NBER Working Papers by Lena Edlund

Sex ratios at birth are above the biologically normal level in a number of Asian countries, notably India and China. Standard explanations include poverty and a cultural emphasis on male offspring. We study Asian immigrants to Canada using Census data, focussing on sex ratios across generations and religious groups. We find sex ratios to be normal at first parity, but rising with parity if there were no previous son. Since these immigrants are neither poor nor live in a society tolerant of sex discrimination/sex selection, our findings are more consistent with a preference for sons per se (and not for sons as a means to, e.g., old age support). Additionally, we uncover strong differences by religious affiliation that align with historical differences in doctrine concerning infanticide. Com...

This paper estimates the effects of maternal malnutrition exploiting the 1959-1961 Chinese famine as a natural experiment. In the 1% sample of the 2000 Chinese Census, we find that fetal exposure to acute maternal malnutrition had compromised a range of socioeconomic outcomes, including: literacy, labor market status, wealth and marriage market outcomes. Women married spouses with less education and later, as did men, if at all. In addition, maternal malnutrition reduced the sex ratio (males to females) in two generations -- those prenatally exposed and their children -- presumably through heightened male mortality. This tendency toward female offspring is interpretable in light of the Trivers-Willard (1973) hypothesis, according to which parents in poor condition should skew the offspring...

Japanese atomic bomb survivors irradiated 8-25 weeks after ovulation subsequently suffered reduced IQ [Otake and Schull, 1998]. Whether these findings generalize to low doses (less than 10 mGy) has not been established. This paper exploits the natural experiment generated by the Chernobyl nuclear accident in April 1986, which caused a spike in radiation levels in Sweden. In a comprehensive data set of 562,637 Swedes born 1983-1988, we find that the cohort in utero during the Chernobyl accident had worse school outcomes than adjacent birth cohorts, and this deterioration was largest for those exposed approximately 8-25 weeks post conception. Moreover, we find larger damage among students born in regions that received more fallout: students from the eight most affected municipalities were 3....

The extent of and changes in inter-generational mobility of wealth are central to understanding dynamics of wealth inequality but hard to measure. Using estate tax returns data, we observe that the share of women among the very wealthy (top 0.01%) in the United States peaked in the late 1960s, reaching almost 50%. Three decades on, women's share had declined to one third, a return to pre-war levels. We argue that this pattern mirrors the relative importance of inherited vs. self-made wealth in the economy and thus the gender-composition of the wealthiest may serve as a proxy for inter-generational wealth mobility. This proxy for "dynastic wealth'' suggests that wealth mobility in the past century decreased until the 1970s and rose thereafter, a pattern consistent with technological change ...