Impact of City Size and Employment Structure to Urban-industrial Agglomeration Economies and Its TFP —— Analysis Based on China's 10 Major Megalopolis

Based on the statistic data of China's 10 major megalopolises including 117 cities in 1998-2007,this paper empirically analyzes the impact of city size and employment structure to regional urban-industrial agglomeration economies and productivity.Results show: the location effect of urban agglomeration economy exists between megalopolises;The development of urban agglomeration economy has significant stage characteristics;Besides the incentive of technical progress,location endowment,industrial employment structure and city size also produce a significantly influence to urban total factor productivity;The urban agglomeration effect of Midwest region doesn't match their economic development level.