Towards a better understanding of past fertility regimes: the ideas and practice of controlling family size in Chinese history

2006 ◽  
Vol 21 (1) ◽  
pp. 9-35 ◽  
Author(s):  
ZHONGWEI ZHAO

Thanks to the progress that has been made in the study of population history, it has been gradually accepted that fertility in historical China was only moderate in comparison with the recorded high fertility. However, scholars still disagree on whether the Chinese could have intentionally controlled their family size. This article first summarizes recent findings about fertility patterns in historical China. Then the author provides further evidence of people limiting their family size in the past, before discussing the impact of traditional beliefs on people's fertility behaviour and summarizing the antinatalist ideas and suggestions put forwarded by Chinese officials and intellectuals over China's long history. This evidence is then used to comment on a number of suggestions that have been made about China's traditional reproductive behaviour and culture. The article challenges the views that people's reproductive strategies aimed in the past to maximize the number of surviving offspring and that the demand for children (or sons) was always high in historical China.

Author(s):  
Zhongwei Zhao

China constituted one of the earliest civilizations in the world. During most of the past two millennia, China was also one of the most advanced economies and the home of around a quarter of the world’s population. By the start of the first millennium, the Chinese population was already about sixty million. In the next two thousand years, China’s population growth and economic development significantly influenced the world’s population changes and history. Partly for these reasons, in the study of population and social history, China’s historical population growth, demographic regimes, marriage patterns, and household formation systems are frequently used as examples in the discussion of population changes, microsocial structure, and their relationships with natural resources and economic development in past times. Population changes were one of the key components of Chinese history. The size and density of the population, the rise and fall of fertility and mortality, and the increase and decrease of population movements were not only related to demographic factors such as age structure. They were also strongly affected by political and economic conditions, social institutions and cultural traditions, and natural and social environments. Therefore, studies of demographic history, those conducted recently in particular, often shed new light on economic, political, social, and environmental changes in the past. This bibliography, through reviewing major works published in Chinese and English, provides an introduction to China’s main historical population data sources, major research questions, and debates in the study of Chinese population history. It also introduces recent advances in Chinese historical demography and important research findings made by these developments.


Author(s):  
H.E.M. Cool

Glass came of age during the Roman period. Within the ancient world it had been used from the mid-second millennium bce onwards, but only for jewellery and luxury items like small perfume bottles. This started to change in the late 2nd century bce, when the Hellenistic industries started to produce simple glass drinking vessels. In the early Imperial period there was an explosion in the vessel forms available, in part made possible by the discovery of how to blow glass. The new types included both the luxurious, such as exquisite cameo vessels, and the utilitarian, such as disposable packaging for cosmetics. A similar expansion was seen in its role in buildings, where glass went from luxurious interior decoration to structurally important window glass. References in literary works and depictions in wall paintings at the time attest to the considerable attention this new phenomenon attracted in the early to mid-1st century ce. Vessels, windows and other items spread widely throughout the empire and beyond, and to all levels of society. Over the next 400 years, how the material was used changed with time and place as the various regional industries responded to the needs and preferences of their communities. This was a major high-temperature industry which would have made considerable demands on resources such as fuel, but there are still many things that are unknown about it. Where, for example, was the glass itself made? Waste from secondary workshops producing vessels is regularly encountered, but evidence for the primary production is extremely rare. This has led to considerable debate, with competing models being proposed. Glass is not a material where scientific techniques such as those used to provenance pottery have proved very helpful. The composition of Roman glass is extremely uniform throughout the empire, and again there has been much debate about why this might be. Of late, some useful advances have started to be made in approaching these questions, and this may eventually disentangle what was going on. The study of Roman glass provides a unique window into the past. Through it the impact of new technologies and materials can be seen, as well as the choices people made about what was useful in their lives—all against the background of some of the most beautiful and skilful vessels ever made.


2018 ◽  
Vol 13 (S349) ◽  
pp. 474-478
Author(s):  
Rosa M. Ros ◽  
Beatriz Garca

AbstractJust as in the past, the development of the natural sciences and in particular of astronomy has changed the history of humanity. If we think about the role of our discipline into the future, it shows its enormous power in the field of education, owing to the possibility of awakening interest in science in very varied audiences. Within the framework of the enormous progress made in the technologies related to astronomy, many of them of daily use, the role of the astronomer in the era of Communications acquires fundamental importance.In this presentation, we will try to make a journey through the different ways of presenting astronomical topics for different audiences over the last 100 years. In turn, we will show some specific achievements, associated with education programmes of the discipline. We discuss the impact produced by proposals that are both rigorous in terms of content, and also appeal to the development of the human being in an integral manner, within the framework of citizen science activities.For this research, we have taken into account the uninterrupted development of the NASE programme, which has performed 112 courses in 24 countries throughout the world and in different languages. NASE has involved 4966 secondary teachers in the last eight years.


