Summary Statistics for Russia-Protected Areas.

Abstract

<p><i>*p<0.1;</i></p><p><i>**p<0.05;</i></p><p><i>***p<0.01</i></p><p>Standard deviations in parentheses. T-tests test for differences in means assuming unequal variances. “Before matching” uses the full sample; “After matching” is based on 1-to-1 propensity score matching without replacement and limiting the maximum distance between matches with a caliper. Normalized differences in means are calculated as recommended by [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0141380#pone.0141380.ref005" target="_blank">5</a>]. There is no test for statistical significance associated with normalized differences in means but a rule of thumb is that sizes larger than 0.25 can bias simple ordinary least squares regression.</p><p>^aAfter matching, pre-treatment forest disturbance was “0” for both protected areas and areas outside of protected areas; thus, differences in means could not be calculated.</p><p>Summary Statistics for Russia-Protected Areas.</p