An assessment of the own-children method of estimating fertility by birthplace in Australia

This paper examines the validity of the own-children method of fertility estimates derived from the 1991 Census by a detailed investigation of mortality assumptions, the presence of non-own children, age misreporting and undercount. A comparison of fertility measures derived alternatively from the census using the own-children method and from vital statistics for the period 1987–91 indicates remarkably similar rates for Australia-born women, and plausible results for long established migrant groups. The own-children fertility levels for some recently arrived migrant groups, however, were found to be misleading. It is suggested that the own-children method is useful for the study of differential current fertility in Australia. Revised version of an essay awarded the W.D. Borrie Prize (graduate section), 1997, and presented to the session: Advances in methods for the analysis of demographic data of the 23rd General Conference of the International Union for the Scientific Study of Population, 11–17 October, Beijing. This paper is based on the author’s PhD thesis entitled:Fertility patterns of Australian selected immigrant groups, 1977–91.     

Fertility among ethnic groups in the USSR

Thirty-six ethnie groups in the USSR are analyzed as to fertility differentials. The analysis is based on data from the 1959 nationwide census. To explain the fertility differentials found, ethnographic and sociological features of these groups are traced as a possible contributing factor. One of the poignant observations of the study is the fact that almost all ethnic groups with fertility above the median are those belonging to Moslem and Buddhist traditions. They are primarily located in the Central Asian republics, the Caucasus, and some parts of southern Siberia. Low fertility levels are by and large associated with the Eastern Orthodox Slavs and the Protestant Balts.Ratios of the number of children aged 0-9 to the number of women in the 20-49 age group are related to independent variables in the following order of importance: traditional religion, percentage of married women in the 20-49 age group, degree of literacy, male-female literacy differential, and sex ratio. The multiple correlation of 0.911 was obtained between the child-woman ratio and the first four of the most important independent variables. Sex ratio appeared significant only after the influence of the percentage of married women was eliminated from the analysis of multiple and partial correlations.The data suggest that the urban-rural differential is a non-linear function of the urban-rural migration. A more complete explanation of the divergence between urban and rural child-woman fertility ratios should be made the subject of separate studies.     

A local analysis of ethnic group population trends and projections for the UK

Projections of the UK’s ethnic populations from 2001 to 2051 show significant future change. Groups outside the White British majority will increase in size and share, not only in core areas but throughout the country. Ethnic minorities will shift out of deprived local authorities and into less deprived ones, while the White distribution remains stable. The share of the Mixed group population in the most deprived quintile (Q5) of local authorities reduces from 26 to 19%, while its share in the least deprived quintile (Q1) increases from 22 to 29%. The corresponding shifts for Asian groups are from 25 to 18% for Q5 and from 9 to 20% for the Q1. For Black groups the Q5 quintile sees a decrease from 54 to 39% while the Q1 sees an increase from 7 to 19%. There are shifts to local authorities with lower ethnic minority concentrations by Mixed, Asian and Black populations from local authorities with high ethnic concentrations, while the White, Chinese and Other group distributions remain in 2051 as they were in 2001. So, ethnic minority groups will be less segregated from the rest of the population in 2051 than in 2001. Indices of Dissimilarity between each group and the rest of the population fall by a third over the projection period. The UK in 2051 will be a more ethnically diverse society than in 2001.     

A new method for estimating the level of natural fertility in populations practicing birth control

The natural fertility schedule of a population is the schedule of age-specific marital fertility we would observe if no birth control were being practiced. In natural fertility (no birth control) populations we can observe the natural fertility schedule directly, but in populations practicing birth control the natural fertility schedule is disguised by the marital fertility rates in those age intervals in which control is exercised, the marital fertility rates being below the natural rates. This paper elaborates a method for estimating the natural fertility schedules of populations practicing birth control. Two alternative models are presented, one nonlinear and one linear. The use of these models is then illustrated with reference to the Old Order Amish population of Lancaster County, Pennsylvania. It is shown that for Amish women born between 1860 and 1900 both the nonlinear and linear models yield an estimate of .843 as the ratio between Amish and Hutterite natural fertility schedules.     

Below-replacement fertility of ethnic Indians in Fiji: a decomposition analysis of the components of changes in the total fertility rate

The population of Fiji consists of two major ethnic groups, Fijians and Indians; it also comprises other groups, such as Europeans, Chinese and other Pacific Islands. The 2007 Census showed that there were 56.8 % Fijians and 37.5 % Indians, with the remaining 5.7 % consisting of other groups. This paper examines ethnic variation in fertility using current fertility estimated directly from the census data. As the Fiji census continued to gather information on the relationship of mothers with their own children, this information has been used to estimate fertility trends over the past 15 years preceding the census by the application of the own-children method. Fiji has recently undergone a spectacular decline in fertility but with a marked variation between Fijians and Indians. The total fertility rate (TFR) among Indians dropped to 2.8 in 1986 and 2.5 in 1996. It continued to decline further, approaching below the replacement fertility of 1.9 in 2007. By contrast, Fijian fertility reached 3.9 in 1996. As with that of Indians, Fijian fertility also fell sharply, to 3.2 in 2007. This paper uses a decomposition analysis technique to determine the components of changes in the TFRs due to marital structure and marital fertility among Fijians and Indians, covering the intercensal periods, 1966–1976, 1976–1986, 1986–1996 and 1996–2007.     

