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Public Economics Lectures Part 1: Introduction

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Double Dividend Debate<br />

Claim: gas tax has two “dividends”<br />

1 discourages pollution, raising social welfare<br />

2 allows govt. to reduce other distortionary taxes, improving effi ciency.<br />

True if we are at a corner where revenue req. is below level what is<br />

generated by optimal Pigouvian taxes.<br />

More realistic case: already at a Ramsey-tax interior optimum.<br />

Suppose we discover that production of computers generates negative<br />

externality<br />

<strong>Public</strong> <strong>Economics</strong> <strong>Lectures</strong> () <strong>Part</strong> 7: <strong>Public</strong> Goods and Externalities 113 / 138

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