In this paper we show that findings of an apparently instable popularity function of U.S. presidents, as reported in the previous literature, are likely the consequence of the common use of linear estimation techniques. Employing Penalized Spline Smoothing in the context of Additive Mixed Models...

I use matched county pairs on either side of US state borders to investigate the causal effects of the Economic Freedom of North America index (EFNA) on local outcomes. This method is similar to Dube et al. (2010). I construct a panel of county pairs running from 1981-2012 and four measures of...

This research explores the biocultural origins of human capital formation. It presents the first evidence that moderate fecundity and thus predisposition towards investment in child quality was conducive for long-run reproductive success within the human species. Using an extensive genealogical...