In 1989, the United Kingdom Monopolies and Mergers Commission (MMC) recommended measures that eventually led brewers to divest themselves of 14,000 public houses. The MMC claimed that their recommendations would lower retail prices and increase consumer choice. Since that time, however, retail prices have risen. This paper contains an econometric analysis of the transition period. The analysis is based on a model of the relationship between retail price and retail-organisational form that emphasises how exclusive-dealing clauses and strategic factors interact. In 1989, in an important decision, the United Kingdom Monopolies and Mergers Commission (MMC) recommended measures that eventually led brewers to divest themselves of 14,000 public houses. The MMC claimed that their recommendations would lower retail prices and increase consumer choice. There is considerable doubt, however, that their objectives were achieved. Indeed, since the time that the recommendations were implemented, retail prices have risen. It is not clear, however, if prices would have increased in the absence of divestiture. One goal of my research is to provide an answer to this question. The MMC's recommendations created an exceptional opportunity to assess the effects that different contractual arrangements have on retail prices. Indeed, one would like to investigate this relationship ceteris paribus. Unfortunately, however, the choice of vertical-market structure is normally endogenous, and it is impossible to condition on all of the factors that affect the contracting decision. In the UK beer industry, in contrast, the Government ordered changes in the type and terms of the contracts under which national brewers could operate their licensed premises. Increased separation between brewer and publican, therefore, was not due to changes in economic conditions. Moreover, some premises - the 'free' houses that were not owned by a brewer - were not affected by the Beer Orders. The existence of a control group facilitates the analysis by strengthening the conclusions that one can draw. In recent years, economists have moved away from simple theories of vertical
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