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Public Economics Lectures Part 1: Introduction

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First Best if G is Private<br />

To identify Pareto effi cient outcomes, solve:<br />

max ∑ β h U h (X h , G h )<br />

h<br />

s.t. F (∑<br />

h<br />

X h , ∑ G h ) ≤ 0 [λ]<br />

h<br />

Equivalent to max U 1 s.t. U h ≥ U0 h for all h ≥ 0 and F ≤ 0.<br />

Lagrangian:<br />

L = ∑ β h U h − λF<br />

First order conditions<br />

[X h ] : β h U h X = λF X<br />

[G h ] : β h U h G = λF G<br />

<strong>Public</strong> <strong>Economics</strong> <strong>Lectures</strong> () <strong>Part</strong> 7: <strong>Public</strong> Goods and Externalities 9 / 138

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