An Increase in the Sex Ratio of Births to India‐born Mothers in England and Wales: Evidence for Sex‐Selective Abortion

Male preference in many Asian cultures results in discriminatory practices against females, including neglect and infanticide. This preference, together with the availability of prenatal sex determination and sex‐selective abortion, has led to an increase in sex ratios at birth in China, India, and South Korea. The resulting expected gender imbalances raise ethical, demographic, and social concerns. We analyzed birth statistics to see whether similar trends are apparent among births to foreign‐born mothers in England and Wales. Before 1990, sex ratios at birth were consistently nearly one point lower (104) for the three major Asian groups in Britain compared with mothers born in Western countries. This is inconsistent with previous suggestions that Asian populations have a higher “natural” sex ratio at birth. In the birth statistics since 1990, we find a four‐point increase in the sex ratio at birth for mothers born in India, attributable particularly to an increase at higher birth orders, mirroring findings reported for India. This suggests that sex‐selective abortion is occurring among mothers born in India and living in Britain. By contrast, no significant increase was observed for Pakistan‐born and Bangladesh‐born mothers, among whom male preference also exists. It seems that male preference in different cultures does not necessarily lead to sex‐selective abortion.     

The Sex Ratio Transition in Asia

This article adopts a comparative perspective to review the recent increase in the sex ratio at birth (SRB) across Asia. It first describes and compares the most recent birth statistics in Asia in order to identify commonalities in the gradual rise of SRBs observed from Armenia to South Korea. This comparison provides the basis for identifying specific transition patterns in the changes in SRBs. Their recent rise is then interpreted in a social and historical framework borrowed from fertility decline and based on three preconditions: access to sex‐selection technology, preference for male births, and pressure from low fertility. On a broader plane, the process of growing imbalances in the sex composition of the population gives rise to a tragedy of the commons. This article indicates the factors that appear most likely to trigger a turnaround in this transitional demographic situation and to facilitate a return to biologically normal sex ratios in the future.     

生育水平、性别偏好和出生性别比——兼论出生性别比的监测方法

本研究以马-冯-陈模型为定性基础,认为一定人口的出生性别比并非固定不变,而是受到生育水平的影响。当无性别偏好时,生育水平主要通过改变不同孩次占出生人口比例的方式影响出生性别比;当有性别偏好时,生育水平既影响不同孩次占总出生人口的比例,又影响不同孩次的出生性别比,从而对总出生性别比产生影响。对于没有性别偏好和性别选择行为的人口,生育水平变化是引起出生性别比波动的主要原因。有性别选择行为时,生育水平变化对出生性别比的影响较小,性别选择行为是出生性别比异常的主要原因。监测以"曾生子女孩次和性别次序"为条件划分的人群,可以有效而便捷地判断出生性别比变化趋势。     

Does the marriage market sex ratio affect parental sex selection? Evidence from the Chinese census

Recent increases in the (male/female) sex ratio at birth in eastern Asia are thought to be associated with a preference for sons and to result from parental sex selection. However, males are less likely to marry and to have offspring as the ratio increases, and that decreases the expected number of grandchildren. Using data from the 2000 Chinese census, we test whether the sex ratio in the marriage market has an effect on the gender of subsequent births and hence on the sex ratio of the birth cohort. The slow population growth caused by the Great Famine in the early 1960s and the quick recovery that followed produced major changes in the sex ratio for those of marriageable age two decades later. We estimate that an increase of 1 % in the number of marriageable males relative to females, the marriage market sex ratio, would decrease the probability of having a son by 0.02 percentage points. That implies that the Great Famine, which occurred around 1960, led to an increase in the early 1980s of 5.8 extra male births per 100 females.     

The Decline of Son Preference in South Korea: The Roles of Development and Public Policy

For years, sex ratios at birth kept rising in South Korea despite rapid development. We show that this was not an anomaly: underlying son preference fell with development, but the effect of son preference on sex ratios at birth rose until the mid‐1990s as a result of improved sex‐selection technology. Now South Korea leads Asia with a declining sex ratio at birth. We explore how son preference was affected by development and by public policy. Decomposition analysis indicates that development reduced son preference primarily through triggering normative changes across society—rather than just in individuals whose socioeconomic circumstances had changed. The cultural underpinnings of son preference in preindustrial Korea were unraveled by industrialization and urbanization even as public policies sought to uphold the patriarchal family system. Our results suggest that child sex ratios in China and India may decline before those countries reach South Korean levels of development, since the governments of both countries vigorously promote normative change to reduce son preference.     

