3Baumol W J. On the proper cost tests for natural monop- oly in a muhiproduct industry [ J ]. The American Eco- nomic Review, 1977 ( 3 ) : 809-822.
4Douglas G W. Price regulation and optimal service stand- ards: The taxicab industry[J]. Journal of Transport Eco- nomics and Policy, 1972,6(2) : 116-127.
5Teal R F, Berglund M. The impacts of taxicab deregula- tion in the USA[ J ]. Journal of Transport Economics and Policy, 1987,21 ( 1 ) : 37-56.
8Decision Adopting Rules and Regulations to Protect Public Safety While Allowing New Entrants to the Transportation Industry[R].California Public Utilities Commission.Retrieved 26 Nov 2013.
9Section 2 Requirement for London Operatorlicense,Private Hire Vehicles(London)Act 1998.
10Moreno,I.Rules for Uber,Lyft to become state law in Colorado[N].The Seattle Times,May 20,2014.