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Public Economics Lectures Part 1: Introduction

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Mroz 1987: Setup and Results<br />

Uses background variables as “credibly exogenous ”instruments<br />

Parents’education, wife’age, education polynomials<br />

Tests validity of labor market experience, average hourly earnings, and<br />

previous reported wages<br />

Rejects validity of all three<br />

Shows that earlier estimates are highly fragile and unreliable<br />

Contributed to emerging view that policy variation (e.g., taxes) was<br />

necessary to really identify these elasticities properly<br />

<strong>Public</strong> <strong>Economics</strong> <strong>Lectures</strong> ()<strong>Part</strong> 5: Income Taxation and Labor Supply 91 / 217

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