Researchers have long been interested in whether environmental regulations discourage investment, reduce labour demand, or alter patterns of international trade. But estimating those consequences of regulations requires devising a means of measuring their stringency empirically. While creating...

The US has been a global leader in regulating local air pollution and a global laggard in regulating greenhouse gases (GHGs). For decades, critics of US policy have expressed fears that stringent US regulations on local air pollution would lead to pollution havens overseas. Prior research,...