We propose a new approach to test the full-information rational expectations hypothesis which can identify whether rejections of the arise from information rigidities. This approach quantifies the economic significance of departures from the and the underlying degree of information rigidity....

"We propose a new approach to test of the null of full-information rational expectations which is informative about whether rejections of the null reflect departures from rationality or full-information. This approach can also quantify the economic significance of departures from the null by...

"We study the effects of positive steady-state inflation in New Keynesian models subject to the zero bound on interest rates. We derive the utility-based welfare loss function taking into account the effects of positive steady-state inflation and show that steady-state inflation affects welfare...