中文摘要：

以收入差距与经济增长或收入差距与城市化率关系的两个倒＂U＂形假说为前提,在三者之间的面板协整方程中同时引入经济增长和城市化率的一次项和二次项作为城乡收入差距的解释变量进行检验和估计。结果表明：三者之间存在长期协整关系,经济增长始终会加剧城乡收入差距,恶化作用随着时间递增。城市化程度的偏效应由样本期初的有正有负到期末全部为负,表明城市化程度提高有利于缩小城乡收入差距。这表明,单纯追求经济增长只能加剧城乡收入差距。在保持一定的经济增长率以保证新增劳动力就业的前提下,大力加快城市化进程,用城市化对收入差距的抑制效应抵消经济增长对它的加剧效应,能够促进城乡融合及社会和谐发展。

英文摘要：

Assuming that there is an inverted U-shaped relation between income disparity and economic growth as well as between income disparity and urbanization rate, we empirically test their relationship with the level and square of PGDP and urbanization rate as explanatory variables for income disparity. We find out that there is a long-term co-integration relation among the three. Economic growth always enlarges the income disparity with the deteriorating effect rising with time. Though the marginal effect of urbanization is ambiguous in the beginning, it turns out to be negative in the end, indicating that urbanization reduces income disparity. Purely pursuing economic growth enlarges income disparity. While, maintaining certain economic growth rate to provide work opportunities for newly increased labor force, we must accelerate the urbanization process so that the narrowing effect of urbanization will neutralize the enlarging effect of economic growth on income disparity and lead to urban-rural integration and harmonious social development.