Do nonproliferation agreements constrain?

Bradley C Smith and William Spaniel
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Bradley C Smith: Department of Political Science, 5718Vanderbilt University
William Spaniel: Department of Political Science, 6614University of Pittsburgh

Journal of Peace Research, 2021, vol. 58, issue 6, 1163-1177

Abstract: One way nuclear agreements might keep signatories from proliferating is by constraining nuclear capacity. Theoretical work on nonproliferation often points to such constraints as an important driver of nonproliferation success. Some have argued that, absent sufficient constraint, states with the desire and capability to proliferate will do so. Faced with more costly routes to a weapon, states subject to technological constraint may abide by the terms of the deal. This perspective poses an important empirical question: do nonproliferation agreements result in significant technological constraint in practice? This article evaluates the empirical prevalence of constraints arising from nonproliferation deals. Doing so requires (1) providing an appropriate measure of nuclear proficiency and (2) developing an estimate of the counterfactual, no-agreement capacity of states that received such agreements. This study addresses both of these points. First, new data are gathered to estimate proficiency, improving upon existing measures in the literature. Second, the generalized synthetic control method is applied to estimate counterfactual proficiency levels for the recipients of agreements. With this approach, the constraining effects of deals the United States implemented with Japan, South Korea, and Taiwan and the Declaration of Iguaçu between Brazil and Argentina are evaluated. The findings indicate that the constraining effect of these nonproliferation agreements is minimal.

Keywords: measurement; nonproliferation; nuclear weapons; synthetic control (search for similar items in EconPapers)
Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:sae:joupea:v:58:y:2021:i:6:p:1163-1177

DOI: 10.1177/0022343320971355

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