Behrens K, Duranton G, RobertNicoud F. Productive cities: Sorting, selection, and agglomeration[J]. Journal of Political Economy, 2014, 122(3): 507-553.
[11]
Bronzini R, Piselli P. Determinants of longrun regional productivity with geographical spillovers:The role of R&D, human capital and public infrastructure[J]. Regional Science and Urban Economics, 2009, 39(2): 187-199.
[12]
Browning H L, Singelmann J. The emergence of a service society:Demographic and sociological aspects of the sectoral transformation of the labor force in the U.S.A.[M]. Springfield: National Technical Information Service, 1975.
[13]
Coe D T, Helpman E. International R&D spillovers[J]. European Economic Review, 1995, 39(5): 859-887.
[14]
Combes P, Duranton G, Gobillon L, et al. The productivity advantages of large cities:Distinguishing agglomeration from firm selection[J]. Econometrica, 2012, 80(6): 2543-2594.
[15]
Duranton G, Puga D. From sectoral to functional urban specialisation[J]. Journal of Urban Economics, 2005, 57(2): 343-370.
[16]
Eswaran M, Kotwal A. The role of the service sector in the process of industrialization[J]. Journal of Development Economics, 2002, 68(2): 401-420.
[17]
Glaeser E L. Learning in cities[J]. Journal of Urban Economics, 1999, 46(2): 254-277.
[18]
Hansen B E. Threshold effects in nondynamic panels:Estimation, testing, and inference[J]. Journal of Econometrics, 1999, 93(2): 345-368.
[19]
Illeris S, Philippe J. Introduction:The role of services in regional economic growth[J]. The Service Industries Journal, 1993, 13(2): 3-10.
[20]
Jacobs W, Koster H R A, Van Oort F. Coagglomeration of knowledgeintensive business services and multinational enterprises[J]. Journal of Economic Geography, 2014, 14 (2): 443-475.
[21]
Markusen J R. Trade in producer services and in other specialized intermediate inputs[J]. American Economic Review, 1989, 79(1): 85-95.
[22]
World Bank. World development report 2009: Reshaping economic geography[M]. Washington, DC: World Bank Publications, 2009.