Table 4.

Model quality

	${\mathit{R}}^{\mathbf{2}}$	${\overline{\mathit{R}}}^{\mathbf{2}}$	MAPE	RESET	p -value
Base model	0.2263	0.1144	5.6401	0.1712	>0.1
Control model	0.2810	0.2326	5.8724	0.4308	>0.1
Google model	0.4620	0.3362	4.9390	0.2473	>0.1
Google vs Base	+0.2357	+0.2218	−0.7011	-	-

Analyses of $R^2$, ${\overline{R}}^2$, and MAPE statistics all provide evidence that the base model is enhanced when data on Google searches for the terms ‘depression’ and ‘suicide’ are added. The RESET test results suggest that we do not need to add polynomial transformations of the dependent variables.