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Public Economics Lectures Part 1: Introduction

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Bergstrom-Blume-Varian Model: Crowd-out<br />

Let Z h = G h + t h denote total contribution of individual h.<br />

Can rewrite this as:<br />

max U(X h , Z h + Z −h )<br />

s.t. X h + Z h = Y h<br />

This is isomorphic to original problem ⇒ Z ∗ = G ∗<br />

Total public good provision is unchanged!<br />

Each person simply reduces voluntary provision by t h<br />

<strong>Public</strong> <strong>Economics</strong> <strong>Lectures</strong> () <strong>Part</strong> 7: <strong>Public</strong> Goods and Externalities 35 / 138

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