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Politicians, Taxes and Debt

Review of Economic Studies 2010 77(2), 806-840
The standard analysis of the efficient management of income taxes and debt assumes a benevolent government and ignores potential distortions arising from rent-seeking politicians. This paper departs from this framework by assuming that a rent-seeking politician chooses policies. If the politician chooses extractive policies, citizens throw him out of power. We analyse the efficient sustainable equilibrium. Unlike in the standard economy, temporary economic shocks generate volatile and persistent changes in taxes along the equilibrium path. This serves to optimally limit rent-seeking by the politician and to optimally generate support for the politician from the citizens. Taxes resembling those of the benevolent government are very costly since the government over-saves and resources are wasted on rents. Political distortions thus cause the complete debt market to behave as if it were incomplete. However, in contrast to an incomplete market economy, in the long run, taxes do not converge to zero, and under some conditions, they resemble taxes under a benevolent government.

Instrument-Based versus Target-Based Rules

Review of Economic Studies 2022 89(1), 312-345
We study rules based on instruments versus targets. Our application is a New Keynesian economy where the central bank has non-contractible information about aggregate demand shocks and cannot commit to policy. Incentives are provided to the central bank via punishment which is socially costly. Instrument-based rules condition incentives on the central bank’s observable choice of policy, whereas target-based rules condition incentives on the outcomes of policy, such as inflation, which depend on both the policy choice and realized shocks. We show that the optimal rule within each class takes a threshold form, imposing the worst punishment upon violation. Target-based rules dominate instrument-based rules if and only if the central bank’s information is sufficiently precise, and they are relatively more attractive the less severe the central bank’s commitment problem. The optimal unconstrained rule relaxes the instrument threshold whenever the target threshold is satisfied.

The Institutional Causes of China's Great Famine, 1959–1961

Review of Economic Studies 2015 82(4), 1568-1611
This article studies the causes of China's Great Famine, during which 16.5 to 45 million individuals perished in rural areas. We document that average rural food retention during the famine was too high to generate a severe famine without rural inequality in food availability; that there was significant variance in famine mortality rates across rural regions; and that rural mortality rates were positively correlated with per capita food production, a surprising pattern that is unique to the famine years. We provide evidence that an inflexible and progressive government procurement policy (where procurement could not adjust to contemporaneous production and larger shares of expected production were procured from more productive regions) was necessary for generating this pattern and that this policy was a quantitatively important contributor to overall famine mortality.