usepackage{color} \usepackage{geometry}
\geometry{a4paper,left=25.4mm,right=25.4mm,top=25.4mm,bottom=25.4mm}
\usepackage{epsfig} \usepackage{epstopdf} \epstopdfsetup{update}
\usepackage{booktabs} \usepackage{dcolumn} \usepackage{natbib}
\usepackage{caption} \usepackage{subcaption} \usepackage{longtable}
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\setlength{\tabcolsep}{1pt}
\renewcommand{\arraystretch}{.7}
\begin{scriptsize}
\begin{longtable}{l*{7}{c}}
\caption{Unconditional Quantile Wage Regressions: Non-performance paid, 2003-2004 \label{tab rifquantnw0304}}\\
\hline\hline\endfirsthead\hline\endhead\hline\endfoot\endlastfoot
&\multicolumn{1}{c}{RIF5}&\multicolumn{1}{c}{RIF10}&\multicolumn{1}{c}{RIF25}&\multicolumn{1}{r}{RIF50}&\multicolumn{1}{c}{RIF75}&\multicolumn{1}{c}{RIF90}&\multicolumn{1}{c}{RIF95}\\
\hline
Age & 0.0930\sym{**} & 0.0847\sym{***}& 0.127\sym{***}& 0.105\sym{***} & 0.0275 & -0.150\sym{***}& -0.189\sym{***} \\
& (3.14) & (4.42) & (7.52) & (7.04) & (1.78) & (-6.13) & (-5.77) \\
Age squared/1000 & -1.283\sym{***}& -1.100\sym{***}& -1.326\sym{***}& -1.081\sym{***} & -0.217 & 1.804\sym{***}& 2.217\sym{***} \\
& (-3.64) & (-5.04) & (-7.78) & (-7.31) & (-1.39) & (6.95) & (6.07) \\
Female & -0.109\sym{**} & -0.253\sym{***}& -0.401\sym{***}& -0.364\sym{***} & -0.227\sym{***}& -0.186\sym{***}& -0.129\sym{***} \\
& (-2.66) & (-7.56) & (-13.53) & (-15.18) & (-9.87) & (-6.54) & (-3.98) \\
Married & 0.0324 & -0.0387 & -0.00840 & 0.0631\sym{*} & 0.147\sym{***}& 0.122\sym{***}& 0.118\sym{***}\\
& (0.75) & (-1.41) & (-0.33) & (2.51) & (5.68) & (4.10) & (4.35) \\
Number of kids & -0.0501 & -0.0390 & -0.00465 & 0.00457 & -0.0178 & -0.00818 & 0.0195 \\
& (-1.14) & (-1.31) & (-0.19) & (0.21) & (-0.75) & (-0.22) & (0.44) \\
Elementary school & -0.0545 & -0.220\sym{**} & -0.199\sym{***}& -0.103\sym{**} & 0.00754 & 0.0672\sym{*} & 0.122\sym{**} \\
& (-0.52) & (-3.06) & (-4.76) & (-3.19) & (0.23) & (2.01) & (2.93) \\
\hline
Observations & 5882 & 5882 & 5882 & 5882 & 5882 & 5882 & 5882 \\
\hline\hline
\end{longtable}
\end{scriptsize}
\end{document}
答案1
（我意识到你的问题似乎是关于获得相等的宽度之间的列longtable。但是，由于列间空白由给出2\tabcolsep，因此列间宽度已经相等。因此，我将你的问题解释为关于获取列宽相等。
在本例中，由于您已经加载了dcolumn包，您可以通过以下方式实现您的目标：（i）定义一个名为 的新列类型d，对数字进行小数对齐；（ii）用 替换规范c。d{3.6}这样做将确保d-type 列都具有相同的宽度；因此，相邻列之间小数点之间的水平距离是恒定的。
另外，由于您正在加载booktabs包，您可能还想用、等替换各种\hline指令\toprule。\midrule
事实证明，无需进行\scriptsize，即，大约 30% 的字体大小线性减少，即可使表格适合。执行\footnotesize（大约 20% 的字体大小减少）就足够了。
\documentclass[12pt,a4paper]{article}
