Capital accumulation,endogenous population growth,and Easterlin cycles

In this paper we attempt to explain the occurrence of population cycles in industrialised economies where the birth rate depends on the difference between the actual and the expected consumption rate. This model of an endogenously growing population brings together Easterlin's idea of an adapting aspiration level with the neoclassical optimal growth paradigm. It is shown that in this highly aggregated demo-economic system (i.e., without inclusion of the age structure of a population) swings both in the economic and demographic variables may exist. The reason behind this strange optimal behaviour is identified to be an intertemporal substitution effect between current and future levels of consumption.We wish to thank A. Novak for helpful assistance and an anonymous referee for useful comments. Financial support by the Austrian Science Foundation under contract No. P6601 is acknowledged.     

Capital accumulation and the sources of demographic change

We develop a neoclassical growth model having a realistic demographic structure. We identify the critical channel of impact to be the intertemporal consumption allocation decision through the “generational turnover term”. Expressing the aggregate dynamics as a generalization of the conventional neoclassical growth model provides important insights, enabling us to view in a unified way how alternative demographic structures impinge on the macrodynamic equilibrium. Using an approximation to the generational turnover term, we are able to characterize both the steady state and the local transitional dynamics. Through numerical simulations, we analyze the steady state as well as the transitional effects of structural and demographic changes.     

Capital accumulation,aspiration adjustment,and population growth: limit cycles in an Easterlin-type model

"One of the recent interesting hypotheses of population growth is due to Easterlin who suggests the possibility of self-generating fluctuations in birth numbers. The present paper tries to answer the question whether feedback mechanisms produce persistent oscillations in population growth. A system of two nonlinear differential equations for the per capita capital stock and the aspiration level is studied by a phase portrait analysis. Using the Poincare-Bendixson theorem we derive sufficient conditions for the existence of a stable limit cycle." (SUMMARY IN FRE)     

Nuptiality,fertility and reproduction in Norway

The vital and census statistics of Norway for the last 25 years are analysed in order to compute the average family size of different marriage cohorts, and to assess the extent to which the Norwegian population is replacing itself. Methods are devised to overcome the gaps in some of the statistics caused by the war. The conclusion is reached that replacement level has been reached in the post-war years, though the conventional net reproduction rate overestimated the replacement index by 16%.     

人力资本、社会资本与高校毕业生就业质量

利用多个高校的第一手调查资料,从工资水平、就业单位类型和主观满意度等三个方面测量毕业生的就业质量,并把大学生的人力资本分解为学术性人力资本和实践性人力资本,他们的社会资本分解为家庭经济性资本和家庭社会性资本,具体考察人力资本和社会资本是否以及如何影响大学毕业生的就业质量.研究发现,大学生的人力资本和社会资本对他们工资水平和就业单位类型产生正向作用,但对就业的满意度则呈负面影响;另外,与社会资本相比,人力资本对大学生就业质量的影响更显著,结合大学生就业质量现状,本文也讨论了研究结论的政策含义.     

The three R's: Residence,religion, and reproduction

Survey research data collected in Rhode Island over a three year interval are used to test six propositions: 1) Suburbanites have higher family size than central city residents. 2) Any differences in family size between Catholics and non-Catholics are larger in central city than in suburban areas. 3) Within religious categories, suburbanites attend church more regularly. 4) Among Catholics, suburban residence is associated with less frequent Communion reception. 5) Among Catholics, church attendance frequency is positively associated with family size. Among non-Catholics no relationship exists. 6) The frequency with which Catholics receive Communion is more strongly associated positively with family size than is church attendance frequency. Propositions 1, 2 and 5 are rejected. Propositions 4 and 6 are accepted. Proposition 3 is accepted for non-Catholics only.     

Durable consumption,saving and retirement

Durables yield services through life but are also a store of value and both features may have important implications for savings and retirement decisions. Durables also affect bequests and thus induce intergenerational transfers. We show that allowing explicitly for durables has important implications for retirement decisions and responses to various changes in the environment. An improvement in the possibility of freeing housing capital makes the old retire earlier (income effect) while the young plan to retire later since they increase housing demand and reduce financial savings. Considering welfare in stationary equilibrium, we find that a reduction in wealth locking-in in durables is not necessarily welfare improving due to the effects on bequests. From a social welfare perspective, individuals tend to choose too much financial savings, too little durable acquisition and too early retirement.     

