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Public Economics Lectures Part 1: Introduction

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Compensating Variation<br />

Measures utility at initial price level (u 0 )<br />

Amount agent must be compensated in order to be indifferent about<br />

tax increase<br />

CV = e(q 1 , u 0 ) − e(q 0 , u 0 ) = e(q 1 , u 0 ) − Z<br />

How much compensation is needed to reach original utility level at<br />

new prices?<br />

CV is amount of ex-post cost that must be covered by government to<br />

yield same ex-ante utility:<br />

e(q 0 , u 0 ) = e(q 1 , u 0 ) − CV<br />

<strong>Public</strong> <strong>Economics</strong> <strong>Lectures</strong> () <strong>Part</strong> 3: Effi ciency 30 / 105

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