What is a random walk? How is Hall’s random-walk model of consumption related to the life-cycle and permanent-income hypotheses?

Economics:
10th Edition
ISBN:9781285859460
Author:BOYES, William
Publisher:BOYES, William
Chapter9: Aggregate Expenditures
Section: Chapter Questions
Problem 7E
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What is a random walk? How is Hall’s random-walk model of consumption related to the life-cycle and permanent-income hypotheses? 

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