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Public Economics Lectures Part 1: Introduction

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Two Views on the Rise in DI<br />

Trend has continued since 1980s: DI share of non-elderly adults rose<br />

from 3.1% in 1984 to 5.4% in 2000<br />

One perspective on the rise: moral hazard from a lenient system that<br />

leads to ineffi ciency<br />

Another perspective: program is now helping more needy people who<br />

have high disutilities of work<br />

Empirical work attempts to distentangle these two views to some<br />

extent<br />

<strong>Public</strong> <strong>Economics</strong> <strong>Lectures</strong> () <strong>Part</strong> 6: Social Insurance 146 / 207

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