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增税还是削支?财政整顿中的边际税收与支出乘数

To Tax or To Ax? Marginal Tax and Spending Multipliers in Consolidations
NBER Working Papers · 2026 · Roberto Perotti、Luca Sala

中文摘要

我们提出边际累积乘数的概念,即在保持另一项财政工具不变的情况下,政府支出或税收对产出的影响,并将其应用于一个广为人知的面板数据集,该数据集涵盖16个国家在1978—2020年间的财政整顿事件。在基准设定中,我们估计两年期边际支出乘数为1.5,边际税收乘数接近0。我们还采用McKay和Wolf(2023)的政策反事实方法,估计出相近的乘数。在广泛的稳健性分析中,我们从未发现支出乘数低于1.3,也从未发现税收乘数高于−1。这些发现看似与现有大量财政乘数文献的结论相矛盾,后者通常发现税收乘数高于支出乘数。我们表明,一旦用适当的因子对文献中使用的财政变量进行缩放,这一矛盾便会消失。

Abstract

We introduce the notion of marginal cumulative multiplier — the effect of either government spending or taxation on output holding the other fiscal instrument constant — and apply it to a well known panel of consolidation episodes in 16 countries in the period 1978-2020. In our benchmark specification we estimate a marginal spending multiplier at two years of 1.5 and a marginal tax multiplier close to 0. We also estimate similar multipliers by applying the policy counterfactual method of McKay and Wolf (2023). In an extensive robustness analysis we never find spending multipliers below 1.3 or tax multipliers higher than -1. These findings are seemingly in contrast to those of much of the existing literature on fiscal multipliers, which typically finds higher tax than spending multipliers. We show that this contradiction disappears once the fiscal variables used in the literature are scaled by the proper factor.
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