A welfare analysis of "junk" information and spam filters
This paper analyses the equilibrium effects of individual information filters. Information is modelled as advertisements which are distributed across a population of consumers with heterogeneous preferences. An advertisement that provides knowledge about a product with little or no utility for a consumer is considered junk. Filters are characterised by their level of tolerance. The quality of the filter is measured in terms of the share of useful items in the total set of items passing the filter. It is shown that in conditions of decentralised competition, multiple equilibria arise. A social optimum can be achieved by demanding each consumer to reject a certain percentage of advertisements, leaving the choice of what is rejected up to the consumer him/herself.
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- Dixit, Avinash K & Stiglitz, Joseph E, 1975.
"Monopolistic Competition and Optimum Product Diversity,"
The Warwick Economics Research Paper Series (TWERPS)
64, University of Warwick, Department of Economics.
- Dixit, Avinash K & Stiglitz, Joseph E, 1977. "Monopolistic Competition and Optimum Product Diversity," American Economic Review, American Economic Association, vol. 67(3), pages 297-308, June.
- Josef Falkinger, 2003.
CESifo Working Paper Series
1079, CESifo Group Munich.
- Falkinger, Josef, 2005. "Limited Attention as the Scarce Resource in an Information-Rich Economy," IZA Discussion Papers 1538, Institute for the Study of Labor (IZA).
- Josef Falkinger, 2008. "Limited Attention as a Scarce Resource in Information-Rich Economies," Economic Journal, Royal Economic Society, vol. 118(532), pages 1596-1620, October.
- Bagwell, Kyle, 2007. "The Economic Analysis of Advertising," Handbook of Industrial Organization, Elsevier.
- George J. Stigler, 1961. "The Economics of Information," Journal of Political Economy, University of Chicago Press, vol. 69, pages 213-213.
- S. A. Ozga, 1960. "Imperfect Markets Through Lack of Knowledge," The Quarterly Journal of Economics, Oxford University Press, vol. 74(1), pages 29-52.
- Gerard R. Butters, 1977. "Equilibrium Distributions of Sales and Advertising Prices," Review of Economic Studies, Oxford University Press, vol. 44(3), pages 465-491.
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