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Public Economics Lectures Part 1: Introduction

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Optimal Top Income Tax Rate<br />

In US tax return data, z m /¯z very stable above ¯z = $200K with<br />

z m¯z<br />

= 2<br />

With Pareto distribution (f (z) = a · k a /z 1+a ),<br />

⇒ τ ∗ TOP =<br />

1 − ḡ<br />

1 − ḡ + a · ¯ε<br />

Ex: ¯ε = 0.5, ḡ = 0.5, a = 2 ⇒ τ ∗ TOP = 33%<br />

a<br />

a−1 = z m¯z<br />

⇒ a = 2<br />

<strong>Public</strong> <strong>Economics</strong> <strong>Lectures</strong> () <strong>Part</strong> 4: Optimal Taxation 66 / 121

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