Air Pollution and Defensive Expenditures: Evidence from Particulate-Filtering Facemasks

51 Pages Posted: 3 Nov 2014 Last revised: 22 Jul 2017

See all articles by Junjie Zhang

Junjie Zhang

Duke Kunshan University; Duke University

Quan Mu

Peking University

Date Written: July 20, 2017

Abstract

Rational individuals take preventive measures to avoid costly air pollution exposure. This paper provides new empirical evidence of pollution avoidance that Chinese urban residents purchase particulate-filtering facemasks against ambient air pollution. The analysis is conducted with detailed and comprehensive data available on daily facemask purchases and air quality that became available only very recently. We find that this transitory air pollution avoidance behavior exhibits dynamics and nonlinearities, with significant increases of facemask purchases during extreme pollution episodes. The daily model shows that a 100-point increase in Air Quality Index (AQI) increases the consumption of all masks by 54.5 percent and anti-PM2.5 masks by 70.6 percent. The estimates from the aggregated model with flexible pollution levels are used to simulate the benefit of air quality improvement. If 10 percent of heavy pollution days were eliminated, the total savings on facemasks alone would be approximately 187 million USD in China. This result suggests that reducing the occurrence of "airpocalypse" events represents a significant opportunity to improve social welfare. Nevertheless, our estimates are likely only the lower bound of the benefit of clean air because facemasks can only partially reduce the negative health effects of air pollution and the costs of other avoidance behaviors are not included.

Keywords: air pollution, defensive expenditures, facemasks, China

JEL Classification: Q53, I12, C23

Suggested Citation

Zhang, Junjie and Mu, Quan, Air Pollution and Defensive Expenditures: Evidence from Particulate-Filtering Facemasks (July 20, 2017). Available at SSRN: https://ssrn.com/abstract=2518032 or http://dx.doi.org/10.2139/ssrn.2518032

Junjie Zhang (Contact Author)

Duke Kunshan University ( email )

No. 8 Duke Avenue
Kunshan, 215316
China
+86 512 36657068 (Phone)

HOME PAGE: http://junjiezhang.org

Duke University ( email )

No. 8 Duke Avenue
Kunshan, 215316
China
+86 512 36657068 (Phone)

HOME PAGE: http://junjiezhang.org

Quan Mu

Peking University ( email )

No. 38 Xueyuan Road
Haidian District
Beijing, Beijing 100871
China

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