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Public Economics Lectures Part 1: Introduction

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DFL Reweighting<br />

Example: 100 short, 100 tall pre-reform and 200 short, 100 tall<br />

post-reform<br />

Then put 2/3 weight on tall and 1/3 on short when calculating wage<br />

distribution after reform<br />

Compare reweighted post-reform distribution to pre-reform<br />

distribution to assess effect of expansion on wages<br />

Key assumption for causal interpretation of changes: selection on<br />

observables<br />

Here it is height; more generally, experience, age, demographics, etc.<br />

<strong>Public</strong> <strong>Economics</strong> <strong>Lectures</strong> () <strong>Part</strong> 2: Tax Incidence 74 / 142

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