JEFFREY R.
BROWN/AUSTAN GOOLSBEE Does the Internet Make Markets More Competitive? Evidence from the Life
Insurance Industry, in: Journal of Political Economy 110 (3), 2002, 481-507; FABIO
ANCARANI/VENKATESH SHANKAR, Price Levels and Price Dispersion Within and Across Multiple Retailer
Types: Further Evidence and Extensions, in: Journal of the Academy of Marketing Science 32 (2),
2004, 176-187.
123
Vgl. HAL R. VARIAN, Intermediate Economics – A Modern Approach, New York 2003.