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Public Economics Lectures Part 1: Introduction

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Goulder and Williams Formula<br />

Rank goods according to complementarity with labor (i.e.<br />

cross-partial<br />

dl<br />

d τ k<br />

)<br />

Find good at the mean level of<br />

dl<br />

d τ k<br />

A tax increase on this good has same effect as an increase in sales tax<br />

t on all consumption goods scaled down by s k<br />

Therefore cross-elasticity is equivalent to labor-supply elasticity times<br />

s k<br />

Labor supply elasticity η L<br />

suffi cient to calculate cross-elasticity for<br />

good that has “average” level of substitutability<br />

<strong>Public</strong> <strong>Economics</strong> <strong>Lectures</strong> () <strong>Part</strong> 3: Effi ciency 50 / 105

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