The GPIH Group thanks the Institute of Governmental Affairs, UC Davis, for housing this internet site. The Group is also grateful for funding from the U.S. National Science Foundation under awards #SES0433358 (to IGA, UC Davis) and #SES0649062 (to the National Bureau of Economic Research). Its researchers also benefit greatly from their frequent consultations with fellow members of the All-UC Group in Economic History and the International Institute of Social History (IISG, Netherlands).