Reference groups and family size norms

The concept of reference groups is introduced as a theoretically useful mechanism involved in diffusing collective norms and values about family size and in formation of family size ideals of individual family members. Data were gathered via self-administered questionnaires from a random sample of 140 urban and 55 rural families in the Lansing, Michigan metropolitan area. Findings show major variations by sex. Conformity to a two-child family norm in the family size ideals of wives depends on the extent to which they are exposed to this norm through reference group interaction and on the size of their families of origin. Husbands' family size ideals are influenced by size of family of origin but not by reference group interaction. In further exploring this pattern of findings, important differences emerge by controlling for educational attainment and residential location.Revised version of a paper presented at the Annual Meeting of the American Sociological Association, Session "Population: Fertility Behavior," Chicago, September 5–9, 1977. This research was supported by the Michigan Agricultural Experiment Station, Project 3152, "Functioning of the Family Ecosystem in a World of Changing Energy Availability" through the Institute for Family and Child Study and the Department of Sociology. Acknowledgements are due to Shirley Foster Hartley, Nan E. Johnson, Harry Perlstadt, Harry K. Schwarzweller, and the referees of this journal, all of whom made helpful comments on an earlier draft of this paper. Michigan State Agricultural Experiment Station Journal Article Number 8245. Requests for reprints should be sent to Daniel C. Clay, Department of Sociology, Michigan State University, East Lansing, Michigan 48824.     

人力资本、生育率与经济增长

本文通过对人口学与经济学共同关注的几个领域最新研究的回顾,阐明了经济学与人口学两个学科在研究对象和研究方法上的联系.同时,将这些研究成果与中国的发展现状结合起来进行分析,对更深刻地认识社会经济发展过程和相应的政策取向也大有裨益.     

Child mortality, fertility, and human capital accumulation

This article analyzes the impact of decline in child mortality on fertility and economic growth. The study shows that the timing of mortality relative to education is crucial to implications of mortality decline. If child mortality is realized before education starts, an exogenous decline in child mortality leads to a decline in education—a finding that is opposite to those of studies that considered a decline in mortality after the cost of education has been incurred. The work also demonstrates the role of parental human capital in reducing child mortality and the causal link between rising education and declining child mortality.

Local and foreign models of reproduction in Nyanza Province, Kenya

This article uses colonial archival records, surveys conducted in the 1960s, and surveys and focus group discussions in the 1990s to describe three distinct but temporally overlapping cultural models of reproduction in a rural community in Kenya between the 1930s and the present. The first model, “large families are rich,” was slowly undermined by developments brought about by the integration of Kenya into the British empire. This provoked the collective formulation of a second local model, “small families are progressive,” which retained the same goal of wealth but viewed a smaller family as a better strategy for achieving it. The third model, introduced by the global networks of the international population movement in the 1960s, augmented the second model with the deliberate control of fertility using clinic provided methods of family planning. By the 1990s this global model had begun to be domesticated as local clinics routinely promoted family planning and as men and women in Nyanza began to use family planning and to tell others of their motivations and experiences.     

Fertility and income,consumption aspirations,and child quality standards

Data from a 1975 national survey of the American population were used to investigate the relationships between childbearing and aspirations for consumption goods, child quality standards, and income. The data were consistent with the hypothesis that preferences for child quality are negatively related to fertility. Aspirations for consumer goods which are related to the home were not found to be negatively related to childbearing while aspirations for nonhome goods were negatively related to fertility as hypothesized. Several indicators of income and subjective economic well-being were examined, and the overall pattern of results was not supportive of the hypothesized effect of income on fertility.     

