South Korean Cost Sensitivity and Support for Nuclear Weapons

How do the costs of proliferation shape the public support for building nuclear weapons? Public opinion matters, especially in a democracy, because the masses can affect the nuclear policy choices that political elites make. Yet the existing literature on nuclear proliferation has not incorporated the public's cost sensitivity in the analysis. We therefore do not fully understand the sources of public attitudes toward nuclearization. By fielding a novel survey experiment in South Korea, I found that the economic and human costs of economic sanctions and preventive strikes dampen South Koreans' preferences for nuclear armament. Relative to the no-cost condition, economic and human costs reduce the support levels by 25.1% points and 19.4% points, respectively and in the case of combined costs the support decreases by 29.6% points. However, South Koreans still have relatively high levels of support for a nuclear arsenal even after the exposure to the costs of nuclearization. This implies that the rally effect resulting from hostile international responses may mitigate the negative cost effects to some degree. This study can contribute to the growing literature by providing new theoretical foundations and empirical results.