Published online by Cambridge University Press: 06 July 2023
In the benchmark New Keynesian (NK) model, I introduce the real cost channel to study government spending multipliers and provide simple Markov chain closed-form solutions. This model departs fundamentally from most previous interpretations of the nominal cost channel by flattening the NK Phillips Curve in liquidity traps. At the zero lower bound, I show analytically that following positive government spending shocks, the real cost channel can make inflation rise less than in a model without this channel. This then causes a smaller drop in real interest rates, resulting in a lower output gap multiplier. Finally, I confirm the robustness of the real cost channel’s effect on multipliers using extensions of two models.
I would like to thank my advisor, Jordan Roulleau-Pasdeloup, for his extensive comments. I would also thank Chang Liu, Paul Gabriel Jackson, Denis Tkachenko, Yujie Yang as well as participants in NUS GRS and the CEC-NTU Joint Online workshop 2021 for their comments and suggestions.
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