保护主义、规避与家庭福利：来自尼日利亚进口禁令的证据

Protectionism, evasion and household welfare evidence from Nigeria’s import bans

Journal of Public Economics · 2025 · Erhan Artuç、Guillermo Falcone、Guido Porto、Bob Rijkers

中文摘要

本文分析了尼日利亚进口禁令的福利影响，以及规避行为如何塑造这些影响。禁令并未得到有效执行，从而助长了非正规贸易。尽管如此，禁令的实施仍使消费者价格平均上涨了9.9%。然而，对于贸易政策较难执行的商品，价格上涨的幅度被大幅削弱。进口禁令不成比例地损害了较富裕家庭，而这些家庭也同样不成比例地从规避行为中获益。

Abstract

This paper analyzes the welfare impacts of import bans in Nigeria and how these impacts are shaped by evasion. Bans were not effectively enforced, thus fostering informal trade. The imposition of bans nonetheless increased consumer prices by 9.9 percent on average. However, price increases were substantially attenuated for goods for which trade policy is harder to enforce. Import bans disproportionately hurt richer households, who likewise disproportionately benefit from evasion.

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