\usepackage[latin1]{inputenc}
%% I've commented out the packages that aren't needed for this MWE
%\usepackage{import}
%\usepackage{amsmath}
%\usepackage{amsfonts}
%\usepackage{amssymb}
%\usepackage{float}
%\usepackage{lscape}
%\usepackage{setspace}
%\usepackage{color}
\usepackage[margin=1in]{geometry}
%\usepackage{epsfig}
%\usepackage{epstopdf}
%\epstopdfsetup{update}
\usepackage{booktabs}
\usepackage{dcolumn}
\newcolumntype{d}[1]{D{.}{.}{#1}}
%\usepackage{natbib}
%\usepackage{caption}
%\usepackage{subcaption}
\usepackage{longtable}
\setlength\LTcapwidth{\textwidth}
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\newcommand\mc[1]{\multicolumn{1}{c}{#1}} % handy shortcut macro
\begin{document}
%%\renewcommand{\arraystretch}{.7}
\begingroup
\setlength{\tabcolsep}{2pt} % default value: 6pt
\footnotesize
\begin{longtable}{@{} l *{7}{d{3.6}} @{}} % replace "c" with "d{3.6}"
\caption{Unconditional Quantile Wage Regressions: Non-performance paid, 2003--2004}
\label{tab rifquantnw0304}\\
\toprule\endfirsthead
\midrule\endhead
\midrule\endfoot
\bottomrule\endlastfoot
&\mc{RIF5}& \mc{RIF10}& \mc{RIF25}& \mc{RIF50}& \mc{RIF75}& \mc{RIF90}& \mc{RIF95}\\
\midrule
Age & 0.0930\sym{**} & 0.0847\sym{***}& 0.127\sym{***}& 0.105\sym{***} & 0.0275 & -0.150\sym{***}& -0.189\sym{***} \\
& (3.14) & (4.42) & (7.52) & (7.04) & (1.78) & (-6.13) & (-5.77) \\
Age squared/1000 & -1.283\sym{***}& -1.100\sym{***}& -1.326\sym{***}& -1.081\sym{***} & -0.217 & 1.804\sym{***}& 2.217\sym{***} \\
& (-3.64) & (-5.04) & (-7.78) & (-7.31) & (-1.39) & (6.95) & (6.07) \\
Female & -0.109\sym{**} & -0.253\sym{***}& -0.401\sym{***}& -0.364\sym{***} & -0.227\sym{***}& -0.186\sym{***}& -0.129\sym{***} \\
& (-2.66) & (-7.56) & (-13.53) & (-15.18) & (-9.87) & (-6.54) & (-3.98) \\
Married & 0.0324 & -0.0387 & -0.00840 & 0.0631\sym{*} & 0.147\sym{***}& 0.122\sym{***}& 0.118\sym{***}\\
& (0.75) & (-1.41) & (-0.33) & (2.51) & (5.68) & (4.10) & (4.35) \\
Number of kids & -0.0501 & -0.0390 & -0.00465 & 0.00457 & -0.0178 & -0.00818 & 0.0195 \\
& (-1.14) & (-1.31) & (-0.19) & (0.21) & (-0.75) & (-0.22) & (0.44) \\
Elementary school & -0.0545 & -0.220\sym{**} & -0.199\sym{***}& -0.103\sym{**} & 0.00754 & 0.0672\sym{*} & 0.122\sym{**} \\
& (-0.52) & (-3.06) & (-4.76) & (-3.19) & (0.23) & (2.01) & (2.93) \\
\midrule
Observations & \mc{5882} & \mc{5882} & \mc{5882} & \mc{5882} & \mc{5882} & \mc{5882} & \mc{5882} \\
\end{longtable}
\endgroup % end of scope of \footnotesize directive
\end{document}