Free education, fertility and human capital accumulation

This article analyzes the effect of free public education on fertility, private educational investments, and human capital accumulation at different stages of economic development. The model shows that, when fertility is endogenous, parental human capital levels are crucial for determining the effect of free education. At early stages of development when parental human capital is low, free access to basic education may provide the only chance to leave poverty. In contrast, at advanced stages of development when parental human capital is high, the availability of free education crowds out private educational investments, stimulates fertility, and may impede growth.     

人力资本、人口变动与经济增长

本文在Lucas模型基础上,构建了一个人力资本、人口变动和经济增长模型,并分别利用1997～2004年全国30个省区市以及东部12个省、中部9个省、西部9个省的面板数据,使用固定效应模型对理论模型的预期结果进行了实证检验,发现人力资本、贸易开放度对经济增长具有显著正效应,而人口增长率、FD I与经济增长的关系则具有不确定性。这些结果可在一定程度上解释我国区域经济发展中存在的差距。特别值得指出的是,回归结果并不支持在东部发达地区率先尝试放松生育控制政策的观点。     

劳动力就业市场化、人力资本与人职匹配

提升人职匹配是提高劳动力市场效率的重要途径,为了研究在我国市场化进程中影响人职匹配的因素其作用是如何变化的,文章通过建构多层次随机系数模型,考察了不同市场化程度下人职匹配的信息传递机制及其变化。研究结果表明：在不完善的市场中,学历及人际网络搜寻方式都可以发送或传递人力资本质量信号,从而提高人职匹配程度;但随着就业市场化程度的增加,作为正式的信号机制,学历的作用保持恒定,而作为补充性的信号传递机制,搜寻方式的作用显著下降。     

资本形式、国家政策与省际人口迁移

文章运用条件罗吉特模型(CLGT),从省际迁移人口迁入省份选择性的角度,分析了省级社会经济因素和个体因素对不同性质的省际人口迁移行为的影响作用;讨论国家与政府在控制和引导人口迁移流向与流量时的政策问题。作者认为,国家宏观投资对中国的人口迁移与流动的宏观调控是部分失效的;三种资本由于各自目的不同,对人口迁移与流动的引导作用也不尽相同;省际迁移者对迁入省份的选择是个体在自身特征的基础上,对宏观经济状况的调整与适应。     

On the dynamics of the age structure,dependency, and consumption

We examine the effects of population aging due to declining fertility and rising elderly life expectancy on consumption possibilities in the presence of intergenerational transfers. Our analysis is based on a highly tractable continuous-time overlapping generations model in which the population is divided into three groups (youth dependents, workers, and elderly dependents) and lifecourse transitions take place in a probabilistic fashion. We show that the consumption-maximizing response to greater longevity in highly developed countries is an increase in fertility. However, with larger transfer payments, the actual fertility response will likely be the opposite, leading to further population aging.     

HIV/AIDS,Social Capital,and Online Social Networks

The prospects for online social networks as sites of information-gathering and affiliation for persons with AIDS and others concerned about HIV/AIDS not only represent the latest development in a trend toward circumventing traditional media and official information sources, but also may offer hope for a revitalization of HIV/AIDS discourse in the public sphere. This article provides an overview of three decades of information-seeking on the pandemic and its social and personal implications, as well as case studies of three examples of social networking surrounding HIV/AIDS. It finds preliminary evidence of the formation of strong and weak ties as described in Social Network Theory and suggests that the online accumulation of social capital by opinion leaders could facilitate dissemination of messages on HIV/AIDS awareness and testing.     

Family Demography,Social Theory,and Investment in Social Capital

The analytic models used by family demographers would be strengthened by the concept of social capital, placed in the context of social exchange theory. Using that concept to designate resources that emerge from social ties, the authors advance five propositions: 1) social capital is a multidimensional attribute of an individual; 2) the dimensions of social capital are the number of relationships a person has, their quality (strength), and the resources available through those relationships; 3) group membership and interaction facilitate the development of social capital; 4) the structural properties of groups influence the development of social capital; and 5) the acquisition and maintenance of social capital is a major motivator of human behavior. The formation of sexual partnerships, the birth and rearing of children, and both intragenerational and intergenerational transfers constitute major forms of investment in social capital in virtually all societies.