A Price Theory of Vertical and Lateral Integration

Patrick Legros and Andrew Newman

The Quarterly Journal of Economics, 2013, vol. 128, issue 2, 725-770

Abstract: This article presents a perfectly competitive model of firm boundary decisions and study their interplay with product demand, technology, and welfare. Integration is privately costly but is effective at coordinating production decisions; nonintegration is less costly but coordinates relatively poorly. Output price influences the choice of ownership structure: integration increases with the price level. At the same time, ownership affects output, because integration is more productive than nonintegration. For a generic set of demand functions, equilibrium delivers heterogeneity of ownership and performance among ex ante identical enterprises. The price mechanism transmutes demand shifts into industry-wide reorganizations and generates external effects from technological shocks: productivity changes in some firms may induce ownership changes in others. If the enterprise managers have full title to its revenues, market equilibrium ownership structures are second-best efficient. When managers have less than full revenue claims, equilibrium can be inefficient, with too little integration. JEL Codes: D21, D23, D41, L11, L14, L22. Copyright 2013, Oxford University Press.

Date: 2013
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Working Paper: A Price Theory of Vertical and Lateral Integration (2009)
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