The imbalance of sex ratio at birth,and its causes and countermeasures in China

This news brief focuses on the sex ratio at birth (SRB) in China, its causes, and remedial efforts. A SRB has been evident since the 1980s. The SRB increased from 108.48 male/100 female births to 116.30 male/100 female births during 1981-94. A normal SRB in China during 1940-94 would have been 107 male/100 female births. The SRB rose every year after 1985, with the exception of 1988. Male births increased, while female births decreased. SRB declined with age. The sex ratio in 1991, was 112.3 for children aged 0-4 years, 108.38 for children aged 5-9 years, and 106.56 for children aged 10-14 years. SRB values were higher in more populous provinces and lower in less populous provinces. SRB values were lower in northwestern China than in southeastern China. SRB values of minorities were lower than the Han ethnic group. A high SRB will increase the proportion single in later years. In 1990, 7.86 million people aged 30-40 years were single, of whom 94.32% were males. The SRB is caused by second, third, or higher birth orders. In 1993, sex ratios were 105.60 for first births, 130.22 for second births, and 126.12 for third births. The imbalance is attributed to a preference for sons as inheritors of blood ties and as family physical laborers. The imbalance is due to strict birth control and people's refusal to report female births. There is a need to increase awareness of the consequences, to increase old-age pensions and social security, to increase women's status, and to prohibit sex determination of a fetus. The family structure should emphasize its consumptive capacity rather than its function as a production unit.     

High Sex Ratios at Birth in the Caucasus: Modern Technology to Satisfy Old Desires

During the 1990s, the sex ratio at birth increased considerably and simultaneously in the three independent Caucasian countries, Armenia, Azerbaijan, and Georgia. At the end of the first decade of the twenty‐first century, levels remain abnormally high in Armenia and Azerbaijan (above 114 male births per 100 female births) and show erratic trends in Georgia. Analyzing data from demographic surveys carried out around 2005, we confirm the persistence of high sex ratios in these three countries and document significant differences in fertility intentions and behavior according to the sex of the previous child or children that constitute evidence of the practice of sex‐selective abortion. These countries combine societal features and medical systems that make this phenomenon possible: son preference in a context of low fertility and the possibility of prenatal sex selection given easy access to ultrasound screening and induced abortion. Why high sex ratios are observed only in these three countries of the sub‐region remains, however, an open question.     

Old Habits Die Hard? Lingering Son Preference in an Era of Normalizing Sex Ratios at Birth in South Korea

South Korea was among the first countries to report both an abnormally high sex ratio at birth (SRB) and its subsequent normalization. We examine the role of son preference in driving fertility intentions during a period of declining SRB and consider the contribution of individual characteristics and broader social context to explaining changes in intentions. We employ data from the National Survey on Fertility, Family Health and Welfare that span 1991–2012. We find that reported son preference declined to a great extent but remained substantial by the end of the observation period, and that the intention to have a third child still differed by sex of existing children. Change in individual-level factors does not explain the decline in son preference, suggesting that broad social changes were also important. This study provides a better understanding of how son preference evolves in the post-transitional context of very low fertility.     

Son preference, sex selection, and kinship in Vietnam

This article examines the recent rise in the sex ratio at birth in Vietnam and relates its emergence to kinship systems and ethnic composition using 2009 census micro-data. Presentation of the main socioeconomic and ethnic differentials in birth masculinity is followed by a review of the three intermediate factors leading to increases in the sex ratio at birth: prenatal technology, declining fertility, and gender bias. An indirect measurement of fertility behavior is used to demonstrate the close association between levels of the sex ratio at birth and the intensity of son preference. Data on household composition indicate that Vietnam is characterized by the co-existence of kinship patterns typical of East and Southeast Asia. Son preference in Vietnam is found to be related to the prevalence of more traditional patrilineal systems. The article concludes by considering the implications of the cultural dimensions of prenatal sex selection for policy responses and for the likely future change in the sex ratio at birth.     

