Social Security and Growth in an Altruistic Economy

This paper studies the macroeconomic impact of private and public intergenerational transfers in the presence of endogenous growth. It focuses on two-sided altruism implying that individuals have both a motive to make gifts to their parents and a motive to leave bequests to their children. The growth effects of social security depend on whether children are making gifts to their parents or parents are leaving bequests to their children. Which of the transfers is operative, in turn, depends on the size of social security benefits. Social security is legislated endogenously. The introduction of a social security program which definitely reduces per capita income growth and harms future generations is contemplated by altruistic individuals even if non-altruistic individuals disapprove it.     

Self-enforcing exchange among generations: Implications for consumption and mobility

A three-generation OLG model with one-directional altruism and two-directional intra-family transfers is presented. Adults invest in their children's education and make transfers to their elderly parents. However, due to lack of altruism, adults with high earnings do not share consumption equally with their elderly parents but spend a larger share of their earnings on own consumption and on their children's education. This allows the model to be consistent with three empirical observations that are difficult to reconcile with traditional altruistic frameworks of intergenerational social interactions and mobility: (i) consumption is not perfectly shared between members of an extended family, (ii) consumption is not equally persistent over the lifecycle as across generations, and (iii) the intergenerational persistence of earnings is particularly high at the top end of the earnings distribution.     

Intergenerational transfers,demographic transition,and altruism: Problems in developing Asia

This paper develops a three‐period overlapping‐generations model where middle‐aged agents care about not only their own lifetime utility but also their old parents' and children's well‐being. The doubly altruistic agents choose amounts of intergenerational transfers to their old parents and children as well as private savings. The government specifies amounts of public transfers from working adults to the dependents. The model also takes the effects of demographic transition on the burdens of supporting the elderly and children into account. Using 23 countries' data from the National Transfer Accounts (NTA ), we estimate the degrees of filial and parental altruism and adjust them for their respective life expectancy and fertility rates. The findings suggest that people in developing countries are more parentally altruistic than those in developed ones while the adjusted degree of filial altruism tends to be low in developing Asia. Our welfare analyses reveal that the developing Asian countries must introduce more comprehensive public welfare programs for the elderly to maximize social welfare. Moreover, their low adjusted degree of filial altruism may trap the developing Asian countries at the low levels of public old‐age support and social welfare as the further demographic transition ensues.     

How to identify trust and reciprocity

This paper uses a three-games (or triadic) design to identify trusting and reciprocating behavior. A large literature on single-game trust and reciprocity experiments is based on the implicit assumption that subjects do not have altruistic or inequality-averse other-regarding preferences. Such experimental designs test compound hypotheses that include the hypothesis that other-regarding preferences do not affect behavior. In contrast, experiments with the triadic design do discriminate between transfers resulting from trust or reciprocity and transfers resulting from other-regarding preferences that are not conditional on the behavior of others. Decomposing trust from altruism and reciprocity from altruism or inequality aversion is critical to obtaining empirical information that can guide the process of constructing models that can increase the empirical validity of game theory.     

Capital Accumulation in an Economy with Dynasties and Uncertain Lifetimes

This paper studies how the lack of an annuities market affects savings behavior and intergenerational transfers in a dynastic overlapping generations economy. I find that the answer to this question depends crucially on altruism. On the one hand, if the altruistic bequest motive is operative, then the lack of annuity markets enhances capital accumulation. On the other hand, if the altruistic bequest motive is not operative, the absence of annuity markets can either increase or decrease aggregate savings. I characterize under which conditions capital accumulation is enhanced. I also prove that an overlapping generations economy with altruism and uninsurable lifetime risk faces capital overaccumulation relative to the modified Golden Rule. The efficient allocation corresponding to the modified Golden Rule can be decentralized as a competitive equilibrium by a pay-as-you-go social security system, and this can only be done if individuals are altruistic.     

Opting out and topping up reconsidered: Informal care under uncertain altruism

We study the design of public long‐term care (LTC) insurance when the altruism of informal caregivers is uncertain. We consider non‐linear policies where the LTC transfer depends on the level of informal care, which is assumed to be observable, while children's altruism is not. Our policy encompasses two policies traditionally considered in the literature: topping up policies consisting of a transfer independent of informal care, and opting out policies entailing a positive transfer only if children fail to provide care. We show that both total and informal care should increase with the children's level of altruism. This is obtained under full and asymmetric information. Public LTC transfers, on the other hand, may be non‐monotonic. Under asymmetric information, public LTC transfers are lower than their full information level for the parents whose children are the least altruistic, while it is distorted upward for the highest level of altruism. This is explained by the need to provide incentives to highly altruistic children. In contrast to both topping up and opting out policies, the implementing contract is always such that social care increases with informal care.     

