We analyze the effect of a wife’s human capital on her husband’s earnings, using individual-level data for Japan in the period 2000–2003. We find a positive association between a wife’s education and her husband’s earnings, which can be attributed to the assortative mating effect as...

Using a data set for all sumo wrestlers in the post-World War II period, this paper investigates how wrestlers’ body mass index (BMI) is associated with wrestlers’ winning rate and absence rate. Further, the effect of BMI is compared between an early period (before the emergence of foreign...

Japanese household-level data describing a husband's earnings, his wife's working status, and their schooling levels are used to test the implications of a model proposing a time-consuming process of human capital accumulation within marriages, in which an educated wife is more productive. The...

Sumo wrestling is a traditional fighting sport in Japan and has been popular since the 18th century (the Edo period). Using a data set for all sumo wrestlers in the post-World War II period, this paper investigates how wrestlers’ body mass index (BMI) is associated with their win rate and...