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Public Economics Lectures Part 1: Introduction

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Kreiner and Verdelin 2009<br />

Consider a general model with non-linear income taxes (including<br />

lump sum)<br />

Q: What threshold should be used for PG’s in this setting?<br />

A: Depends on whether non-linear tax system is reoptimized when<br />

PG’s are funded<br />

If yes, then Samuelson rule correct again<br />

E.g. if public good benefits all equally, then simply raise lump sum tax<br />

and distributional problem is unchanged<br />

More generally, changes in optimal non-linear tax system will have<br />

second-order effects on welfare → can be ignored.<br />

Illustrates danger of Ramsey analyses<br />

<strong>Public</strong> <strong>Economics</strong> <strong>Lectures</strong> () <strong>Part</strong> 7: <strong>Public</strong> Goods and Externalities 69 / 138

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