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Public Economics Lectures Part 1: Introduction

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Period<br />

Effect of Posting Tax­Inclusive Prices: Mean Quantity Sold<br />

TREATMENT STORE<br />

Control Categories Treated Categories<br />

Difference<br />

Baseline 26.48 25.17 ­1.31<br />

(0.22) (0.37) (0.43)<br />

Experiment 27.32 23.87 ­3.45<br />

(0.87) (1.02) (0.64)<br />

Difference 0.84 ­1.30 DD TS = ­2.14<br />

over time (0.75) (0.92) (0.64)<br />

Period<br />

CONTROL STORES<br />

Control Categories<br />

Treated Categories<br />

Difference<br />

Baseline 30.57 27.94 ­2.63<br />

(0.24) (0.30) (0.32)<br />

Experiment 30.76 28.19 ­2.57<br />

(0.72) (1.06) (1.09)<br />

Difference 0.19 0.25 DD CS = 0.06<br />

over time (0.64) (0.92) (0.90)<br />

Source: Chetty, Looney, and Kroft (2009)<br />

<strong>Public</strong> <strong>Economics</strong> <strong>Lectures</strong> () <strong>Part</strong> 2: Tax Incidence 28 / 142

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