Migrant Self-Selection and Random Shocks: Evidence from the Panic of 1907
研究了1907年恐慌（大萧条前最严重的经济危机）如何改变墨西哥移民的身高选择模式：危机前正向选择（身高较高者更可能移民），危机期间转为负向选择，危机后恢复正向选择，部分通过历史劳工招募系统（enganche）调节。
We study the impact of the 1907 Panic, the most severe economic crisis before the Great Depression, on the selection of Mexican immigration. We find that migrants were positively selected on height before the crisis. This pattern changed to negative selection during the crisis but returned to positive selection afterward. Adjustments in selection were partially mediated by the enganche , a historical labor-recruiting system that reduced migration costs but only for taller laborers with above-average earnings potential. We document that labor recruiting contributed to maintaining the relatively constant height profile of the migration flow in the short run.