Multi-country event-study methods

The first simulation evidence of event-study test performance in multi-country non-US samples is provided, showing the nonparametric rank and generalized sign tests are more powerful than two common parametric tests, especially inmulti-day windows.

Abstract

We provide the first simulation evidence of event-study test performance in multi-country non-US samples. The nonparametric rank and generalized sign tests are more powerful than two common parametric tests, especially in multi-day windows. The two nonparametric tests are mostly well specified, but neither is perfectly specified in all situations. The parametric standardized cross-sectional test can provide a useful robustness check but is less powerful than the nonparametric tests and rejects too often in single-market samples and when firm-specific events affect the market index. Local-currency market-model abnormal returns using national market indexes are sufficient.