Patient Cost-sharing and Health Care Utilization among Children (with Toshiaki Iizuka)

Exploiting the variation in the amount of subsidy for child health care by municipality, age and time in Japan, this paper examines the effect of patient cost-sharing on child health care utilization. Using longitudinal claims data and triple difference-in-difference framework, we find that reduced cost-sharing significantly increases utilization of outpatient care among children. We further investigate whether these increase in outpatient visits solely reflects moral hazard or increases in beneficial care.

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Hitoshi Shigeoka received a B.A. (2001) and an MA (2003) in chemical engineering from University of Tokyo, and master of international affairs (2006) and PhD in economics (2012) from Columbia University. Hitoshi’s research interests include health, labor, public economics, and experimental economics. His current research involves estimating the demand elasticity of health care utilization, examining the degree of supplier-induced demand by physicians and hospitals, examining the effects of competition and peer-to-peer teaching on learning, and investigating how the long-term incentives of mothers affect the timing of births.