\begin{table}
	\caption{\textbf{Table 3.} Multi variant linear regression analysis of article citations $C$ vs.~twitter mentions $T$, article arXiv downloads $A$, and time in days elapsed between beginning of our test period and submission of article, $P$. *: p$<$0.1,**: p$<$0.05,***: p$<$0.01,****: p$<$0.001}
	\begin{tabular}{lrrr}
	\textbf{model}										&	\textbf{$\beta_1$ (st. error)}			&		\textbf{$\beta_2$ (st. error)}			&	\textbf{$\beta_3$ (st. error)}		\\
	$C=\beta_{1}T+\beta_{2}P+\varepsilon_1$			&	$0.150^{***}$ (0.035)		&		$0.044^{**}$(0.019)			&	-					\\
	$C=\beta_{1}A+\beta_{2}P+\varepsilon_2$			&	2e-04$^{***}$ (7e-05)		&		$0.038^{*}$(0.020)			&	-					\\
	$C=\beta_{1}T+\beta_{2}A+\beta_{3}P+\varepsilon_3$ 	&	$0.120^{***}$ (0.040)		&		1e-04(8e-05)				&	$0.041^{**}$(0.019)			\\
	\end{tabular}
\end{table}