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Supply-side reforms evaluation from adaptive learning perspective

On the background of 2007-08 financial crisis, the American Recovery and Reinvestment Act (ARRA) of 2009 proposed fiscal stimulus packages in response to a large economic downturn. Supply-side measures included in ARRA involve distortionary taxation reform such as labour income, or capital income tax. Some of them were implemented retroactively, while others will be engineered beyond 2009. However, the existing public finance literature evaluates and ranks various distortionary tax reforms according to their welfare consequences under rational expectation.

Building on the contribution of Evans et al. (2009) and Mitra et al. (2013), we aim to generalize their analysis of anticipated fiscal policy under learning by studying an economy featuring distortionary taxes. When agents use adaptive learning rules to forecast factor prices, our model predicts oscillatory dynamic responses to pre-announced permanent tax changes. Moreover, the case of distortionary taxation is particularly different with regard to the effects on impact and the volatility throughout the transition period. Confronted with this result, we then investigate the welfare implications of those striking differences in the dynamics of a pre-announced tax reform at the presence of several tax instruments. We find that tax reforms designed to improve welfare, do so to a much lower extent under learning compared to perfect foresight. Thus, the learning perspective on tax reforms provides fundamental different insights for benevolent policy makers.

Researchers: Shoujian Zhang, George Evans and Kaushik Mitra


Related CDMA Working Papers

1301 Emanuel Gasteiger and Shoujian Zhang "Anticipation, Learning and Welfare: the Case of Distortionary Taxation"

 

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