. Second, the filter includes some simple economic theory—specifically the structure of the filter relates the output gap to slack in the labor market and changes in inflation. Third, the filter produces more robust real-time estimates of potential and the output gap relative to estimates from an HP filter, though a certain amount of uncertainty in real-time estimates is unavoidable. Fourth, due to the minimal data requirements (GDP, inflation, and unemployment), the filter can be applied to a broad range of countries. Finally, the results can be conditioned in a