Optimal Choice of Product Scope for Multiproduct Firms under Monopolistic Competition / Robert Feenstra, Hong Ma.

Format:

Book

Author/Creator:

Feenstra, Robert.

Contributor:

National Bureau of Economic Research.

Ma, Hong.

Series:

Working Paper Series (National Bureau of Economic Research) no. w13703.

NBER working paper series no. w13703

Language:

English

Physical Description:

1 online resource: illustrations (black and white);

Place of Publication:

Cambridge, Mass. National Bureau of Economic Research 2007.

Summary:

In this paper we develop a monopolistic competition model where firms exercise their market power across multiple products. Even with CES preferences, markups are endogenous. Firms choose their optimal product scope by balancing the net profits from a new variety against the costs of "cannibalizing" their own sales. With identical costs across firms, opening trade leads to fewer firms surviving in each country but more varieties produced by each of those firms. With heterogeneous costs, the number of firms surviving in equilibrium is quite insensitive to the market size. When trade is opened, more firms initially enter, but the larger market size reduces the cannibalization effect and expands the optimal scope of products. As a result, the less efficient firms exit, and the larger market is accommodated by more efficient firms that produce more varieties per firm on average.

Notes:

Print version record

December 2007.