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Public Economics Lectures Part 1: Introduction

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Special Case 1: Inverse Elasticity Rule<br />

Introducing elasticities, we can write formula as:<br />

N<br />

∑<br />

j=1<br />

τ j<br />

1 + τ j<br />

ε c ij = θ λ<br />

Consider special case where ε ij = 0 if i ̸= j<br />

Slutsky matrix is diagonal<br />

Obtain classic inverse elasticity rule:<br />

τ i<br />

1 + τ i<br />

= θ λ<br />

1<br />

ε ii<br />

<strong>Public</strong> <strong>Economics</strong> <strong>Lectures</strong> () <strong>Part</strong> 4: Optimal Taxation 18 / 121

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