Optimal contracting with altruism and reciprocity

Motivated by the recent experimental evidence on altruistic behavior, we study a simple principal–agent model where each player cares about other players' utility, and may reciprocate their attitude towards him. We show that, relative to the selfish benchmark, efficiency improves when players are altruistic. Nevertheless, in contrast to what may be expected, an increase in the degree of the agent's altruism as well as a more reciprocal behavior by players has ambiguous effects on efficiency. We also consider the effects of the presence of spiteful players and discuss how monetary transfers between players depend on their degrees of altruism and spitefulness.     

Heterogeneous Dynasties and the Political Economy of Public Debt

We consider a small open overlapping generations economy with descending altruism. Heterogeneity is introduced by assuming that each parent procreates a fixed proportion of selfish children. Altruistic parents can recognize the type of each child. There is no Ricardian equivalence and an active public intergenerational transfer policy is attractive to altruistic dynasty members, although there may be no unanimity among them. We display reasonable conditions for indirect preferences to be single-peaked and we apply the median voter theorem. We then describe political equilibrium paths and discuss their compatibility with the steady path of an underlying closed economy with autonomous labor productivity growth.
JEL classification : D 31; D 64; D 72; D 91; H 63     

HOW ARE UPSTREAM TRANSFERS DETERMINED? NEW EVIDENCE FROM SOUTH KOREA

Exploiting new data from South Korea on intergenerational transfers made in regular and irregular intervals, I examine what determines and motivates upstream transfers. The results indicate that regular transfers are largely motivated by altruism, but that irregular and in‐kind transfers are unresponsive to parental economic need. The findings imply that public old‐age support would crowd out regular transfers to some extent. It is also found that roles are divided among siblings in supporting the elderly parents: the eldest married son is likely to transfer regularly and the most, whereas the other siblings transfer irregularly or in‐kind.     

How do altruistic parental transfers affect the welfare gains of marriage?

This paper analyses the effects of altruistic parental transfers on the welfare gains of marriage. To that end, it develops a sequential game which, in a first stage, determines the optimum level of the transfer between the altruistic donor (the parent) and the recipient (the daughter/son). In the second stage, the levels of consumption and provision of a family good are deduced by way of a Nash bargaining solution, with the threat point being represented by divorce. We find that the degree of altruism of the recipient has a null effect on the gains in welfare derived from the marriage by the recipient’s spouse, and a positive effect on those derived by the recipient. Additionally, the degree of altruism of the donor has a positive effect on the gains in welfare derived from the marriage by the recipient’s spouse, and an ambiguous effect on those derived by the recipient.     

Overlapping Generations or Infinitely-Lived Agents: Intergenerational Altruism and the Economics of Global Warming

Do we need an overlapping generations model for the economics of global warming? To answer this question, an infinitely-lived agent (ILA) approach and an overlapping generations (OLG) model are contrasted. ILA and OLG can be viewed as polar representations of intergenerational altruism. With ILA an immortal agent acts through his investment/savings decisions as trustee on the behalf of the future generations. With OLG, agents need not behave altruistic. They simply save during working years and dissave completely during retirement. Nevertheless, ILA and OLG must not differ in their implication for greenhouse policy. Greenhouse gas abatement is a straightforward alternative to physical capital formation and, even without altruism, each age cohort has an incentive to provide current abatement in order to reduce future damages attributable to climate change. Indeed, under reasonable assumptions and parameter values, our simulations reveal such an invariance result. Provided carbon taxes are the only policy tool and tax revenues are recycled through socially mandated rules, projections of economic growth, climate change and energy consumption are only insignificantly affected by the choice of approach.     

Intergenerational transfers and the social discount rate

This paper investigates the relationship between intergenerational asset transfers and the choice of the discount rate for use in cost-benefit analysis in a model of a competitive overlapping generations economy constrained by a socially managed exhaustible resource. Provided that there are no distortions in capital markets and that all agents hold perfect foresight, cost-benefit techniques will result in a Pareto efficient resource allocation if the discount rate is set equal to the market rate of interest. But since the path of the interest rate depends on the level of intergenerational transfers, cost-benefit techniques do not ensure a socially desirable distribution of welfare between generations; a social optimum will result only if intergenerational transfers are properly chosen and enforced. Decentralized private altruism may result in intergenerational transfers that both present and future individuals would agree are too small if members of the present generation attach positive weight to the general welfare of future generations, not simply their personal descendants. In a world where intergenerational transfers are non-optimal, second-best policy-making may imply a constrained optimum that is inefficient. Together, these findings suggest that cost-benefit analysis is at best a partial criterion to policy formulation that should be used only in conjunction with ethical principles that define the proper distribution of welfare between present and future generations.     

