@article{Madden2006,
	title = {Geographical separation of oligopolists can be very competitive},
	author = {Paul Madden},
	journal = {European Economic Review},
	month = {Oct},
	number = {7},
	pages = {1709--1728},
	url = {http://www.sciencedirect.com/science/article/B6V64-4HPD3Y6-1/1/3abbbc0a8f2f1fe2f9470b79516c7e46},
	volume = {50},
	year = {2006},
	biburl = {http://www.bibsonomy.org/bibtex/22a2b4e934cdb2839e023c450a92c4378/smicha},
	keywords = {Bertrand Differentiated product }
}