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Public Economics Lectures Part 1: Introduction

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Baily-Chetty model: First Best Problem<br />

In first best, there is no moral hazard problem<br />

To solve for FB, suppose government chooses b and e joints to<br />

maximize agent’s welfare:<br />

max e(A + w h − t) + (1 − e)u(A + w l + b) − ψ(e)<br />

b,e<br />

s.t. t = 1 − e b<br />

e<br />

Solution to this problem is u ′ (c e ) = u ′ (c u ) ⇒ full insurance<br />

<strong>Public</strong> <strong>Economics</strong> <strong>Lectures</strong> () <strong>Part</strong> 6: Social Insurance 40 / 207

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