2008년 9월 25일 목요일

Designing Benefit Rules for Flexible Retirement with or without Redistribution

자료: SSRN,  http://papers.ssrn.com/sol3/papers.cfm?abstract_id=646044


Designing Benefit Rules for Flexible Retirement with or without Redistribution

András Simonovits 
Hungarian Academy of Sciences - Institute of Economics


December 2004

CESifo Working Paper Series No. 1370 

Abstract:      
The traditional approach to flexible retirement (e.g. NDC) neglects the impact of asymmetric information on actuarial fairness (neutrality). The mechanism design approach (e.g. Diamond, 2003) gives up the requirement of neutrality and looks for a redistributive second-best benefit-retirement-age schedule. Trying to combine the two approaches, the present paper determines the neutral (redistribution-free) second-best solution. This neutral solution is, however, often Pareto-dominated by the redistributive one.

Keywords: flexible retirement, asymmetric information, actuarial fairness (neutrality), mechanism design

JEL Classifications: D82, D91, H55


※ 메모: 

Increasing life expectancy notwithstanding, people retire earlier nowadays than they did decades ago. A 


common explanatin for this phenomenon is that pension benefit rules are poorly designed in many 


countries(e.g. Gruber and Wise, eds., 1990), which, among other things, endangers the sustainabilit of 


social security systems. ...


Most of the literature assumed that the government and the individuals have the same information 


regarding life expectancies, and only the individuals' disutilities of labor are not known to the 


government(asymmetric information). Then there is a plausible benefit rule, called "actuarially fair" in 


the literature:


pay a life annuity equaling to the ratio of the lifetime contribution to the remaing life expectancy.



Fair systems have recently been introduced in several European countries(Sweden, Italy and Poland) under 


the name of "notionally defined contribution system(NDC)".


To avoid any confusion, we shall speak of a "neutral" scheme if the expected benefit is equal to the contribution for any type, and add the adjective "traditional" to the so-called fair systems.


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