Ex-post refers to something that is analyzed or evaluated after the fact, based on actual outcomes or events that have already occurred. This term is commonly used in the context of economic analysis, policy evaluation, or research where conclusions are drawn from real data and historical performance.
For example, in economic studies, ex-post analysis looks at the actual impact of a policy or event after it has been implemented, examining the real effects on variables like inflation, employment, or GDP growth.
On the other hand, Ex-Ante refers to predictions or assessments made before the event occurs, based on forecasts or assumptions about future conditions. Ex-ante analysis is typically used for planning, risk assessment, or decision-making, as it helps to estimate potential outcomes before they actually unfold.
For instance, ex-ante evaluations might include economic forecasts about the effects of a new policy or investment, based on current trends and expected future conditions. These predictions are used to guide decisions but may not always align with actual results, which is where ex-post analysis comes in.