Go to WRDS and choose Eventus.

For more information about using Eventus, see the Lippincott's Datapoints blog post Play on WRDS: EVENTUS for Event Studies.

Event Study, also in WRDS, allows users to measure the impact on the value of a firm resulting from an event. Users gain instant visualization of the effect of events on U.S. and global stock returns.

Note: WRDS requires a Wharton username and password.