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  • John Beshears, James J. Choi, Joshua Hurwitz, David Laibson, and Brigitte C. Madrian, Insights in the Economics of Aging (University of Chicago Press, 2015), chap. 2, https://www.nber.org/books-and-chapters/insights-economics-aging/liquidity-retirement-savings-systems-international-comparison.

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What is the socially optimal level of liquidity in a retirement savings system? Liquid retirement savings are...

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