7Akehurst,G. (2008),"What do we really know about serv-ices? "Service Business 2(1) :1 -15.
8Baumol,W. J. ( 1967 ),” Macroeconomics of unbalancedgrowth: The anatomy of urban crisis", The American E-conomic Review 57(3) :415 - 426.
9Cass,D. (1965),"Optimum growth in an aggregative modelof capital accumulation”,The Review of Economic Studies32(3):233-240.
10Chow Lin ( 2002 ) , " Accounting for economic growth inTaiwan and China's Mainland: A comparative analysis”,Journal of Comparative Economics 30(3) :507 -530.
