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Public Economics Lectures Part 1: Introduction

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Diamond 1975: Many-Person Model<br />

H individuals with utilities u 1 , .., u h , .., u H<br />

Aggregate consumption of good i is<br />

X i (q) = ∑ xi<br />

h<br />

h<br />

Govt. chooses tax rates τ i and a lump sum transfer T ≥ 0 to<br />

maximize social welfare:<br />

max W (V 1 , .., V H ) s.t.<br />

N<br />

∑ τ i X i ≥ E + T<br />

i=1<br />

Consider effect of increasing tax on good i by dτ i<br />

<strong>Public</strong> <strong>Economics</strong> <strong>Lectures</strong> () <strong>Part</strong> 4: Optimal Taxation 22 / 121

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