CONTRACEPTION AND DEVELOPMENT: A UNIFIED GROWTH THEORY

This study investigates the interaction of the use of modern contraceptives, fertility, education, and long‐run growth. It develops an economic model that takes into account that sexual intercourse is utility enhancing and that birth control by modern contraceptives is more efficient but more costly than traditional methods. The study shows how a traditional economy, in which modern contraceptives are not used, gradually converges toward a high growth regime, in which modern contraceptives are used. Lower prices or higher efficacy of contraceptives are conducive to an earlier onset of the fertility transition and a quicker takeoff to modern growth.     

CAPITAL‐ AND LABOR‐SAVING TECHNICAL CHANGE IN AN AGING ECONOMY

Does population aging and the associated increase in the old‐age dependency ratio affect economic growth? The answer is given in a novel analytical framework that allows for population aging to affect endogenous capital‐ and labor‐saving technical change. In a steady state capital‐saving technical progress vanishes, and the economy's growth rate of per‐capita variables reflects only labor‐saving technical change. The mere possibility of capital‐saving technical change is shown to imply that the economy's steady‐state growth rate becomes independent of its age structure: Neither a higher life expectancy nor a decline in fertility affects economic growth in the long run.     

The past and future of knowledge-based growth

This paper consolidates two previously disconnected literatures. It integrates R&D-based innovations into a unified growth framework with micro-founded fertility and schooling behavior. The theory suggests a refined view on the human factor in productivity growth. It helps to explain the historical emergence of R&D-based growth and the subsequent emergence of mass education and the demographic transition. The model predicts that the erstwhile positive correlation between population growth and innovative activity turns negative during economic development. This “population-productivity reversal” explains why innovative modern economies are usually characterized by low or negative population growth. Because innovations in modern economies are based on the education of the workforce, the medium-run prospects for future economic growth—when fertility is going to be below replacement level in virtually all developed countries—are better than suggested by conventional R&D-based growth theories.     

Return migration and the transfer of gender norms: Evidence from the Middle East

Does international return migration transfer gender norms? Focusing on Jordan, an Arab country where gender inequality and emigration rates are high, this paper exploits unique data in which detailed information on female empowerment allows us to construct several measures of social norms in Jordan on the role of women, female freedom of mobility, and female decision-making power. Controlling for both emigration and return migration selections, we find that women with a returnee family member are more likely to bear traditional gender norms than women in households with no migration experience. Further analysis shows that results are driven by returnees from more conservative Arab countries, suggesting a transfer of conservative norms from destinations with highly traditional gender roles. We also show the implications of our results beyond perceptions for several economic and development outcomes, such as female labour force participation, education and fertility.     

Empowering knowledge: Political leaders,education, and economic liberalization

Recent literature reports significant effects of political leaders in driving economic policies but does not provide an exhaustive answer as to why. This paper argues that educational background plays an important role in shaping leaders' ideas and beliefs, which in turn matter for policy making in the long run. Using a cross-country data covering 137 countries and regions over 1960–2005, the paper documents a robustly positive relationship between leaders educational attainment and faster liberal reforms, regardless of regime type. The effects are more salient for leaders who majored in economics, social science, and natural science. Moreover, the effects of education seem to be orthogonal to alternative channels such as partisan politics, geopolitical factors, and public opinions.     

Human capital and economic growth in an overlapping generations model

The paper describes an aggregative optimal growth model, the essential features of which are that individuals are mortal and obtain their labor skill through educational training. The process of human capital formation is described by an education function which relates the pass rate to the educational expenditure per student. Two alternative scenarios, private and public education regimes, are separately investigated. Under the decentralized education regime, risk-neutral individuals borrow to finance their education when young. Under the centralized education regime, the cost of education is financed by taxes imposed on the workers in the economy, and the central government maximizes a long-term social target function. The equilibria of both regimes are analyzed and various comparative static results derived. It is shown that educational investment in a decentralized equilibrium is higher than that in the centralized steady state. We also establish that there exists a time discount rate at which or above which the decentralized per capita consumption exceeds that of the centralized steady state whereas for time rates of discount sufficiently near the population growth rate, the above result will be reversed.     

Egalitarian norms,economic development,and ethnic polarization

Economic development generally implies that traditional egalitarian norms and beliefs are replaced by modern individualistic values. Particularly when opportunities for advancement are unequally presented to people, this transformation may be accompanied by polarization and violent conflict. We illustrate this point by describing the processes of land privatization in Sub-Saharan Africa and then present two models that capture some salient aspects of this transformation in rural communities, including the possibility of polarization. We find that the support of egalitarian norms is notably strong when new opportunities are available for only a few people or when the community is socially unstable. Moreover, in unstable communities, polarization is strongest when the group with the most lucrative opportunities comprises half the population.     

