Childhood Medicaid Coverage and Later Life Health Care Utilization
利用出生日期导致的童年医疗补助资格断点，研究发现更多童年资格年限与成年后住院减少相关，对黑人群体效果显著，且慢性病和低收入地区效应更明显。
Exploiting a discontinuity in childhood Medicaid eligibility based on date of birth, we find that more years of childhood eligibility are associated with fewer hospitalizations in adulthood. For blacks, we find a 7% to 15% decrease in hospitalizations and a suggestive 2% to 5% decrease in emergency department visits, but no similar effect for nonblacks. The effects are pronounced for utilization related to chronic illnesses and for patients living in low-income postal codes. Calculations suggest that lower rates of hospitalizations during one year in adulthood for blacks offset between 2% and 4% of the initial costs of expanding Medicaid for all children.