The ratings of political institutions are well-known and widely used in academic literature. These ratings are mostly based on expert evaluations. However, such evaluations can be subjective and occasionally driven by ideological considerations. In this paper we propose two new indicators of...

Human capital plays an important role in the theory of economic growth, but it has been difficult to measure this abstract concept. We survey the psychological literature on cross-cultural IQ tests and conclude that intelligence tests provide one useful measure of human capital. Using a new...

In the cross-country literature, cognitive skills are robust predictors of economic growth. We investigate claims by psychologists that the same is true at the state level. In a variety of specifications using four proxies for average state IQ used in the psychology literature, little evidence...

In the midst of a major U.S. military effort in Iraq and the Middle East, economists should be able to assess the relationship between U.S. troops and growth. The necessity of military force in providing security for nation-building is a common assumption among policymakers and international...

Human capital plays an important role in the theory of economic growth, but it has been difficult to measure this abstract concept. We survey the psychological literature on cross-cultural IQ tests and conclude that modern intelligence tests provide one useful measure of human capital. Using a...