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Abstract
Competing theories in industrial organization predict that more concentrated industries
will lead to a smaller and more efficient variety of products, or alternately, a larger and
less efficient array of products. This paper presents an empirical study of these competing
implications that estimates the impact of market concentration on new product
introductions in a panel of nine food processing industries over 1983 to 2004.
Controlling for industry-level unobservables (using fixed effects) and endogeneity of
industry market structure, we find that industry concentration promotes the introduction
of new products. Preliminary evidence also suggests that new product introductions spur
subsequent food industry mergers. Both conclusions are consistent with the “entry for
merger” theory of product variety wherein small firms introduce new products in
anticipation of profitable future mergers with concentrated firms.