China's environmental regulators have sought to reduce the Yangtze River's water pollution. We document that this …, the regulation has focused on reducing one dimension of water pollution called chemical oxygen demand (COD). Thus, local …

Using the most comprehensive data file ever compiled on air pollution, water pollution, environmental regulations, and … air pollution regulations were effective at reducing ambient concentrations of particulate matter, sulfur dioxide, and … nitrogen dioxide. The most successful air pollution regulation is associated with a modest and statistically insignificant …

This paper explores the empirical effects of decentralization on environmental quality by studying water pollution in … rivers around the world. It examines the level of pollution and variation in pollution across jurisdictions within a country …, for both a local and a regional pollutant. Federal countries exhibit greater interjurisdictional variation in pollution …

This article proposes and evaluates four hypotheses about US pollution and environmental policy over the last half … century. First, air and water pollution have declined substantially, although greenhouse gas emissions have not. Second …, environmental policy explains a large share of these trends. Third, much of the regulation of air and drinking water pollution has …

may have benefits, it may also have costs with pollution spillovers across states. This paper estimates these costs …

theoretical and empirical research to evaluate the effects of such reforms on tax revenue, pollution emissions, economic …