Theories of international relations (IR) typically make predictions intended to hold across many countries. Nonetheless, existing experimental evidence testing the micro-foundations of IR theories relies overwhelmingly on studies fielded in the U.S. We argue that the nature of what constitutes a theory of IR makes it particularly important to know whether theories hold across countries. To examine the generalizability of IR experimental findings beyond the U.S., we implemented a pre-registered and harmonized multi-site replication study, fielding four prominent IR experiments in seven countries: Brazil, Germany, India, Israel, Japan, Nigeria, and the U.S. We find that all four experiments replicate in nearly all of the countries, a pattern likely due to treatment effect homogeneity. Our study not only reveals that findings from the U.S. are similar to findings from a wide range of countries, but offers important implications for the design and interpretation of future experimental research in IR.
The Generalizability of IR Experiments Beyond the U.S.
22 May 2023, Version 1