Inequality and the Impact of Growth on Poverty: Comparative Evidence for Sub-Saharan Africa
基于86个国家1977-2004年的面板数据，研究发现初始不平等程度会削弱GDP增长对贫困减少的效果，且撒哈拉以南非洲的贫困对增长的响应弹性明显低于其他地区。
Abstract This study explores the extent to which inequality affects the impact of income growth on the rates of poverty changes in sub-Saharan Africa (SSA) compared to non-SSA, based on an unbalanced panel of 86 countries over 1977–2004. For all three measures of poverty – headcount, gap, and squared gap – the impact of GDP growth on poverty reduction is a decreasing function of initial inequality. The impacts are similar in direction for SSA and non-SSA, so that within both regions there are considerable disparities in the responsiveness of poverty to income growth, depending on inequality. Nevertheless, the income–growth elasticity is substantially less for SSA, implying relatively small poverty-reduction response to growth.