一、引言和文献综述自1978年至今,我国经济发展实现了巨大的飞跃,经济总量超出日本成为世界第二大经济体。然而贫富差距却不断加剧。我国的基尼系数一直呈现出不断扩大的趋势,从改革开放初期的0.28,到2005年上升到0.45,超出国际警戒线。;收入差距问题直接制约着宏观经济的可持续发展,对社会安定团结产生不良影响,研究城乡收入差距问题无疑具有很强的理论意义和现实意 I. Introduction and Literature Review Since 1978, China’s economic development has made a huge leap forward with its total economic output surpassing that of Japan as the second largest economy in the world. However, the gap between rich and poor has been increasing. China’s Gini coefficient has been showing a growing trend, from the early reform and opening up 0.28, to 2005 rose to 0.45, beyond the international warning line. ; The issue of income gap directly restricts the sustainable development of the macroeconomy, adversely affects social stability and unity, and there is no doubt that the study of the income gap between urban and rural areas is of great theoretical and practical significance