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Public Economics Lectures Part 1: Introduction

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Hausman: Non-linear Budget Constraints<br />

Hausman pioneered structural approach to estimating elasticities with<br />

non-linear budget sets<br />

Assume an uncompensated labor supply equation:<br />

l = α + βw(1 − τ) + γy + ɛ<br />

Error term ɛ is normally distributed with variance σ 2<br />

Observed variables: w i , τ i , y i , and l i<br />

Technique: (1) construct likelihood function given observed labor<br />

supply choices on NLBS, (2) find parameters (α, β, γ) that maximize<br />

likelihood<br />

Important insight: need to use “virtual incomes” in lieu of actual<br />

unearned income with NLBS<br />

<strong>Public</strong> <strong>Economics</strong> <strong>Lectures</strong> ()<strong>Part</strong> 5: Income Taxation and Labor Supply 22 / 217

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