An Event Study is a research method used in finance and economics to assess the impact of a specific event on the value of a firm or asset. Researchers analyze stock price movements before and after the event to determine if there are significant changes that can be attributed to it. Common events studied include earnings announcements, mergers, or regulatory changes. The primary goal of an event study is to isolate the effect of the event from other market influences. By comparing actual stock returns to expected returns, analysts can gauge how much the event has affected investor perceptions and market behavior, providing insights into the event's significance.