We assess whether the COVID-19 vaccine induces COVID-19 risky behavior (e.g., going to bars and restaurants) and thus reduces vaccine efficacy. A key empirical challenge is the endogeneity bias when comparing risk-taking by vaccination status since people choose whether to get vaccinated. To...

This paper examines the interactive effect of distance and trade on international conflict and cooperation. The effect of geographic distance depends on trade, while the effect of trade varies with geographic distance. Trade reduces conflict to a greater extent when dyads are geographically...

We extend prior research on the effect of managed care on the receipt of four medical interventions for pregnant women: ultrasound, induction/stimulation of birth, electronic fetal monitor, and cesarean delivery. Propensity score methods are used to account for sample selection issues regarding...

Since 1976, the gender gap in wages on average declined about one percent per year. This article focuses on identifying the factors underlying this trend. Three data sets are analyzed--the Current Population Survey, the Panel Study of Income Dynamics, and the National Longitudinal Survey. The...

This study relies on Brazilian census data from 1960-2000 to analyze long-term trends in racial and gender wage disparities in the urban labor market of São Paulo, one of Latin America's most dynamic economies. Afro-Brazilians and women have made ...

Current empirical growth models limit the determinants of country growth to geographic, economic, and institutional variables. This study draws on conflict variables from the Correlates of War (COW) project to ask a critical question: How do different types of conflict affect country growth...