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The Asian Games, Air Pollution and Birth Outcomes in South China: an Instrumental Variable Approach

Xiaoying Liu (), Huazhang Miao, Jere Behrman, Emily Hannum (), Zhijiang Liang and Qingguo Zhao ()
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Huazhang Miao: Guangdong Women and Children Hospital
Zhijiang Liang: Guangdong Women and Children Hospital
Qingguo Zhao: Family Planning Research Institute of Guangdong

PIER Working Paper Archive from Penn Institute for Economic Research, Department of Economics, University of Pennsylvania

Abstract: We estimate the causal effects of air pollution exposure on low birthweight, birth-weight, and prematurity risk in South China, for all expectant mothers and by maternal age group and child sex. We do so by exploiting exogenous improvement in air quality during the 2010 Guangzhou Asian Games, when strict regulations were mandated to assure better air quality. We use daily air pollution levels collected from monitoring stations in Guangzhou, the Asian Games host city, and Shenzhen, a nearby control city, between 2009 and 2011. We first show that air quality during the Asian Games significantly improved in Guangzhou, relative to Shenzhen. Further, using birth-certificate data for both cities for 2009 to 2011 and using expected pregnancy overlap with the Asian Games as an instrumental variable, we study the effects of three pollutants (PM10, SO2, NO2) on birth outcomes. Results show that 1) air pollutants significantly reduced average birthweight and increased preterm risk; 2) for birthweight, late pregnancy is most sensitive to PM10 exposure, but there is not consistent evidence of a sensitive period for other pollutants and outcomes; 3) for birthweight, babies of mothers who are at least 35 years old show more vulnerability to all three air pollutants; and 4) male babies show more vulnerability than female babies to PM10 and SO2, but birthweights of female babies are more sensitive than those of male babies to NO2.

Keywords: ambient air pollution; birthweights; preterm births; instrumental variable; China (search for similar items in EconPapers)
JEL-codes: I1 I12 I14 I18 Q51 Q52 Q53 Q54 (search for similar items in EconPapers)
Pages: 42 pages
Date: 2021-06-10
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