Deterrence: The Elusive Dependent Variable

Abstract

Empirical analyses of deterrence have paid insufficient attention to the validity and reliability of the data used to test the central propositions of theories of deterrence. This article examines two prominent studies of immediate extended deterrence that do not deal adequately with the problems inherent in constructing a valid data set for quantitative analysis. The problems are particularly acute in the testing of theories of deterrence because of the difficulties in identifying cases of deterrence success and of inferring the intentions of would-be challengers. Our analysis explores these problems and suggests ways of testing theories of deterrence that can reduce the threats to valid inference.