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迟做总比不做好?量化PPP对疫情时期就业复苏的资金与流动性效应

Better late than never? Quantifying funding and liquidity effects of the PPP on pandemic-era employment recovery
Journal of Public Economics · 2026 · Olga Gorbachev、Maria J. Luengo-Prado、J.Christina Wang

中文摘要

本文通过区分短期流动性效应与更广泛的资金效应,考察薪资保护计划(PPP)如何在新冠疫情期间支持就业。利用县级数据,我们发现贷款发放延迟仅对城市中规模最小的企业产生了持续的负面影响。为识别资金本身的因果影响,我们构建了一个以疫情前小型企业工资总额占比为基础的工具变量。工具变量分析和企业层面分析表明,PPP资金广泛且大幅改善了企业存续和就业复苏,估计每增加一个工作年所需成本约为8.9万美元,这与其他大规模财政干预的成本一致。

Abstract

This paper examines how the Paycheck Protection Program (PPP) supported employment during the COVID-19 period by distinguishing between its short-term liquidity and broader funding effects. Using county-level data, we show that delays in loan disbursement had prolonged negative impacts only on the smallest urban businesses. To identify the causal impact of funding itself, we develop an instrument based on the pre-pandemic payroll share in small establishments. Instrumental-variable and firm-level analyses reveal that PPP funding improved business survival and employment recovery substantially and broadly, with an estimated cost of roughly $89,000 per job-year, consistent with other large-scale fiscal interventions.
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