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Public Economics Lectures Part 1: Introduction

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Baily-Chetty Consumption-Based Formula<br />

γ ∆c<br />

c (b∗ ) ≈ ε 1−e,b<br />

e<br />

Intuition for formula: LHS is marginal social benefit of UI, RHS is<br />

marginal social cost of UI<br />

Extends to model where agent chooses N other behaviors and faces M<br />

other constraints, subject to some regularity conditions (Chetty 2006).<br />

Envelope conditions used above still go through with arbitrary choice<br />

vars.<br />

Empirical work on UI can essentially be viewed as providing estimates<br />

of the three key parameters (γ, ∆c<br />

c , ε).<br />

<strong>Public</strong> <strong>Economics</strong> <strong>Lectures</strong> () <strong>Part</strong> 6: Social Insurance 53 / 207

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