Determining the impact of sex preferences on fertility: A consideration of parity progression ratio,dominance, and stopping rule measures

The two methods commonly used to assess the effect of sex preferences on fertility are inadequate to the task. Parity progression ratio analyses suffer from logical problems stemming from the heterogeneity of sex preferences and the riskiness of fertility decisions. While conjoint measurement-dominance procedures overcome these logical problems, they cannot yield quantitative estimates of the impact of sex preferences on fertility. A stopping rule measure which overcomes these limitations is proposed and described and its potential for determining the effect of sex predetermination methods on population is discussed.     

Completing the fertility transition in the developing world: The role of educational differences and fertility preferences

This study summarizes patterns of educational differentials in wanted and unwanted fertility at different stages of the fertility transition. The data are from Demographic and Health Surveys in 57 less developed countries. As the transition proceeds, educational differentials in wanted fertility tend to decline and differentials in unwanted fertility tend to rise. An assessment of fertility patterns in developed and less developed countries with low fertility concludes that these differentials are likely to remain substantial when less developed countries reach the end of their transitions. This conclusion implies that the educational composition of the population remains a key predictor of overall fertility in late transitional countries and that low levels of schooling can be a cause of stalling fertility.     

Completing the fertility transition in the developing world: The role of educational differences and fertility preferences

This study summarizes patterns of educational differentials in wanted and unwanted fertility at different stages of the fertility transition. The data are from Demographic and Health Surveys in 57 less developed countries. As the transition proceeds, educational differentials in wanted fertility tend to decline and differentials in unwanted fertility tend to rise. An assessment of fertility patterns in developed and less developed countries with low fertility concludes that these differentials are likely to remain substantial when less developed countries reach the end of their transitions. This conclusion implies that the educational composition of the population remains a key predictor of overall fertility in late transitional countries and that low levels of schooling can be a cause of stalling fertility.     

A further note on the relation between economic development and fertility

The relationship between economic development and fertility has been examined by several scholars. In particular Heer, using data from 41 nations (24 developing and 17 developed) tested three hypotheses. His objective was to reconcile the two prevailing views in this context, namely, that economic development on one hand promotes and on the-other inhibits fertility. However, when we reran Heer’s data separately for the two groups of countries in his list, the pattern of relationships between the variables that he used changed significantly. On this basis, we restricted this study to a further examination of his three hypotheses using data from developing nations only but for two points in time. The evidence from this study seems to support two of the hypotheses in Heer’s study. In other words, whether the analysis of this relationship is restricted to developing nations or includes both developed and developing nations, it remains true that increased economic development implies a decreased illiteracy and a decreased IMR; a decreased illiteracy and IMR are optimal conditions of low fertility. Nonetheless, the data examined here do not seem to resolve the question of whether increased economic development implies a decreased fertility. Accordingly, continued testing of the hypothesis at further points in time with more accurate data is in order.     

经济因素与生育率关系新探——来自西安市长安区农村的实地调查

经济因素对生育率具有重要的影响，但经济因素对生育率的影响是通过中间变量来实现的．笔者对西安市长安区农村调查所得数据做了分析，得出经济发展引发的宏观结构变化为生育率的下降提供了基本条件．而生养成本上升和农民的相对贫困既是抑制生育率上升的因素，也是生育率不能进一步下降的原因的结论。     

Changes in fertility in Japan by region: 1920–1965

Changes in fertility for the 46 prefectures of Japan are traced from 1920 to 1965, using census and vital statistics. During the period, substantial declines were recorded in both marital-fertility levels and the proportions of women of childbearing age who were married. Regional variation is pronounced in the timing of the onset of the decline in marital fertility. Only in the most industrialized districts did marital fertility begin to fall before 1950; thereafter, sharp declines were recorded in all parts of Japan. The marriage proportion, in contrast, was falling rather steadily throughout the islands between 1920 and 1950, after which the proportion stabilized. The decline in overall fertility that occurred before 1950was caused, then, primarily by a reduction in the proportion married; only after 1950 did a decline in marital fertility become a. major factor. The time pattern of change in marital-fertility levels and proportions married for Japan differs from that observed in western Europe, where low proportions married are recorded in the earliest national censuses. Apparently a fall in proportions married in western Europe preceded by one or two centuries the major sustained declines in marital fertility that were part of the so-called demographic transition.     

Sex preferences and fertility in South Korea during the year of the horse

Since antiquity, people in several East Asian countries, such as China, Japan, and South Korea, have believed that a person is destined to possess specific characteristics according to the sign of the zodiac under which he or she was born. South Koreans, in particular, have traditionally considered that the year of the Horse bears inauspicious implications for the birth of daughters. Using monthly longitudinal data at the region level in South Korea between 1970 and 2003, we found that in the year of the Horse, the sex ratio at birth significantly increased while fertility decreased.     

On the relation between economic status and family size preferences when status differentials in contraceptive instrumentalities are eliminated

Abstract In this paper an attempt is made to formalize the essential elements of a theory of reproductive motivation outlined by Judith Blake in a recent article. On the basis of the results of that exercise, it is argued that the theory, as it stands now, is not specific enough to 'predict' whether the affluent would choose to have fewer children than the poor, if contraceptive instrumentalities were to be equalized among the economic strata. It is also argued that the negative (though weak) association between ideal family size and economic status and the non-negative association between desired number of children and economic status, observed in survey data, are both consistent with the basic premisses of the theory under reference.     

