Does Information Disclosure Reduce Drinking Water Violations in the United States?
研究1996年美国《安全饮用水法》修正案要求供水系统向客户披露违规信息的效果，发现该要求显著减少了健康相关的饮用水违规，且效果持续至少四年。
The 1996 Safe Drinking Water Act Amendments required community water systems to disclose violations of drinking water standards to their customers in annual water quality reports. We explore the impact of three methods of disclosure on health-based drinking water quality violations using a matching and differences-in-differences framework with a national data set of drinking water quality violations from 1990 to 2001. We find that this information disclosure requirement reduced drinking water violations significantly and that the primary effect of disclosure on violations persists for at least four years after policy implementation. We find no evidence, however, that water systems trade these potentially more salient violation reductions for potentially less salient reductions in violations of other standards, nor do we find any evidence that water systems responded differentially to disclosure based on the demographic or political characteristics of their customers.