Traditional human capital theory emphasizes a worker's investment in knowledge. However, when a worker is faced with day-to-day problems on the job, the solutions to the problems often require more knowledge from a team of experts within the firm. When a worker taps into the knowledge of...

We identify the impact of local firm concentration on incumbent performance with a quasi natural experiment. When Germany was divided after World War II, many firms in the machine tool industry fled the Soviet occupied zone to prevent expropriation. We show that the regional location decisions...

This paper uses firm-level information to evaluate how crises are transmitted internationally. It constructs a new data set of financial statistics, industry information, geographic data, and stock returns for over 10,000 companies in 46 countries to test what types of firms were most affected...

In his classic 1957 study of hybrid corn, Griliches emphasized the importance of economic incentives and profitability in the adoption of new technology, and this focus has been continued in the economics literature. But there is a distinct literature with roots in sociology emphasizing the...

This paper has a double purpose: to see how well Durkheim's (1897) findings apply a century later, and to see if the beneficial effects of social capital on suicide prevention are parallel to those already found for subjective well-being (Helliwell 2003). The results show that more social...

This paper surveys research on social capital. We explore the concepts that motivate the social capital literature, efforts to formally model social capital using economic theory, the econometrics of social capital, and empirical studies of the role of social capital in various socioeconomic...

It is well known that patent citations occur disproportionately between patents issued to inventors living in the same location, which has been taken as evidence of geographically localized knowledge spillovers. In this study, we find that patent citations also occur disproportionately often in...

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...

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...