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Public Economics Lectures Part 1: Introduction

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Ramsey Model: Consumer Behavior<br />

Lagrangian for individual’s maximization problem:<br />

L = u(x 1 , .., x N , l) + α(wl + Z − (q 1 x 1 + .. + q N x N ))<br />

First order condition:<br />

u xi<br />

= αq i<br />

Where α = ∂V /∂Z is marginal value of money for the individual<br />

Yields demand functions x i (q, Z ) and indirect utility function V (q, Z )<br />

where q = (w, q 1 , .., q N )<br />

<strong>Public</strong> <strong>Economics</strong> <strong>Lectures</strong> () <strong>Part</strong> 4: Optimal Taxation 10 / 121

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