Allies with Benefits: US Effect on European Demand for Military Expenditures

This paper examines the security relationship between the US and Europe, focusing on potential spillin effects of US military expenditures on European demand for military expenditures during the early twenty-first century. The goal is to test whether or not European states view US expenditures as a complement or as a substitute to their own military expenditures. Past work in this area has found mixed results concerning the effect of US military expenditures, but focus strictly on the spillins within a formal alliance, specifically NATO, and use a time series dominated by Cold War dynamics. This study differentiates itself by accounting for both US total military expenditures and its regional expenditures through incorporation of US military base and personnel deployments across Europe. Additionally, this paper uses government revenue in its estimation to mitigate potential endogeneity. Findings using Arellano–Bond dynamic panel analysis suggest that there is a strong probability of substitution among European states.