[Tex/LaTex] What’s the illegal character in Stargazer LaTeX output for Regression Table

dcolumnmulticolumnrtables

I'm trying to use a stargazer LaTeX output for a basic OLS regression table in R, but the compilation keeps breaking down in the 

\begin{tabular}{@{\extracolsep{5pt}}ld{.}{.}{-3}}

line due to an illegal character.
Here's the code:

\documentclass[12pt]{report}
\raggedright
\linespread{1.3}
\parskip=24pt

\usepackage{graphicx}

\usepackage{amsmath}

\usepackage[margin=1in]{geometry} % 1 inch margins all around

\usepackage[export]{adjustbox}

\usepackage{setspace}

\usepackage[utf8]{inputenc}

\begin{document}   

Question 1\par
\includegraphics{unit2q1_scatterplot.png}

Question 2\par
\begin{table}[!htbp] \centering 
  \caption{OLS Regression Results} 
  \label{}
\begin{tabular}{@{\extracolsep{5pt}}ld{.}{.}{-3}}
\\[-1.8ex]\hline 
\hline \\[-1.8ex] 
 & \multicolumn{1}{c}{\textit{Dependent variable:}} \\ 
\cline{2-2} 
\\[-1.8ex] & \multicolumn{1}{c}{Gun Regulations} \\ 
\hline \\[-1.8ex] 
 State Population (Hund Thou) & 0.070^{**} \\ 
  & (0.028) \\ 
  Constant & 20.194^{***} \\ 
  & (2.539) \\ 
 \hline \\[-1.8ex] 
Observations & \multicolumn{1}{c}{50} \\ 
R$^{2}$ & \multicolumn{1}{c}{0.116} \\ 
Adjusted R$^{2}$ & \multicolumn{1}{c}{0.098} \\ 
Residual Std. Error & \multicolumn{1}{c}{13.286 (df = 48)} \\ 
F Statistic & \multicolumn{1}{c}{6.298$^{**}$ (df = 1; 48)} \\ 
\hline 
\hline \\[-1.8ex] 
\textit{Note:}  & \multicolumn{1}{r}{$^{*}$p$<$0.1; $^{**}$p$<$0.05; $^{***}$p$<$0.01} \\ 
\end{tabular} 
\end{table} 

\end{document}

Can anyone tell me which character is illegal and why?

Best Answer

d{.}{.}{-3}

is not a defined column type. Perhaps you intended to use the dcolumn package (but that uses D not d)

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