"Indeed, it is fair to say that the acid deposition program ranks among the most spectacular success stories in all of American environmental regulation. Because the costs of the program have been so much lower than anticipated, the cost-benefit ratio seems especially good, with compliance costs of $870 million compared to estimates of annual benefits ranging from $12 billion to $78 billion—including reductions of nearly 10,000 premature deaths and more than 14,500 cases of chronic bronchitis"

— Cass Sunstein and Richard Thaler:Nudge Improving Decisions about Health, Wealth and Happiness.

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