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Public Economics Lectures Part 1: Introduction

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Diamond: Many-Person Optimal Tax Formula<br />

Solving yields formula for optimal tax rates:<br />

∂X j<br />

− ∑ τ j<br />

j<br />

∂q i<br />

= X i<br />

λ [λ − ∑ h β h xi<br />

h<br />

]<br />

X i<br />

With no redistributive tastes (Ramsey case): β h = α constant<br />

Obtain same formula as before (in terms of uncompensated elasticities)<br />

With redistributive tastes, β h lower for higher income individuals<br />

New term ∑ h β h xi<br />

h<br />

X is average social marginal utility, weighted by<br />

i<br />

consumption of good i<br />

<strong>Public</strong> <strong>Economics</strong> <strong>Lectures</strong> () <strong>Part</strong> 4: Optimal Taxation 24 / 121

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