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This article considers the interaction between two types of effort in lobbying contests: effort that improves the contestant's own performance (standard rent seeking), and effort that reduces particular rivals' performance (sabotage). Due to a positive externality, sabotage is a "small number" phenomenon. Sabotage may increase lobbying efforts and the dissipation rate in lobbying contests compared to a situation in which sabotage is not feasible. Copyright 2000 by Oxford University Press.
Kai A. Konrad (2000) studied this question.