国际货币基金组织：诊断预期在开放经济中的重要性（英文版）

We develop and estimate a parsimonious New-Keynesian small open-economy model that incorporates Diagnostic Expectations (DE)—a behavioral alternative to Rational Expectations (RE). Under DE, agents systematically overreact to new information, generating additional endogenous volatility. Our empirical analysis provides robust support for the DE framework: it fits Canadian data significantly better than the nested RE benchmark and improves forecasts of key macroeconomic variables, including rea