Classroom peers are believed to influence learning by teaching each other, and the efficacy of this teaching likely depends on classroom composition in terms of peers' ability. Unfortunately, little is known about peer-to-peer teaching because it is never observed in field studies. Furthermore,...

This paper exploits a sharp reduction in patient cost sharing at age 70 in Japan, using a regression discontinuity design to examine its effect on utilization, health, and financial risk arising from out-of-pocket expenditures. Due to the national policy, cost sharing is 60-80 percent lower at...

Exploiting new data on county-level variation in alcohol prohibition from 1933 to 1939, we investigate whether the repeal of federal prohibition increased infant mortality, both in counties that repealed and in their neighboring counties. Using a binomial fixed-effects model, we find that repeal...

This study exploits over 5,000 variations in subsidy generosity across ages and municipalities in Japan to examine how children respond to healthcare prices. We find that free care significantly increases outpatient spending, with price elasticities considerably smaller than for adults. Price...

We investigate whether individuals' risk preferences change after experiencing a natural disaster, specifically, the 2011 Great East Japan Earthquake. Exploiting the panels of nationally representative surveys on risk preferences, we find that men who experienced greater intensity of the...

Risk preferences play a fundamental role in individuals' economic decision-making. We examine whether the historical macroeconomic environment shapes individuals' willingness to take risks. Using nationally representative samples from Japan and exploiting regional variation in economic...

Using birth records in Japan, where school entry rule is strictly enforced, this paper shows that more than 1,800 births a year are shifted from one week before the school entry cutoff date to one week following the cutoff date. Because older children perform better academically than their...

We estimate the impact of mask mandates and other non-pharmaceutical interventions (NPI) on COVID-19 case growth in Canada, including regulations on businesses and gatherings, school closures, travel and self-isolation, and long-term care homes. We partially account for behavioral responses...

Economists have long been aware of utility externalities such as a tendency to compare own income with others'. If welfare losses from income comparisons are significant, any governmental interventions that alter such attitudes may have large welfare consequences. We conduct an original online...

Federal prohibition from 1920 to 1933 was one of the most ambitious policy interventions in US history. However, due to the political concessions necessary to bring about repeal, the removal of restrictions on alcohol after 1933 was not uniform. Using new data on city-level variation in alcohol...