Sex ratios (males to females) rose markedly in China in the last two decades, and crime rates nearly doubled. This paper examines whether the two are causally linked. High sex ratios imply fewer married men, and marriage has been conjectured to be a socializing force. Our paper exploits the...

Male and female social roles are largely predicated on the fact that male and female reproductive functions are separated in different individuals. This paper asks why gonochorism rather than hermaphroditism, is the rule among vertebrates. We argue that hermaphroditism may be unstable in the...

Goldin and Katz [2002], in an influential paper, argued that giving unmarried minors access to the contraceptive Pill was instrumental for women's professional advancement, because such access allowed marriage to be postponed. However, by 1960, married women could get the Pill and thence it is...

In 1980, housing prices in the main US cities rose with distance to the city center. By 2010, that relationship had reversed. We propose that this development can be traced to greater labor supply of high-income households through reduced tolerance for commuting. In a tract-level data set...

We review the literature on how parental investments respond to health endowments at birth. Recent studies have combined insights from an earlier theoretical literature on how households allocate resources within the family, with a growing empirical literature that identifies early life health...

We use the Islamic holy month of Ramadan as a natural experiment in fasting and fetal health. In Michigan births 1989-2006, we and prenatal exposure to Ramadan among Arab mothers results in lower birthweight and reduced gestation length. Exposure to Ramadan in the first month of gestation is...

We exploit education reforms in Sweden and other European countries to estimate the causal effects of longer and modernized compulsory education on civic engagement. In most countries, compulsory education was extended by 1-2 years, and the curricula were reformed to better foster democratic and...

This paper investigates to what extent the 1998 reform of Sweden's public old-age pension system contributed to the increase in extensive margin labor supply among older workers seen in the country in recent decades. We use a large data set containing all males and females born in Sweden between...

We analyze the consequences for sickness absence of a selective softening of job security legislation for small firms in Sweden in 2001. According to our differences-in-difference estimates, aggregate absence in these firms fell by 0.2-0.3 days per year. This aggregate net figure hides important...