员 The estimated change in life expectancy The estimated change in TSP (and height ofthe brace)just north of the (and height of the brace)just Huai River is-5.04 years and is statistically north of the Huai River is significant(95%C1:881,-127). 247.5μg and is statistically significant 95%C:114.5.380.6). 导 景 等 8- -20 -10 0 10 20 -20 -10 0 10 20 Degrees North of the Huai River Boundary Degrees North ofthe Huai River Boundary TSP in South TSP in North Fitted Values from Cubic in Latitude O L.E.in South O L.E in North Fitted Values from Cubic in Latitude ◆Chen et al(20l3)PNAS Yi Bo +BiTSPi+others 8j, IV method to estimate the true influence Econometrics 15-Zhuxi 13Chen et al (2013) PNAS  𝑌𝑗 = 𝛽0 + 𝛽1𝑇𝑆𝑃𝑗 + 𝑜𝑡ℎ𝑒𝑟𝑠 + 𝜀𝑗 ,  IV method to estimate the true influence Econometrics 15 - Zhuxi 13