Interrelations between migration and fertility in Thailand

Based on special tabulations of 1960 census data on migration within Thailand, this analysis attempts to assess the role of migration in the urbanization process and the relation between migration and fertility. The importance of migration to urban growth is evidenced by the clearcut positive relationship between the percentage of persons classified as either lifetime or 5-year migrants and the urban character of their 1960 place of residence. Yet, the evidence also points to an increasing proportion of urban growth in recent decades attributable to natural increase. The specific relation between fertility and migration varies depending on the measure of migration used: Compared to nonmigrants in their place of destination, the fertility levels of lifetime migrants are not very different; but those of 5-year migrants are considerably lower. Regardless of migration status, however, fertility level is markedly lower for those living in urban places compared to those in rural places. This suggests the important role of both migration and urbanization in affecting fertility levels in Thailand.     

The heterogeneous effects of socioeconomic and cultural factors on fertility preferences: evidence from Rwanda and Kenya

Journal of Population Research - This research uses the latest Demographic and Health Surveys to investigate the heterogeneity of effects of socioeconomic and cultural factors on fertility...     

The use of fourier analysis to express the relation between time variations in fertility and the time sequence of births in a closed human population

A fundamental theorem of mathematical demography states that two closed populations sharing the same extended history of net fertility, no matter how variable, have the same age composition. In consequence, when in any population net fertility has long followed a purely repetitive cycle, age composition must also be repetitive with the same cycle length. Under these conditions annual births follow a path that is an exponential multiplied by a periodic time-function. If the time variation of fertility is a small amplitude sinusoidal oscillation, the periodic component of the birth sequence is also sinusoidal. The relative amplitude and timing of fertility oscillations and the consequent birth fluctuations are functions of the duration (or frequency) of the fertility cycle; the nature of the functions is determined by the age structure of net fertility.Any time sequence of fertility variation over an extended period of time can be treated as if part of a repetitious cycle of very long duration. By Fourier analysis the fertility sequence can be expressed as the sum of a series of sinusoidal terms; and finally the sinusoidal components of the resultant birth sequence can be derived. The calculated birth sequence closely approximates the actual.     

On the use of the truncated Gompertz distribution and other models to represent the parity progression functions of high fertility populations

The Gompertz distribution, developed from the mortality “law”; long used by actuaries and demographers promises to be a useful distribution for many other demographic purposes as well. The continuous distribution can also be adapted to represent discrete data commonly encountered in demographic work, and maximum likelihood estimates of the two parameters are easily calculated using formulae developed in this paper, whether those data be continuous or discrete, truncated below or provided with observations in a final open‐ended interval.

The distribution is unimodel. The use of the truncated form of the distribution, however, allows the researcher to fit it to a wider range of observed distributions, including many for which the density function is monotonic decreasing.

Empirical studies using parity progression data of two high fertility populations indicate that the truncated Gompertz distribution in its discrete form provides a good overall picture of the parity distribution. Interestingly, the simple method of partial sums, commonly employed to fit the Gompertz function, appears to provide parameter estimates which are close to those estimated by maximum likelihood.     

Consistency between fertility attitudes and behaviour: A conceptual model

Abstract The consistency (or lack of it) between attitude and behaviour has been a controversial issue in social psychology for the past several decades,(1) and more recently has become a focus of considerable controversy in the field of population studies.(2) In accordance with Freedman, Hermalin and Chang,(3)it is argued here that this controversy will not be resolved by theoretical discussions, and evidence is needed from many countries at several time points to resolve this issue. This paper presents evidence on consistency between fertility attitudes and behaviour from survey data from Venezuela and, based upon analysis of the present data, suggests a conceptual model for the study of consistency between fertility attitudes and behaviour.     

Consistency between fertility attitudes and behaviour: A conceptual model

The consistency (or lack of it) between attitude and behaviour has been a controversial issue in social psychology for the past several decades,¹ and more recently has become a focus of considerable controversy in the field of population studies.² In accordance with Freedman, Hermalin and Chang,³it is argued here that this controversy will not be resolved by theoretical discussions, and evidence is needed from many countries at several time points to resolve this issue. This paper presents evidence on consistency between fertility attitudes and behaviour from survey data from Venezuela and, based upon analysis of the present data, suggests a conceptual model for the study of consistency between fertility attitudes and behaviour.     

The relation of economic class and fertility: An analysis of some Indonesian data

Summary Many recent fertility studies in developing societies put forward the hypothesis of a negative relation between economic class and fertility. Data showing a positive relationship are frequently dismissed a priori as resulting from the reporting errors of illiterate women. This study draws on data from Indonesia's 1971 Census, a 1973 sample survey of fertility and mortality, and an intensive community study in Java, to argue that an observed positive relation between class and fertility is real, and is related to differences in patterns of marital disruption, postpartum abstinence, and fecundity. The positive relation may be reversed in the future as changes in these patterns, and the impact of the national family planning programme, affect the family structure of each class differently. Had the positive relation in this context been attributed offhand to reporting errors, these important socio-economic changes would have been misunderstood, and possibly ignored.