The Programme was launched in 1968 by the United Nations Statistics Division and the University of Pennsylvania to estimate the PPPs of countries, and was transferred to the World Bank as of the 1993 round.
该方案是联合国统计司和宾夕法尼亚大学于1968年为估算国家的购买力平价发起的，到1993年周期时被移交给世界银行。