Zheng, Yuqing

May, 2019

By: Nemati, Mehdi; Zheng, Yuqing; Hu, Wuyang
Manufacturers have relied on environmental management systems to meet government environmental regulations, enhance their environmental performance, and reduce their impact on the environment. We investigate the impact of ISO 14001 certification on manufacturers’ toxic release levels. We applied the censored quantile instrumental variable estimator (CQIV) to data on U.S. transportation equipment manufacturing subsector facilities. Results show that for large firms, encouraging voluntary adoption of ISO 14001 might be an effective government strategy to reduce on-site pollution. However, for small firms and for the purpose of reducing off-site pollution, other economic incentives or regulations might be warranted.

January, 2019

By: Zheng, Yuqing; Dong, Diansheng; Burney, Shaheer; Kaiser, Harry M.
Sales taxes on either grocery food or restaurant food exist in almost every U.S. county. By combining county-level sales tax data with the USDA’s recent national household food acquisition and purchase survey, we examine how a food sales tax affects consumers’ expenditures on grocery and restaurant food.We find that a grocery tax reduces consumers’ grocery food expenditures and increases restaurant food expenditure and a restaurant food sales tax increases consumers’ grocery food expenditures. We also find no differential impacts from food sales taxes based on consumers’ income or participation status in the Supplemental Nutrition Assistance Program.