近幾年來,北京市城鎮居民的收入差距呈現逐漸擴大的趨勢,2003年,高收入組家庭人均可支配收入是低收入組家庭人均可支配收入的3.38倍。同時,居民的消費結構也産生了深層次的變化。按照凱因斯的理論,現期消費取決於現期收入,同時一些學者的研究也表明這個理論對於中國的消費狀況具有很強的解釋能力。因此,北京市城鎮不同收入組的居民,其消費總量和結構的差異必然與他們的收入差距有關。本文主要採用Panel Data模型,描述了城鎮不同收入組居民消費結構的變化,並以收入爲解釋變數,揭示他們在消費趨勢和傾向上的差異。研究發現,各收入組居民在消費習慣和傾向上有顯著差異,即隨著收入提高,消費總量和結構會發生明顯的變化。
Income disparities among urban residents of Peking have been growing in recent years. In 2003, the average annual income per person of the top 20% families is 3.38 times the bottom 20% families. Meanwhile, there have been great changes happened in the residents consumption. According to Keynes's theory, the current income decides the current consumption, and it also proves to be true in China by many researchers. Therefore, for urban residents of Peking who have different income, the consumption disparity is mainly because of their income disparities. This paper reveals the income and consumption disparities, using Panel Data model to prove the statement above.