Can better information lead to worse policy?

Congress thinks so:

WASHINGTON (Reuters) - A panel of U.S. lawmakers voted on Thursday to prohibit the federal government from "denying or rationing" medical care based on studies comparing medical drugs and devices.

The U.S. House of Representatives Energy and Commerce Committee passed the Republican-sponsored amendment, despite objections from Democrats. It is a potential win for drug and medical device makers, which argue that such comparison studies could favor cheaper treatments.