Temporary Income Taxes and Consumer Spending
估计临时性税收变化对消费的影响远小于永久性变化，发现临时减税的效果仅为永久减税的一半左右，退税效果更弱。
Both economic theory and casual empirical observation of the U.S. economy suggest that spending propensities from temporary tax changes are smaller than those from permanent ones, but neither provides much guidance about the magnitude of this difference. This paper offers new empirical estimates of this difference and finds it to be quite substantial. The analysis is based on an amendment of the standard distributed lag version of the permanent income hypothesis that distinguishes temporary taxes from other income on the grounds that the former are "more transitory." This amendment, which is broadly consistent with rational expectations, leads to a nonlinear consumption function. Though the standard error is unavoidably large, the point estimate suggests that a temporary tax change is treated as a 50-50 blend of a normal income tax change and a pure windfall. Over a 1-year planning horizon, a temporary tax change is estimated to have only a little more than half the impact of a permanent tax change of equal magnitude, and a rebate is estimated to have only about 38 percent of the impact.