2018 ◽  
Vol 175 ◽  
pp. 01022 ◽  
Author(s):  
Zohreh Davoudi

Explorations of the properties of light nuclear systems beyond their lowestlying spectra have begun with Lattice Quantum Chromodynamics. While progress has been made in the past year in pursuing calculations with physical quark masses, studies of the simplest nuclear matrix elements and nuclear reactions at heavier quark masses have been conducted, and several interesting results have been obtained. A community effort has been devoted to investigate the impact of such Quantum Chromodynamics input on the nuclear many-body calculations. Systems involving hyperons and their interactions have been the focus of intense investigations in the field, with new results and deeper insights emerging. While the validity of some of the previous multi-nucleon studies has been questioned during the past year, controversy remains as whether such concerns are relevant to a given result. In an effort to summarize the newest developments in the field, this talk will touch on most of these topics.


2017 ◽  
Vol 5 (4) ◽  
pp. 125-135
Author(s):  
David Evans Bailey

Whilst online dating has been around for several years; immersive technologies are relatively new to this type of interaction. The first forays into immersive VR online dating have only just being made in the past year. To what degree this type of technology will change the way that we date is potentially quite different from the current way that online dates are conducted. The way the technology works could make virtual dates seem as real as a physical date. Understanding how immersive technology functions gives some insights into the future of online dating and also the impact on the digital economy.


2019 ◽  
Vol 7 ◽  
pp. 163
Author(s):  
M. Kokkoris ◽  
H. Huber ◽  
S. Kossionides ◽  
T. Paradellis ◽  
Ch. Zarkadas ◽  
...  

Several experiments have been carried out in the past in order to examine the impact of medium and heavy ions in crystals in the MeV range, which is of particular interest in high energy implantations. In the present work, the gradual amorphisation of simple crystals such as Si (100), Ge (100) and W (100) when irradiated with 18 MeV 1 6 0 in a random direction is being studied using the progressive change of channeling parameters, up to a maximum dose of approximately 1Ί01 6 par tides/en*2. The results are compared to the ones present in literature and an attempt is made in order to explain the peculiarities of the experimental spectra.


2014 ◽  
Author(s):  
◽  
Nguyen Doan

[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] This dissertation is a combination of three essays on development economics. In essay 1, I examine the impact of microcredit use on several aspects of households in Vietnam. One of the main findings is that access to microcredit makes people feel more optimistic. To deal with the possible endogeneity of microcredit availability, I use fixed effect models and also consider an instrumental variables approach. This framework provides controls for both unobserved and observed attributes of households. I do not find clear evidence that microcredit use has significant impact on household profits and expenditures on healthcare, education, food, or assets. The difference between how households respond to permanent income and oneshot income can be used to explain Vietnamese households' consumption behaviors. Because microcredit loans are uncertain incomes, households may hesitate to spend them right away. This could be a reason why we do not see clear evidence of microcredit effects on household consumption behaviors. Essays 2 and 3 focus on economics of fertility. In particular, in essay 2, I evaluate the children quantity/quality trade-off model. Finding exogenous variations in the quantity of children is the key in empirical studies on the quantity-quality trade-off. Prior to 2003, the Vietnamese government restricted the number of children per family to two and the policy was binding on government workers. Using the Vietnam Household Living Standard Survey data, I find that after the relaxation of the two-child policy in 2003, government workers are more likely to have more than two children compared to the general population. In particular, the policy increases the percentage of families that have more than two children by 8 percent. I use this exogenous increase in the quantity of children to build an instrument for fertility to test the Becker model. My findings are an increase in the number of children reduces the school enrollment of first-born children, but increases the education spending on a first-born child who is enrolled. In essay 3, I examine the causal link from family size to labor force participation of members in families, including mothers, fathers, and the first-born children. The research design exploits variation in fertility due to preferences for male children. Adopting the instrument for fertility introduced by Angrist et al. (1998, 2010), we find that the preference for a mixed sibling-sex composition Angrist et al. described in their papers does not exist in Vietnam. Having two first girls is more likely to push couples to try for more in hope of having a boy, but having two first boys can be enough for them. Empirical results show members in families respond differently to an increase in family size, and the results are also very different for urban and rural households. Children in rural areas suffer the most from high fertility. An additional child makes more rural parents get involved in self-employment to find a way to support their families. Negative effects of fertility on parental working hours are found in samples of urban mothers and rural fathers.


