The Fertility Effect of Laws Granting Undocumented Migrants Access to Driver’s Licenses in the United States
研究美国16个州及哥伦比亚特区允许无证移民获得驾照的法律，发现该法律降低了疑似无证已婚女性的生育率，原因在于提高了生育的机会成本。
As of 2021, 16 US states and the District of Columbia have implemented laws allowing undocumented migrants to acquire driver’s licenses. In this paper, I hypothesize that lower barriers to work due to the ability to obtain driver’s licenses can affect undocumented migrants’ fertility decisions. Using a difference-in-differences strategy, I find that these laws were associated with a decline in childbirth among likely undocumented married women. Further analysis suggests that the negative effect of the laws on likely undocumented women’s fertility comes from the rise in the opportunity costs of childbearing, which, in turn (1) increases the usual hours worked among employed undocumented married women and (2) affects the selection into marriage.