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Public Economics Lectures Part 1: Introduction

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Baily-Chetty model: Second Best Solution<br />

u ′ (c l ) − u ′ (c h )<br />

u ′ (c h )<br />

= ε 1−e,b<br />

e<br />

This equation provides an exact formula for the optimal benefit rate<br />

Implementation requires identification of u′ (c l )−u ′ (c h )<br />

u ′ (c h )<br />

Three ways to identify u′ (c l )−u ′ (c h )<br />

u ′ (c h )<br />

empirically<br />

1 Baily (1978), Gruber (1997), Chetty (2006): cons-based approach<br />

2 Shimer and Werning (2007): reservation wages<br />

3 Chetty (2008): moral hazard vs liquidity<br />

<strong>Public</strong> <strong>Economics</strong> <strong>Lectures</strong> () <strong>Part</strong> 6: Social Insurance 50 / 207

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