Trader Selectivity and Measured Catch-Up Growth of American Slaves
针对批评者认为奴隶贩子选择性导致儿童身高测量偏差的质疑，本文利用国家档案馆所有奴隶船货清单的新数据库，通过匹配发货人姓名与已知或疑似专业贩子，发现贩子选择性造成的年龄别身高偏差相对于四英寸追赶增长可忽略不计。
Critics who doubt the sources and meaning of some four inches of catch-up growth claim that market-based distortions created by slave traders biased measured heights of children and adolescents. Here we analyze this possible bias using a new database of all slave manifests available at the National Archives. Employing procedures to match names of shippers with known or suspected professional traders, we find that biases in height by age due to trader selectivity were negligible relative to the four inches of catch-up growth.