We analyse positional effects in a monopoly market with vertical differentiation, comparing monopoly and social planning. The provision of quality under monopoly depends upon the relative size of positional effects and the hedonic evaluation of quality. An elitarian equilibrium where quality increases in the level of positional concern emerges under monopoly, only if the market is sufficiently rich. Under social planning, quality increases in the level of positional externality, independently of market affluency. As long as partial market coverage obtains under both regimes, the monopoly deadweight loss decreases as the positional externality becomes more relevant. Copyright 2002 by Blackwell Publishers Ltd/University of Adelaide and Flinders University of South Australia
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