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1. Removing the disincentives in Social Security for longer careers / Gopi Shah Goda, John B. Shoven, and Sita Nataraj Slavov -- 2. Notional defined contribution pension systems in a stochastic context : design and stability / Alan J. Auerbach and Ronald Lee -- 3. Reforming Social Security with progressive personal accounts / John Geanakoplos and Stephen P. Zeldes -- 4. Who chooses defined contribution plans? / Jeffrey R. Brown and Scott J. Weisbenner -- 5. The importance of default options for retirement saving outcomes : evidence from the United States / John Beshears ... [et al.] -- 6. Reducing the risk of investment-based Social Security reformed / Martin Feldstein -- 7. Pricing personal account benefit guarantees : a simplified approach / Andrew Biggs, Clark Burdick, and Kent Smetters -- 8. Reducing Social Security PRA risk at the individual level : life-cycle funds and no-loss strategies / James M. Poterba ... [et al.] -- 9. Changing progressivity as a means of risk protection in investment-based Social Security / Andrew A. Samwick -- 10. The decline of defined benefit retirement plans and asset flows / James M. Poterba, Steven F. Venti, and David A. Wise -- 11. Demographic change, relative prices, international capital flows, and their differential effects on the welfare of generations / Alexander Ludwig, Dirk Kru?ger, and Axel Bo?rsch-Supan -- 12. Is the U.S. population behaving healthier? / David M. Cutler, Edward L. Glaeser, and Allison B. Rosen.
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