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Public Economics Lectures Part 1: Introduction

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Double Dividend Debate<br />

Is there a double dividend from taxing computers?<br />

No. Already at Ramsey optimum → no effi ciency gain from raising<br />

taxes on PC’s and reducing taxes on other goods<br />

Only get single dividend of improving environment<br />

Obtain double dividend only if taxes on polluting good were initially<br />

too low from a Ramsey perspective.<br />

General lesson: separate externality and optimal second-best tax<br />

problems.<br />

Measure externalities and identify optimal corrective taxes without<br />

worrying about other aspects of tax system.<br />

<strong>Public</strong> <strong>Economics</strong> <strong>Lectures</strong> () <strong>Part</strong> 7: <strong>Public</strong> Goods and Externalities 114 / 138

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