<p>Alternative strategies of estimation</p><p>GDS: Geriatric Depression Scale.</p>1<p>Caliper algorithm with a specified distance of 0.0005 and one-to-one merge (713 units in intervention and control groups).</p>2<p>Using epanechnikov kernel, and one-to-one matching (875 units in intervention and control groups).</p><p>Linear probability models with fixed effect at individual level, adjusted for time-varying covariates in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0113085#pone-0113085-t001" target="_blank">Table 1</a>.</p><p>Standard errors in brackets.</p><p>*p<0.10; **p<0.05; *** p<0.01.</p><p>Overall effect on mental health indicators.</p
