On the Impact of Economic Policy Uncertainty on Haze Pollution——An Analysis Based on Cross-country Panel Data
With the panel data from 25 countries between 2003 and 2021,this paper employs a two-way fixed effects model,a heterogeneity model,a quantile regression model and a mediation model to study the impact of the economic policy uncertainty on haze pollution.Through theoretical analysis and empirical testing,the results indicate that an increase in economic policy uncertainty leads to a decrease in haze pollution.The heterogeneity tests and quantile regressions reveal that the impact of economic policy uncertainty on haze pollution varies from country to country,with a more significant effect observed in developing countries.Mediation effect tests suggest that urban agglomeration and technological progress significantly reduce haze pollution.A series of tests,including changing the measurement method for economic policy uncertainty indicators,adding control variables,truncating and using the 2SLS method to estimate the model confirm the robustness of the results.This paper also proposes policy recommendations to reduce haze pollution such as strengthening the supervision of polluting enterprises.
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