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Public Economics Lectures Part 1: Introduction

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Equivalent Variation<br />

Measures utility at new price level<br />

Lump sum amount agent willing to pay to avoid tax (at pre-tax prices)<br />

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

EV is amount extra that can be taken from agent to leave him with<br />

same ex-post utility:<br />

e(q 0 , u 1 ) + EV = e(q 1 , u 1 )<br />

<strong>Public</strong> <strong>Economics</strong> <strong>Lectures</strong> () <strong>Part</strong> 3: Effi ciency 31 / 105

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