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金融扭曲的拉姆齐理论

A Ramsey Theory of Financial Distortions
Journal of Political Economy · 2024 · Marco Bassetto、Wei Cui

中文摘要

政府债务的回报率低于收益特征相似的资产。我们研究了如下情形下的最优债务管理与税收:政府无法直接向需要流动性的经济主体进行再分配,但除此之外可以使用一整套线性税收工具。最优的政府债务供给要求尽可能逐步缩小两类回报率之间的楔子,但税收政策可能形成一种反向作用力:只要金融摩擦仍具有约束力,即使对资本征税会扩大回报率差异,这样做也可能是最优的。

Abstract

The return on government debt is lower than that of assets with similar payoffs. We study optimal debt management and taxation when the government cannot directly redistribute toward the agents in need of liquidity but otherwise has access to a complete set of linear tax instruments. Optimal government debt provision calls for gradually closing the wedge between the returns as much as possible, but tax policy may work as a countervailing force: as long as financial frictions bind, it can be optimal to tax capital even if this magnifies the discrepancy in returns.
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