The new Keynesian economics and the output-inflation trade-off

This letter reconsiders the empirical tests of the new Keynesian and new classical models performed by Ball Mankiw and Romer and Akerlof, Rose and Yellen. The original tests conform basically to cross-section analysis; we develop both time-series and pooled cross-section, time-series tests of these issues, using the methodology and results of Katsimbris. Our tests find at best weak support for either the new Keynesian or the new classical hypotheses.