Effects of air pollution on accounting conservatism

We examine the impact of air pollution on a firm's accounting policy conservatism. We hypothesize that, in response to risks associated with increased air pollution, firms apply more conservative accounting practices and utilize more conservative estimates in their reporting. Using a sample of Chinese firms, accounting conservatism measures, and a satellite-based air pollution metric, we confirm the validity of our hypothesis. Additional analysis suggests that the impact of air pollution on accounting policy conservatism is more salient for firms in high-pollution industries, firms under severe financial constraint, firms with higher environmental risk, and firms that receive high media coverage. Further, we document that air pollution does not significantly affect a firm's return on assets, year-on-year sales growth, or Tobin's Q measure. Hence, it is management's risk perception, not objective performance concern, that is driving accounting conservatism. Finally, specifically investigating accounting conservatism, we discover that, for firms with higher pollution levels, selling general and administrative expenses, liabilities provision, accrued expenses, and asset impairment loss are significantly higher.