我国人口的社会结构失衡:理论机制与经验事实

随着生育率水平的持续下降,我国不仅面临人口数量增长的困境,而且也发生了严重的人口社会结构失衡.文章基于教育资源稀释理论,从理论和经验两个方面研究了教育与生育率之间的相互作用以及由此所决定的人口发展规律,从而论证了人口社会结构失衡现象及其形成机制.研究表明:(1)教育与生育率之间的相互作用机制,一方面可以使生育率水平持续上升,导致人口发展进入高生育陷阱,另一方面也能够使生育率水平不断下降,让人口发展滑入低生育陷阱,由此形成了人口发展的"Z"形变化规律,即在中等教育水平上教育与生育率之间显著负相关,而在较高和较低的教育水平上两者并无明显关联;(2)由于我国的教育发展存在明显的城乡差距、地区差距和民族差距,那么在"Z"形人口发展规律的影响下,所有居民必然会逐步分化为两类,分别向生育率的高低两端集聚,从而就产生了人口的城乡结构、地区结构、民族结构和素质结构的失衡.进一步地,文章基于全国人口普查县级数据,使用工具变量法和Hausman-Taylor估计方法,验证了这种"Z"形人口发展规律及其所决定的人口社会结构失衡.文章不仅可以丰富当前的人口结构研究,而且对我国的人口和教育改革具有重要的启示.     

Growth,fertility and human capital: A survey

This paper surveys recent work on endogenous fertility and endogenous growth. These models provide the building blocks for a theory of development. They are capable of explaining income and fertility differentials between rich and poor countries. They can produce switching behavior, countries that transform themselves from no growth economies into high growth economies. The fertility and growth effects of social security programs are also examined. Finally models with increasing returns to population are presented. They are capable of reproducing very long term relationships between human capital, fertility and economic growth.     

Primary education and fertility rates

Unified growth theory advances that the transition from a Malthusian regime to sustained economic growth is characterized by technological progress and, amongst other things, by an increase in demand for human capital which in turn creates incentives for lower fertility rates. Bearing that in mind, I ask the question: has southern Africa escaped the Malthusian stagnation? Specifically, I study whether primary school completion rates have played any role in total fertility rates in all countries of the Southern African Development Community (SADC) during the 1980–2009 period. Contrary to conventional wisdom, the results, based on dynamic panel time‐series methods, suggest that primary education is associated with lower fertility in the SADC, or that the community is already trading‐off quantity for quality of children. Although I do not claim causality, overall the results are significant because, in accordance with unified growth theory, they suggest that the SADC is experiencing its own transition from the Malthusian stagnation epoch into sustained growth, or that the SADC is going through its own post‐Malthusian regime.     

Warm glow and the transmission of pro‐socialness across generations

The transmission of pro‐socialness across generations is modeled using the warm‐glow approach. The parent generation seeks to cultivate pro‐social values in their children as this would improve their material well‐being when they grow up as cooperative adults. I show that communities endowed with more productive resources have a stronger incentive to teach their children social cooperation. Thus, there is a correlation between a village's level of material well‐being and villagers’ steady‐state level of pro‐socialness. When the cost of moral education is directly dependent on the parent generation's level of pro‐socialness, the multiplicity of steady states may emerge. If a community's initial level of pro‐socialness is high, the system will reach an interior steady state; in contrast, if this initial level is low, eventually the level of pro‐socialness will approach zero in the long run. Thus communities that start with similar initial levels of pro‐socialness may end up at drastically different steady states.     

Capital accumulation,income distribution and endogenous fertility in an overlapping generations general equilibrium model

A study is conducted in attempts to increase the understanding of the links between macroeconomic effects and causes of population growth in formulating policy. An overlapping generations general equilibrium model is employed aggregating household decisions about fertility, savings, and investment in the human capital of children with the objective of studying intertemporal relationships among population growth, income distribution, inter-generation social mobility, skill composition of the labor force, and household income. As a result of endogenous fertility, the equilibrium path attains steady state from the second generation. Income tax transfer, child taxation, and social security taxation policies are also examined in the paper. A structural explanation is given for the inverse household income-child quantity and negative child quality-quantity relationships seen in developing countries. In a Cobb-Douglas economy, these relationships hold in the short-run, potentially working over the long-run in other economies. Overall, the model shows that group interests may hinder emergence of perfect capital markets with private initiatives. Where developing countries are concerned, these results have strong implications for population policy. A policy mix of building good quality schools, or subsidizing rural education, introducing a formal social security program, and providing high-yield, risk-free investments, banking, and insurance services to the poor is recommended.     

