What motivated men to risk death in the most horrific war in U.S. history when pay was low and irregular and military punishment strategies were weak? In such a situation creating group loyalty by promoting social capital is of paramount importance and in the Civil War was the cement of both...

A growing literature relies on natural experiments to establish causal effects in macroeconomics. In diverse applications, natural experiments have been used to verify underlying assumptions of conventional models, quantify specific model parameters, and identify mechanisms that have major...

This paper aims to show that culture is an important determinant of the effectiveness of formal democratic institutions, such as elections. We collect new data to document the presence of voluntary and social organizations and the history of electoral reforms in Chinese villages. We use the...

Social capital is often associated with desirable political and economic outcomes. This paper contributes to the literature exploring the "dark side" of social capital, examining the downfall of democracy in interwar Germany. We collect new data on the density of associations in 229 German towns...

Social capital can facilitate community governance, but not all social capital is alike. We distinguish bonding social capital (within a village) from bridging social capital (between villages), and we compare their effects on the management of a common pool resource. We develop a theoretical...

We use several data sets to consider the effect of teaching practices on student beliefs, as well as on organization of firms and institutions. In cross-country data, we show that teaching practices (such as copying from the board versus working on projects together) are strongly related to...

We combine theory with data from different domains to provide an empirical analysis of the scale and variability of social capital as wealth. This is used to argue, given what we have learned in the literature on social capital, that the welfare returns to investing in trust could be...

We use detailed data from Indonesian cities to study how variation in density within urban areas affects social capital. For identification, we instrument density with soil characteristics, and control for community averages of observed characteristics. Under plausible assumptions, these...

In this paper--the first in a series of two papers that use data on 21 billion friendships from Facebook to study social capital--we measure and analyze three types of social capital by ZIP code in the United States: (i) connectedness between different types of people, such as those with low vs....

Low levels of social interaction across class lines have generated widespread concern and are associated with worse outcomes, such as lower rates of upward income mobility. Here, we analyze the determinants of cross-class interaction using data from Facebook, building upon the analysis in the...