A new Federal Reserve research paper by Martin Bodenstein and Junzhu Zhao explores optimal monetary and fiscal policy under conditions of limited foresight. The study examines Barro’s random walk hypothesis, which posits distortionary labor taxes should follow a random walk regardless of government expenditure patterns. Researchers find that cognitive discounting, as described by Gabaix (2020), leads agents to perceive government debt as wealth, undermining the random walk result unless policymakers and the private sector exhibit specific, narrow combinations of limited rationality. Minor deviations from these parameters create stationary equilibrium dynamics tied to government debt’s wealth effect. Excessive future discounting by policymakers could lead to explosive dynamics. The findings apply to other limited foresight models, including Blanchard (1985), Weil (1989), and Woodford (2019). Keywords: monetary policy, fiscal policy, limited foresight. DOI: https://doi.org/10.17016/IFDP.2026.1444
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