题目: Reassessing the Firm Selection Effects of City Size: Evidence from Infrastructure Construction in China
牛毅，博士毕业于美国马里兰大学城市规划系，现任首都经济贸易大学国际经济管理学院副教授、硕士生导师，主要研究领域为城市经济学、区域经济学、房地产、城市规划与政策，主要论文发表于《Regional Science and Urban Economics》、《城市规划》等中外学术期刊。
This paper re-investigates whether larger cities eliminate more low-productivity firms, the so-called firm selection hypothesis. We exploit a huge boom of infrastructure construction in China during 1998- 2007. We find that firm selection is quite apparent when we compare large cities to small cities which are not connected by controlled-access highways; however, firm selection disappears once we compare large cities to small ones which are connected by highways. This result suggests that market size is dictated less by geography (city boundaries), but rather by transportation costs. The estimated effects of firm selection are robust to the potential endogeneity of highway construction. Moreover, evidence for firm selection is generally absent in inland provinces, perhaps because the market economy was relatively poorly developed in those areas during our study period.