Recreational marijuana legalization and admission to the foster‐care system
利用美国各州大麻合法化的时间差异，研究发现娱乐性大麻合法化使寄养安置率下降至少10%，对因父母吸毒、酗酒、虐待、忽视或入狱导致的入院影响更大。
Abstract We estimate the effects of legalized recreational marijuana on entry into the foster‐care system. Exploiting state‐level variation in legalization and its timing, we estimate that legalization decreases foster‐care placements by at least 10%, with larger effects in years after legalization, and for admissions for reasons of parental drug and alcohol abuse, physical abuse, neglect, and parental incarceration. Our findings imply that legalization may have important consequences for child welfare, and that substitution toward marijuana from other substances can be an important part of how legalization affects admissions.