Mesa bagunçada com tabularx

Question

Gostaria de ter todos os valores da tabela alinhados. No entanto, ao usar tabularx, isso parece ainda pior. Acho que pode ser porque tenho algo assim: \thead[l]{Batatas \ Massa \ Arroz}, porque na minha outra tabela (11) que contém apenas palavras isoladas, tabularx funciona perfeitamente.

   \documentclass{article}
    \usepackage{geometry}
    \usepackage{float}
    \usepackage{siunitx}
    \usepackage{tabularx}

\begin{document}

\begin{table}[H]
       \centering
       \renewcommand{\arraystretch}{1.7}
       \begin{tabular}[width=\textwidth]{l l l l l l l}
       \hline
       \hline
        \multicolumn{7}{c}{Price} \\
       \hline
          & Meat & Dairy & Vegetables & Fruits & \thead[l]{Potatoes \\ Pasta \\ Rice} & \thead[l]{Bread \\ Oats}  \\
          \hline
          \hline
          Meat &  -1.017***   &  0.044***  &  -0.090***  &  -0.140***  &  -0.049***  &  -0.165***\\
          
          Dairy &   0.097***  &  -1.009***  &  -0.044***  &  -0.009  &      0.030***  &  -0.021**\\
          
          Fruits  &  0.000   &    -0.044***  &  -0.688***  &   0.006  &      -0.039***   &  0.020 \\
          
          Vegetables &  -0.089*** &    0.057***  &   0.025*  &    -0.673*** &   -0.001    &    0.009\\
          
          \thead[l]{Potatoes \\ Pasta \\ Rice}   & -0.194***  &  -0.046** &     -0.016   &    -0.073***  &  -0.780***  &  -0.043*\\
          
          \thead[l]{Bread \\ Oats}   &  0.003  &     -0.099***  &  -0.118***  &  -0.047**  &    0.010    &   -0.496***\\ 
          \hline
          \hline
           \multicolumn{7}{c}{\footnotesize  * p$<$0.1, ** p$<$0.05, *** p$<$0.01}
       \end{tabular}
       \caption{First stage estimation of own- and cross-price elasticities}
       \label{cross_price_1}
\end{table}

\begin{table}[H]
       \centering
       \renewcommand{\arraystretch}{1.7}
       \begin{tabularx}{0.7\textwidth}{XSSS}
       \hline
       \hline
        \multicolumn{4}{c}{Price} \\
       \hline
          & {Beef} & {Pork} & {Poultry}  \\
          \hline
          \hline
          Beef & -0.494***   &  -0.516***  & -0.228***   \\
          
          Pork & -0.048***   &  -0.903***   &  0.008  \\
          
          Poultry  &   -0.209***  &   -0.082**  &  -0.822***  \\
          \hline
          \hline
           \multicolumn{4}{c}{\footnotesize  * p$<$0.1, ** p$<$0.05, *** p$<$0.01}
       \end{tabularx}
       \caption{Second stage estimation of own- and cross-price elasticities}
       \label{cross_price_2m}
\end{table}

\end{document}

Answer 1

• Nessas tabelas são normalmente utilizadas Scolunas definidas no siunitxpacote, que permitem alinhar números em casas decimais.
• Você usa \theado comando definido no makecellpacote, mas não carrega este pacote.
• Para tabularvocê não pode prescrever a largura da tabela. Isto é possível emtabular*
• tente o seguinte MWE (Exemplo Mínimo de Trabalho):

\documentclass{article}
\usepackage{geometry}
\usepackage{siunitx}
\usepackage{makecell,    % <---
            tabularx}

\begin{document}
\begin{table}[ht]
   \centering
   \renewcommand{\arraystretch}{1.7}
   \sisetup{table-format=-1.3{***}}
            
   \begin{tabular}{l *{6}{S}}
       \hline
       \hline
       \multicolumn{7}{c}{Price} \\
       \hline
        & {Meat} & {Dairy} & {Vegetables} & {Fruits} & {\thead[l]{Potatoes \\ Pasta \\ Rice}} & {\thead[l]{Bread \\ Oats}}  \\
          \hline
          \hline
Meat    & -1.017*** &  0.044*** & -0.090*** & -0.140*** & -0.049*** & -0.165***     \\
Dairy   &  0.097*** & -1.009*** & -0.044*** & -0.009    &  0.030*** & -0.021**      \\
Fruits  &  0.000    & -0.044*** & -0.688*** &  0.006    & -0.039*** &  0.020        \\
Vegetables 
        & -0.089*** &  0.057*** &  0.025*   & -0.673*** & -0.001    &  0.009        \\
\thead[l]{Potatoes \\ Pasta \\ Rice}   
        & -0.194*** & -0.046**  & -0.016    & -0.073*** & -0.780*** & -0.043*       \\
\thead[l]{Bread \\ Oats}   
        &  0.003    & -0.099*** & -0.118*** & -0.047**  &  0.010    & -0.496***     \\
    \hline
    \hline
\multicolumn{7}{c}{\footnotesize  * p$<$0.1, ** p$<$0.05, *** p$<$0.01}
    \end{tabular}
\caption{First stage estimation of own- and cross-price elasticities}
\label{cross_price_1}
\end{table}
\end{document}