外来人口对中国城市地区出生性别比的影响

外来人口对中国城市地区出生性别比的影响是近年来学术界争论的焦点问题之一。利用2000年人口普查数据,通过比较农村本地人口、城市本地人口和城市外来人口三个人口群体在出生性别比上的差异,并进行多元统计分析,考察20世纪90年代以来中国城市地区异常偏高的出生性别比是否由外来人口造成?结果表明,城市外来人口生育的性别偏好与农村本地人口和城市本地人口相比没有显著差异,都存在强烈的生男意愿。20世纪90年代以来中国生育水平迅速下降的同时,出生性别比出现了不分城乡的普遍升高和偏高,城市出生性别比偏高,既有外来人口的作用,也有本地人口的作用,外来人口并不是造成中国城市地区出生性别比偏高的唯一或主要的原因。     

Sex‐Selective Abortions in India

Provisional estimates from the 2001 census of India, which showed unusually high sex ratios for young children, have sparked renewed concern about the growing use of sex‐selective abortions to satisfy parental preferences for sons. According to the 1998–99 National Family Health Survey (NFHS‐2), in recent years the sex ratio at birth in India has been abnormally high (107–121 males per 100 females) in 16 of India's 26 states. Data from NFHS‐2 on abortions, sex ratios at birth, son preference, and the use of ultrasound and amniocentesis during pregnancy present compelling evidence of the extensive use of sex‐selective abortions, particularly in Gujarat, Haryana, and Punjab. The authors estimate that in the late 1990s more than 100,000 sex‐selective abortions of female fetuses were being performed annually in India. Recent efforts to expand and enforce government regulations against this practice may have some effect, but they are not likely to be completely successful without changes in the societal conditions that foster son preference.     

Evidence for an Incipient Decline in Numbers of Missing Girls in China and India

The apparently inexorable rise in the proportion of “missing girls” in much of East and South Asia has attracted much attention among researchers and policymakers. An encouraging trend was suggested by the case of South Korea, where child sex ratios (males to females under age 5) were the highest in Asia but peaked in the mid‐1990s and normalized thereafter. Using census data, we examine whether similar trends have begun to manifest themselves in the two most populous countries of this region, China and India. The data indicate that child sex ratios are peaking in these countries, and in many subnational regions are beginning to trend toward lower, more normal values. This suggests that, with continuing economic and social development and vigorous public policy efforts to reduce son preference, the “missing girls” phenomenon could eventually disappear in Asia.     

Ten Thousand Tonga: A Longitudinal Anthropological Study from Southern Zambia, 1956–1991

The Gwembe Study was launched in 1956 to monitor the responses of 57,000 Tonga-speakers from the Middle Zambezi Valley to involuntary relocation. Since then, periodic censuses and frequent field visits have generated a wide variety of information. This article examines the demography of four Gwembe Tonga villages from 1956 to 1991, a period characterized first by relocation, then prosperity, and finally by economic hardship. White nuptiality does not respond significantly to socio-economic trends, marital fertility falls sharply during relocation, rebounds with the onset of prosperity, and decreases slowly during the most recent decade of economic hardship. Mortality of the very young and old is also sensitive to such changes. There is striking excess male mortality in all periods, especially among male infants and in particular male twins. The sex ratio at ‘birth’ is 92. This abnormal sex ratio at birth may be the result of conscious sex preference favouring females.     

世界各国的人口出生性别比及其启示

利用联合国《人口年鉴》出生统计专辑汇集的世界各国多年的人口出生数据,对全球不同类型国家近20年来人口出生性别比的统计特征和动态趋势进行描述和概括,以尝试着反映人类人口出生性别比的一般规律及特点,为更客观、准确地认识中国人口出生性别比失常提供背景与基础。     

Measuring the effect of sex preference on fertility: The case of Korea

Preferences for male or female children or a balanced number of sons and daughters are common throughout the world. The dominant preference is for male offspring, particularly in less developed countries. Strong son preference is often tempered, however, by a desire to have at least one child of each sex. In more developed countries a balance preference is more common, often together with a strong preference for the first child to be a son. Although it is usually assumed that sex preference can substantially influence fertility, some analysts argue that the effect is negligible. An intermediate position is taken by those who say that sex preference may not have much impact at high fertility levels, but that as average family sizes begin to fall, sex preference will become a more important factor in fertility decisions. Despite the keen interest that has been shown in sex preference, there is surprisingly little empirical evidence of its effects on fertility. Moreover, much of the research in this area is methodologically weak. The measures that have been used in the past have been subject to a number of criticisms that call their results into question. This paper proposes a new measure of the effect of sex preference on fertility that avoids many of the problems inherent in other methods. The measure is based on widely available survey data on the sex composition of children and can be used with any measure of fertility or family planning. It can handle any type of sex preference and does not assume a linear relationship between sex preference and fertility.(ABSTRACT TRUNCATED AT 250 WORDS)     

