Figure 1b in the above article contains a computational error. The correct figure is published as Figure 1 in a subsequent Letter to the Editor (Am J Phys Anthropol 152:427–428. doi: 10.1002/ajpa.22364). This error also contributed to the incorrect milk fat concentration value for economically sufficient mothers with daughters on pages 52 (abstract), 56 and 57. The value should be 1.74 gm/dl (not 0.6 gm/dl).