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α: calibrated so average coauthorship-adjusted count equals average raw count
At the zero lower bound (ZLB), expectations about the future path of monetary or fiscal policy are crucial. We model expectations formation under level‐k$k$ thinking, a form of bounded rationality formalized by García‐Schmidt and Woodford (2019) and Farhi and Werning (2019), consistent with experimental evidence. This process does not lead to a number of puzzling features from rational expectations models, such as the reversal puzzle, or implausible large fiscal multipliers. Optimal monetary policy at the ZLB under level‐k$k$ thinking prescribes keeping the nominal rate lower for longer, but short‐run macro‐economic stabilization is less powerful compared to rational expectations.