二阶益贫式增长的绝对与相对同步测定方法构建

Measuring Second-order,Absolute and Relative Pro-poor Growth

本文首先尝试构建一个二阶益贫式增长的绝对与相对同步测定函数;所谓二阶益贫式增长,是指相较整个穷人群体、更关注"穷人中的穷人"的增长,而同步测定通过将绝对益贫与相对益贫相结合,恰好能够弥补二者各自的缺陷。其次,本文对该函数所具备的优良属性进行证明。最后,运用所构建的函数对中国及其各省市的益贫式增长进行测定,并将测定结果与相对益贫式增长的结果进行比较。研究发现,中国及各省市的农村与城镇地区在大部分年份均未实现二阶同步益贫,且实现同步益贫的会被测定为实现相对益贫,反之则不成立;与相对测定函数相比,同步测定函数不仅更加严格,也更能反映益贫情况的波动。

This paper firstly builds a second-order pro-poor growth function for jointly measuring the absolute and relative pro-poorness of growth. A second-order pro-poor growth focuses on＂the poorer in the poor＂and by combining absolute and relative pro-poor growth,the joint measurement makes up for both defects. Second,the authors prove that this function has several fine properties. Finally,the authors apply the function to China and its provinces,and compare the results to the second-order,relative pro-poor＇s judgment. In most years,rural and urban areas in each province of China haven＇t witnessed second-order,absolute and relative pro-poor growth. In addition,compared to relative pro-poor method,this function is stricter and better in describing the volatility of pro-poor situations.