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Public Economics Lectures Part 1: Introduction

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DFL Reweighting<br />

Widely used method that generalizes propensity score reweighting<br />

Used to examine changes in distributions over time<br />

semi-parametrically, conditioning on observables<br />

Example: suppose wages are a function purely of height<br />

When EITC is expanded, average observed height of workers falls<br />

because less-skilled (shorter) people enter the labor force<br />

We want to identify how wage distribution changes for people of<br />

given height<br />

Solution: hold “fixed” height semi-parametrically by reweighting the<br />

distribution of wages ex-post to match heights ex-ante.<br />

<strong>Public</strong> <strong>Economics</strong> <strong>Lectures</strong> () <strong>Part</strong> 2: Tax Incidence 73 / 142

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