摘要
Abstract
Referring to the report released by the World Bank in 2020:Purchasing Power Parity and the Size of the World Economy—Results from the 2017 International Comparison Program,this paper conducts an in-depth comparison and analysis of the methods to calculate the world Gini coefficient from a theoretical perspective,and reveals that the population weighting method can reflect the root cause of the world wealth gap better than the definition method.The results go as below:The world Gini coeffi-cient has a downward trend from 1990 to 2021,and the world Gini coefficient measured by the population weighting method de-clines faster than the one measured by the definition method.Based on two different calculation methods for per capita GDP indi-cators(exchange rate method and PPP method),the world Gini coefficient measured by the population weighting method has dropped by 0.120 and 0.132 respectively over the past 32 years,with a decrease of 16.18%and 21.96%,respectively.Further-more,drawing on the idea of the contribution rate of poverty reduction,the paper calculates the average annual contribution rate of China to the decline of the Gini coefficient of the world and the Asia-Pacific region.The calculation results show that according to the population weighting method,when is used the exchange rate method and the PPP method as per capita GDP indicators,Chi-na's annual contribution rates to the narrowing of the global wealth gap from 1990 to 2021 reached 91.96%and 74.31%,respec-tively.According to the definition method,China's annual contribution rates are 4.59%and 6.69%,respectively.According to the population weighting method,when is used the PPP method for per capita GDP and consumption indicators,China's annual con-tribution rates to the narrowing of the wealth gap in the Asia Pacific region from 1990 to 2021 are 76.75%and 64.98%,respective-ly.关键词
世界基尼系数/定义法/人口权重法/购买力平价法/汇率法Key words
world Gini coefficient/definition method/population weighting method/PPP method/exchange rate method分类
社会科学