Public pensions and growth

This paper investigates the relationship between the size of an unfunded public pension system and economic growth in an overlapping generation economy, in which altruistic parents finance the education of their children and leave bequests. Unlike the existing literature, we model intergenerational altruism by assuming that children's income during adulthood is an argument of parental utility. Unfunded public pensions can promote growth when families face liquidity constraints preventing them from investing optimally in the education of their children. We consider two alternative ways of financing a public pension system, either by levying social contributions in a lump-sum manner or in proportion to labour income. We find that there is no case for unfunded public pensions in economies where bequests are operative. By contrast, there exists a growth-maximising size of the public pension system in economies where bequests are not operative and individuals are sufficiently patient.     

私人代际转移动机研究*——基于CHARLS的实证分析

经济学家对代际的物质和时间转移的兴趣引发了人们对转移动机的研究与思考。传统的解释有两种：利他主义与交换互惠。本文利用CHARLS数据，对中国的代际转移动机进行实证研究，发现受传统文化的影响，中国的代际转移更多地表现出利他主义倾向，同时示范效应也有所体现，即个体在照顾父母的同时也在教育自己的孩子赡养父母，以期退休后得到子女的照顾。相对西方国家来说，我国养老金体系的压力较小。但随着老龄化的加剧和生育率的下降，为了缓解未来独生子女赡养双方父母的压力，应当在减少挤出私人代际转移的基础上完善社会保障体系，提高我国老年人口的生活质量。     

Public Goods Games,Altruism, and Evolution

I analyze the evolution of altruistic preferences in a population where individuals are matched pairwise to play a one‐shot public goods game. I determine the evolutionarily stable degree of altruism, allowing for assortative matching. The stable degree of altruism is strictly smaller than the degree of assortativity. In particular, if matching is completely random, spite is stable, and a positive degree of assortativity is necessary for pure selfishness to be stable. Furthermore, the stable degree of altruism is increasing in the degree of assortativity, and it depends on the specifics of the public goods game.     

Measuring altruism in a public goods experiment: a comparison of U.S. and Czech subjects

This paper compares contributions to an experimental public good across the United States and Czech Republic, using a design that allows us to distinguish between altruism and decision error. Czech subjects contribute significantly more than American subjects, and further analysis reveals that this result cannot be attributed to the confounding effects of gender or decision error. Instead, preferences for altruism appear to differ across groups: Czechs are more altruistic than Americans and men are more altruistic than women.     

Disentangling the sources of pro-socially motivated effort: A field experiment

This paper presents evidence from a field experiment, which aims to identify the two sources of workers' pro-social motivation that have been considered in the literature: warm glow altruism and pure altruism. We employ an experimental design that first measures the level of effort exerted by student workers on a data entry task in an environment that elicits purely selfish behavior and we compare it to effort exerted in an environment that also induces warm glow altruism. We then compare the latter to effort exerted in an environment where both types of altruistic preferences are elicited. We find evidence that women increase effort due to warm glow altruism while we do not find any additional impact due to pure altruism. On the other hand, men in our sample are not responsive to any of the treatments.     

Free‐Riding and the Provision of Public Goods in the Family: A Laboratory Experiment*

We examine the provision of family public goods using experimental economics methods. With sufficient altruism and shared resource arrangements, families can provide the efficient level of family public goods. Becker's Rotten Kid Theorem asserts that transfers from altruistic parents will induce children to maximize family income even if children are not altruistic toward other family members. Consistent with altruism, parents and children contributed more to a public good when in groups with family members than when in groups with strangers. In contrast to the predictions of the Rotten Kid Theorem, however, children's behavior fell short of maximizing family income.     

Remittances for economic development: The investment perspective

Based on the economic theory of the family, this paper constructs a model of remittances where the migrant, besides sending money to his family, also invests in his home country. The investment is looked after by a family member in return for some monetary compensation. The model focuses on two different cases: state-contingent transfers (transfers are tied to investment outcomes) and fixed transfers (transfers are mainly of altruistic motive). As the migrant derives utilities from consumption, his consumption-investment decision is driven by preferences and future investment prospects. The transfers are to increase with both business encouraging and income compensatory effects.     

利他偏好的内生模型及其经济学解释

利他行为对自利人性假设的挑战,要求经济学必须把偏好进行内生化处理。笔者首先构建了一个利他偏好内生模型,使得人类行为统一于效用最大化模式并具有了内在一致的规律性和可预测性;然后对利他偏好内生模型的合理性进行了解释。笔者认为,与利己行为不同,行为主体不是从利他行为后果而是从利他行为本身获得效用;通过整体间的生存适应性补偿机制,利他者不仅可以战胜利己者得以存在和持续,而且利他惩罚行为还为人类走出囚徒困境提供了有力的保证。