Selection in the Market for Slaves: New Orleans, 1830-1860
通过比较本地奴隶与遗产拍卖奴隶的价格，检验逆向选择是否存在，发现无显著差异，并提出运输成本解释价格模式。
Greenwald and Glasspiegel argue that adverse selection depressed the market prices of slaves, causing current researchers to overestimate the rate of return from slavery. In this paper we test for the presence of adverse selection by comparing the prices of local slaves with the prices of slaves sold from estate sales. We find no difference in the prices of these slaves, from which we conclude that there was no significant adverse selection in the market. Instead, we propose an alternative explanation for the observed pattern of slave prices based on the costs of shipping slaves to the New Orleans market.