Economies of diversification: A generalization and decomposition of economies of scope

The paper investigates the benefits of diversification for a multi-product firm. It examines economies of diversification, reflecting the cost reduction associated with producing outputs in an integrated firm (compared to specialized firms). The analysis applies under complete specialization as well as partial specialization (when firms are not fully specialized and/or when the specialization scheme does not cover all outputs). It decomposes economies of diversification into four additive parts: a part measuring complementarity among outputs; a part reflecting economies of scale; a part reflecting convexity; and a part reflecting the role of fixed cost. This new decomposition appears useful in investigating how scale effects, complementarity effects, and convexity effects can contribute to economies of scope in a multiproduct firm and helps generate valuable insights into the economics of specialization for multiproduct firms.

[1]  Hervé Leleu,et al.  A linear programming framework for free disposal hull technologies and cost functions: Primal and dual models , 2006, Eur. J. Oper. Res..

[2]  Tai-Hsin Huang,et al.  Measuring scale and scope economies in multiproduct banking? A stochastic frontier cost function approach , 2001 .

[3]  W. Baumol,et al.  Contestable Markets and the Theory of Industry Structure , 1982 .

[4]  Gérard Gaudet,et al.  Complementarity, coordination and compatibility: The role of fixed costs in the economics of systems , 1995 .

[5]  D. M. Topkis.  Supermodularity and Complementarity , 1998 .

[6]  A. Arora,et al.  COMPLEMENTARITY AND EXTERNAL LINKAGES: THE STRATEGIES OF THE LARGE FIRMS IN BIOTECHNOLOGY* , 1990 .

[7]  Paul R. Milgrom,et al.  The Economics of Modern Manufacturing: Technology, Strategy, and Organization , 1990 .

[8]  Ian E. Gorman.  Conditions for Economies of Scope in the Presence of Fixed Costs , 1985 .

[9]  H. Varian.  The Nonparametric Approach to Production Analysis , 1984 .

[10]  Gary D. Ferrier,et al.  Economies of diversification in the banking industry: A frontier approach , 1993 .

[11]  M. Dietsch,et al.  Economies of scale and scope in French commercial banking industry , 1993 .

[12]  Scott J. Callan,et al.  Economies of Scale and Scope: A Cost Analysis of Municipal Solid Waste Services , 2001, Land Economics.

[13]  Nejat Anbarcı,et al.  Inter-firm complementarities in R&D: a re-examination of the relative performance of joint ventures , 2002 .

[14]  J. Fredericks Volkwein,et al.  The Cost Structure of American Research Universities , 1991 .

[15]  R. Willig,et al.  Economies of scope , 1981 .

[16]  Alban Thomas,et al.  The Structure of Municipal Water Supply Costs: Application to a Panel of French Local Communities , 2001 .

[17]  James J. Heckman,et al.  A Test for Subadditivity of the Cost Function with an Application to the Bell System , 1986 .

[18]  Jean-Paul Chavas,et al.  Spatial allocation and the shadow pricing of product characteristics , 1998 .

[19]  Arie Beresteanu.  Nonparametric Analysis of Cost Complementarities in the Telecommunications Industry , 2002 .

[20]  Michael Aliber,et al.  AN ANALYSIS OF ECONOMIC EFFICIENCY IN AGRICULTURE: A NONPARAMETRIC APPROACH , 1993 .

[21]  T. Klette.  R&D, Scope Economies, and Plant Performance , 1996 .

[22]  Peter Welzel,et al.  Technology and Cost Efficiency in Universal Banking A “Thick Frontier”-Analysis of the German Banking Industry , 1998 .

[23]  W. Wilson,et al.  Telecommunications deregulation and subadditive costs: Are local telephone monopolies unnatural? , 2001 .

[24]  William J. Baumol,et al.  On the Proper Cost Tests for Natural Monopoly in a Multiproduct Industry , 1977 .

[25]  E. Cohn,et al.  Institutions of Higher Education as Multi-product Firms: Economies of Scale and Scope , 1989 .

[26]  Allen N. Berger,et al.  Competitive viability in banking: Scale, scope, and product mix economies , 1987 .

[27]  Scott J. Savage,et al.  Economies of Scale and Scope in Australian Telecommunications , 2001 .

[28]  Cristiano Antonelli,et al.  Externalities and complementarities in telecommunications dynamics , 1993 .

[29]  D. Prior,et al.  Technical efficiency and scope economies in hospitals , 1996 .

[30]  Jean-Paul Chavas,et al.  Measurement and Sources of Economies of Scope: A Primal Approach , 2007 .