Research On The Effect Of Producer Services Agglomeration On Export Product Quality

China's export trade has achieved great development since China joined the World Trade Organization in 2001. However, the promoting speed on China's export product quality is slow. At present, China's economy has stepped into the "new normal" phase, the development of economy is also facing many difficulties and challenges. Especially, our manufacturing industry is facing many problems, such as the environmental factors tension, increasing costs, lack of innovation capacity, excess capacity and so on. Under this background, improving quality and performance is generally considered to be the most effective way to achieve breakthrough for manufacturing enterprises. Manufacturing products account for the vast majority of the exports of our country, the improvement of its quality is also related to the improvement of our country's export quality and export competitiveness. So, how to improve the quality of our country's export products? This paper makes a deep discussion on this problem from the perspective of producer services agglomeration.First of all, the paper analyzes the influence mechanism of producer services agglomeration on the export product quality. On the basis of heterogeneity model of firm product quality, combined with the theory of specialization and diversification agglomeration, we can learn that the agglomeration of producer services affects the quality of export products through affecting the production efficiency, the production capacity of enterprises and the price of intermediate inputs. And the effects are different because of different agglomeration models. Based on this, two basic assumptions are proposed, namely, there is an U-shape relationship between the specialization of producer services agglomeration and export product quality and diversification agglomeration can promote the improvement of the quality of export products. Secondly, by using the location entropy sum index, improved H-H coefficient, product quality regression method, we calculate respectively the specialization of producer services agglomeration, diversification agglomeration and export product quality of China's 275 cities from 2007 to 2011. The results show that on the whole, specialization agglomeration showed a fluctuation state during the sample period, it increased at first and then decreased, then rose small and then dropped; Diversification agglomeration was in a steady growth trend before 2010, and then it was in a downtrend. Export product quality was shown as the N-shaped trend, it rose first and then dropped and then returned to the rise. At last, the empirical results show that there is an U-shape relationship between the specialization of producer services agglomeration and export product quality in all samples, and the current specialization agglomeration has a negative effect on export products quality. Diversification agglomeration is conducive to the upgrade of export product quality. In the discussion about different areas, the relationship between specialization agglomeration and export product quality is also an U-shape relationship in eastern region, the U-shape relationship is not significant in western region; the effect of diversification agglomeration is always positive in all areas.Based on this, we put forward some suggestions to improve the export product quality from the point of view of producer services agglomeration, such as promoting the development of producer services agglomeration, selecting agglomeration model rationally, taking full use of agglomeration effect, perfecting the system of agglomeration development and so on.