Blood ◽  
2021 ◽  
Author(s):  
Frank W.G. Leebeek ◽  
Wolfgang Miesbach

In the past decade enormous progress has been made in the development of gene therapy for hemophilia A and B. After the first encouraging results of intravenously administered AAV-based liver-directed gene therapy in patients with severe hemophilia B were reported in 2011, many gene therapy studies have been initiated. Most of these studies, using AAV vectors with various gene constructs, showed sufficient FVIII and FIX expression in patients to significantly reduce the number of bleeds and the need for prophylaxis in the fast majority of the severe hemophilia patients. This resulted in great clinical benefit for nearly all patients. In this review we will summarize the most recent findings of reported and ongoing gene therapy trials. We will highlight the successful outcome of trials with focus on the results of recently reported phase 1 trials and preliminary results of phase 2b/3 trials for hemophilia A and B. These new reports also reveal the impact of side effects and drawbacks associated with gene therapy. We will therefore also discuss the limitations and remaining issues of the current gene therapy approaches. These issues have to be resolved before gene therapy will be widely available for the hemophilia patient population.


2011 ◽  
Vol 14 (01) ◽  
pp. 60-75 ◽  
Author(s):  
C.R.. R. Clarkson ◽  
R.M.. M. Bustin

Summary Coalbed methane (CBM) produced from subsurface coal deposits has been produced commercially for more than 30 years in North America, and relatively recently in Australia, China, and India. Historical challenges to predicting CBM-well performance and long-term production have included accurate estimation of gas in place (including quantification of in-situ sorbed gas storage); estimation of initial fluid saturations (in saturated reservoirs) and mobile water in place; estimation of the degree of undersaturation (undersaturated coals produce mainly water above desorption pressure); estimation of initial absolute permeability (system); selection of appropriate relative permeability curves; estimation of absolute-permeability changes as a function of depletion; prediction of produced-gas composition changes as a function of depletion; accounting for multilayer behavior; and accurate prediction of cavity or hydraulic-fracture properties. These challenges have primarily been a result of the unique reservoir properties of CBM. Much progress has been made in the past decade to evaluate fundamental properties of coal reservoirs, but obtaining accurate estimates of some basic reservoir and geomechanical properties remains challenging. The purpose of the current work is to review the state of the art in field-based techniques for CBM reservoir-property and stimulation-efficiency evaluation. Advances in production and pressure-transient analysis, gas-content determination, and material-balance methods made in the past 2 decades will be summarized. The impact of these new methods on the evaluation of key reservoir properties, such as absolute/relative permeability and gas content/gas in place, as well as completion/stimulation properties will be discussed. Recommendations on key surveillance data to assist with field-based evaluation of CBM, along with insight into practical usage of these data, will be provided.


2000 ◽  
Vol 32 (1) ◽  
pp. 125-140 ◽  
Author(s):  
NEIL H. THOMAS ◽  
MU AIPING

A survey of women in two highly developed rural counties of China, Sichuan and Jiangsu Provinces, was carried out in late 1991, to gain information about demographic and economic change between 1980 and 1990. Three separate surveys were conducted: the first a questionnaire administered to married women aged 30–39, eliciting information about childbearing and contraception, as well as the social and economic background of the respondents; the second, focus group interviews emphasizing the motivation for childbearing. Official information about the selected villages, townships and counties was also collected.National level data in 1987 show that individual reproductive behaviour in China failed to conform to a universal, effectively implemented, population policy. They imply either a spatial range of policies, or great diversity in the demand for children, or perhaps a combination of both.Such diversity in reproductive behaviour is also found in the study area. The purpose of the analysis was to examine the diversity in reproductive behaviour and contraceptive practice, and to discover whether differentials are influenced by area, or else exist between individuals within areas. If the former, then the explanation may be found in differences in policy formulation and implementation between areas: and if the latter, to demand for children, or else differential application of policy restrictions.The main findings were that: (1) the explanation of the pattern of fertility and contraceptive use is to be found at the individual level (within locations) rather than in policy differences between administrative units; (2) the association between income and number of children is negative, as is that between income and the propensity for uniparous women to remain unsterilized. The theory that privilege may be exercised to gain concessions from birth planning cadres is therefore not supported; (3) ideal family size differentials are largely absent, showing that social (education) and economic (income, occupation) characteristics are not responsible for differences in reproductive motivations, and implying that the nature of the demand for children is very different from that in most rural areas of the Third World; (4) data on ideal family size by sex of the existing offspring indicate only a weak preference for sons.The low demand for children, and the weak son preference, may both be explained by the social acceptability of uxorilocal marriages, and of village endogamy, together with the prohibitive costs of children, and especially of sons. This partly results from the expense of education, but most mothers emphasize marriage costs.It is speculated that the circumstances responsible for the escalating costs of children in the two counties are likely to pertain in growing areas of the country, with the privatization of education and health services, the declining support of collective institutions, and the replacement of this function by kinship networks.These on-going changes imply that any policy of reproductive restriction for the purposes of population control is likely soon to meet with diminishing resistance; and it may later be rendered unnecessary in the eyes of government officials, as fulfilled reproductive intentions lead to a fertility level below replacement level.


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