The desire for a son is the father of many daughters: a sex ratio paradox

This paper investigates the impact of preferences for male offspring to female offspring upon the sex ratio of the population. Asymmetric procreation behaviour of this kind is modelled by assuming that a female's procreation ceases only after at least one son or n daughters are born. It is shown that such asymmetric procreation behaviour has no effect on the sex ratio of the society, but influences rather the growth rate of the population. Finally, problems concerning the interrelationship between the sex ratio, the pattern of procreation, and the marriage régime in stationary populations are investigated.Financial support of the Norwegian Research Council (Ruhrgas scholarship scheme) is gratefully acknowledged. I am indebted to two anonymous referees for critical comments, to Gustav Feichtinger for hints to the literature, and to Sabrina Bird, Elizabeth Harrison and Corey Spellman for suggestions to improve my English style.     

Gendering family composition: Sex preferences for children and childbearing behavior in the Nordic countries

It has been argued that a society's gender system may influence parents' sex preferences for children. If this is true, one should expect to find no evidence of such preferences in countries with a high level of gender equality. In this article, we exploit data from population registers from Denmark, Finland, Norway, and Sweden to examine continuities and changes in parental sex preferences in the Nordic countries during the past three to four decades. First, we do not observe an effect of the sex of the first born child on second-birth risks. Second, we detect a distinct preference for at least one child of each sex among parents of two children. For third births, Danish, Norwegian, and Swedish parents seem to develop a preference for having a daughter, while Finns exhibit a significant preference for having a son. These findings show that modernization and more equal opportunities for women and men do not necessarily lead to parental gender indifference. On the contrary, they may even result in new sex preferences.     

中国出生性别比转变的人口老龄化后果：前景与对策

从1980年代开始,中国出生性别比失衡已经持续40余年,预计到2050年左右才能恢复正常。长达70年的出生性别比转变对中国人口和社会都产生深远的影响。以往研究主要集中探讨性别失衡问题,对出生性别比升高加剧人口老龄化的关注较少。为此,利用新近估计的中国出生性别比、生育率和死亡率数据,借助人口模拟预测和稳定人口比较分析的方法对中国出生性别比转变的人口老龄化后果进行深入考察。研究发现,出生性别比上升不仅会减少女婴出生数,还会减少男婴出生数,由此造成人口规模的下降并加剧了中国的人口老龄化。引导出生性别比尽快回归正常可以缓解人口老龄化,继续加强出生性别比治理可以在中国积极应对人口老龄化的过程中起到重要作用。     

‘Maternity migration’ and the increased sex ratio at birth in Hong Kong SAR

The sex ratio at birth (SRB) in Hong Kong SAR (Special Administrative Region) has recently increased dramatically. Using a data set (N = 850,331) of all recorded births in Hong Kong between 1995 and 2009, we calculated SRBs by parity and immigrant status. The findings indicate a strong son preference among Mainland Chinese who have travelled to Hong Kong to give birth, especially at parity two or above. Logistic regression models show that this tendency is significantly greater among more affluent couples and remains strong even among Mainland Chinese women resident in Hong Kong for any length of time. The SRB of Hong Kong-born couples, though elevated at higher parities, is less skewed. Hong Kong has been serving as an outlet for ‘elite’ Mainland couples to circumvent family planning restrictions. The analysis also suggests the advantages of a wider set of immigrant variables over a binary construct.     

当前我国出生性别比异常的经济学思考

我国出生性别比偏高的问题近几年愈演愈烈,被广泛关注的范围已经从学术界扩大了整个社会。本文拟就从产生问题的根源——男孩偏好以及隐藏在其背后的男女孩儿预期效用迥异入手,提出对当前已有政策的一些修正方案。笔者认为:诚如许多专家学者指出,问题产生的根本原因是文化因素——男孩偏好,但是问题解决的根本出路绝不能仅限于男女平等,而应该实行对女孩的积极的性别歧视。