Gender Inequality,Endogenous Cultural Norms,and Economic Development

In this paper, I explore the joint dynamics between gender inequality and cultural norms along the process of development. Cultural norms regarding gender roles are shaped by the relative female labor supply, and thus depend on the gender gap in education. In turn, these norms influence the relative education provided to boys and girls. I show that this two‐way causality between the inegalitarian nature of norms and the educational gender gap might explain the emergence of high gender inequality and low development traps. The model also makes it possible to replicate a U‐shaped relationship between the relative status of women and the economic development.     

Endogenous Growth and Intellectual Property Rights: A North–South Modelling Proposal with Population Ageing

This paper studies the effect of intellectual property rights (IPR) on economic growth, in the light of population ageing, i.e., in a more realistic context. The analysis is motivated by the implications of population ageing on economic growth. Moreover, this study analyses this relationship in a north–south framework where there is a healthcare sector. We conclude that population ageing has no impact on the sign of the IPR effect on economic growth. However, it positively affects the steady‐state growth rate. Finally, under some conditions, the presence of the healthcare sector also increases the steady‐state growth rate.     

Fertility,Intra‐Generational Redistribution,and Social Security Sustainability

Incorporating heterogeneity in preference to having children into an overlapping generations model of a small open economy, we examine the effects of changes in the size of pay‐as‐you‐go (PAYG) social security on fertility choices of individuals and population growth of the economy. It is shown that PAYG social security will raise population growth by increasing the number of individuals who have children and the number of children parents have if the system involves redistribution between retirees with different contributions, whereas, if it has no redistribution, PAYG social security does not affect the fertility decisions of individuals.     

Diffusion of technical change in medicine— a case study of oncology in a traditional society

This article reviews a new program established to provide modern modes of oncologic therapy to Arab cancer patients in the West Bank. The population of this region is distinguished by its fatalistic and traditional attitudes, and communication via word of mouth is prevalent. Therefore, the social system can be considered as one of traditional norms discouraging the adoption of new ideas. Demonstration effects and face-to-face communication proved effective in bringing about social change in health patterns.     

Effect of social security on fertility and savings: an overlapping generations model

Old-age pension schemes do not exist in most developing countries, so adults bear children as security investments for the future. This phenomenon leads to unduly high rates of population growth. It has been hypothesized that introducing social security programs in such countries would increase savings rates and reduce the number of children born over the long term. The author studies the general equilibrium effects of some social security programs on rates of population growth and capital accumulation within an overlapping generations framework with endogenous fertility and savings. Specifically, Raul's overlapping generations growth model is extended to study the general equilibrium effects of payroll-tax-financed and child-tax-financed social security programs. It is shown that if the rate of intergenerational income transfers from young to old or child care cost is low, competitive equilibrium leads toward overpopulation and capital accumulation in a modified Pareto optimal sense; a social security program in such a case is therefore Pareto improving. A fully-funded system is not neutral when financed by child taxes. Finally, it is also shown that unlike in the case of exogenous fertility where competitive equilibrium attains steady state only asymptotically, fertility, when endogenous, may attain a unique globally steady state in finite time.     

CHINA'S ECONOMIC GROWTH: WHAT DO WE LEARN FROM MULTIPLE‐BREAK UNIT ROOT TESTS?

This paper investigates China's economic growth by performing multiple‐break unit root tests on the data of national and sectoral output and output per worker to identify their steady‐state and transitional growth paths. The evidence generated suggests that the growth behaviour of the Chinese economy is consistent with endogenous growth theory. The results of multiple‐break unit root tests are then explained within the endogenous growth framework, using historical observations on how the evolution of economic institution/environment causes changes in some institutional parameters and hence in the steady‐state growth rate of GDP per worker.     

Demographic change,human capital accumulation and R&D‐based growth

Employing an overlapping generations model of R&D‐based growth with endogenous fertility and education decisions, we examine how demographic changes induced by an increase in life expectancy influence the long‐run growth rate of the economy. We demonstrate that life expectancy, when relatively low (high), positively (negatively) affects economic growth. This paper also compares the growth implications of child education subsidy policies (i.e., policies for enhancing basic education) and child rearing subsidy policies (i.e., pro‐natal policies) and demonstrate that while the child education subsidies consistently foster economic growth, child rearing subsidies may negatively affect economic growth.     

Bounded rationality,expectations, and child labour

This paper develops a model with overlapping generations, where the household's optimal fertility, child labour, and education decisions depend on the parents’ expectations or beliefs about the return to education. It is shown that there exists a range of parental income where the fertility rate is high and children participate in the labour market and receive an incomplete education if a parent believes the return to education is low. The act of participating in the labour market reduces the child's ability to accumulate human capital; thus, the action of sending a child into the labour market is sufficient to ensure that the parents’ initially pessimistic expectations are fulfilled. It is then shown that a one‐time policy intervention, such as banning child labour and mandatory education, can be enough to move a country from the positive child labour equilibrium to an equilibrium with no child labour.