Old-age security, religious celibacy, and aggregate fertility in a Tibetan population

Using the family system as a framework, this study investigates the connection between old-age security concerns and aggregate fertility in Sama and Lho, two ethnically Tibetan villages of highland Nepal. The microdemographic approach reveals a difference in family systems between the two villages that results in Sama having a significantly lower level of fertility than Lho. The key difference lies in the practice of Sama’s (but not Lho’s) householders of designating a daughter to be a nun, a strategy meant to retain female labour within the household and thereby guarantee a caretaker in old age. Although the effect of this practice on individual fertility is unclear, the comparison with Lho reveals how it sharply curtails aggregate fertility by preventing nearly one in five women from marrying. In this case the motivation to ensure old-age security acts as an unintentional preventive check on population growth. Comparisons with other societies illustrate how the population of Sama combines elements of both the historical European and Asian demographic experiences.     

A method of estimating the time of marital fertility decline and associated parameters

Significant research attention has been given to historical patterns of marital fertility transitions in currently industrialized countries. Specifically, studies consider the time of the onset of fertility decline and its distribution among populations or population subgroups; the distribution of pre-decline parital fertility levels; and/or the rate of marital fertility decline. Analyses of pre-decline fertility level and its rate of decline, however, depend upon the procedure used to estimate the time of fertility decline. The Princeton European Fertility Project is the most prominent historical fertility study ever conducted. The procedure employed to estimate the timing parameter in these Princeton studies is described. An alternative statistical procedure is then proposed for detecting the onset of the transition from high to low marital fertility; the method may also be used to find the termination point of decline where the sequence of fertility variables is long enough. Both methods produce maximum likelihood least squares estimates, but the form proposed in the text has conceptual advantages.     

The use of hypothetical cohorts in estimating demographic parameters under conditions of changing fertility and mortality

The indirect methods of demographic estimation available to date are often inadequate to estimate levels in the presence of trends. The use of measures relative to hypothetical cohorts to minimize the effectsoftrends and estimate period levels is described. Procedures allowing the estimation of intersurvey levels of fertility, child mortality and adult mortality are illustrated using data from Thailand and Peru.     

Economic fortunes, ethnic divides, and marriage and fertility in Central Asia: Kazakhstan and Kyrgyzstan compared

Declining marriage and fertility rates following the collapse of state socialism have been the subject of numerous studies in Central and Eastern Europe. More recent literature has focused on marriage and fertility dynamics in the period of post-crisis political stabilization and economic growth. However, relatively little research on marriage and fertility has dealt with the Central Asian part of the post-socialist world. We use survey and published data from Kazakhstan and Kyrgyzstan, two multiethnic countries with differing paths of post-crisis recovery, to examine overall and ethnic-specific trends in entry into marriage and fertility. We find that in both countries rates of entry into marriage continued to decline throughout post-crisis years. By contrast, fertility rose, and this rise was greater in the more prosperous Kazakhstan. However, we also detect considerable ethnic variations in fertility trends which we situate within the ethnopolitical and ethnodemographic contexts of both countries.     

A method for comparative analysis of fertility dynamics represented by sequences of fertility schedules

A method to compare fertility sequences, each of which represents a cyclical fluctuation around an underlying trend, is presented. Each fertility sequence is viewed as composed of a time trend in childspacing pattern and a corresponding trend in terminal fertility rate. The procedure involved in comparing each component of one fertility sequence with the corresponding component of another is described and illustrated. Using hypothetical data it is shown, among other things, that ifA andB are two cyclical fluctuations in fertility such that (i) the cycles in both are of the same length, (ii) the terminal fertility components of the two are identical, and (iii) the trend in the mean age at childbirth associated withA is higher than the corresponding trend associated withB, then, replacingB withA need not necessarily result in lowering the long-run rates of increase in the birth sequence.     

The bogue-palmore technique for estimating direct fertility measures from indirect indicators as applied to Tennessee counties, 1960 and 1970

Bogue and Palmore's technique for estimating direct fertility measures from indirect indicators IS applied to the 95 counties of Tennessee 1960 and 1970. Findings based on these data tentatively suggest that this technique may be better suited for cross-national research than for analysis of small population units. It is recommended that the "own child" method is more appropriate for estimating fertility when utilizing data on counties.     

Biodemographic modeling of the links between fertility motivation and fertility outcomes in the NLSY79

In spite of long-held beliefs that traits related to reproductive success tend to become fixed by evolution with little or no genetic variation, there is now considerable evidence that the natural variation of fertility within populations is genetically influenced and that a portion of that influence is related to the motivational precursors to fertility. We conduct a two-stage analysis to examine these inferences in a time-ordered multivariate context. First, using data from the National Longitudinal Survey of Youth, 1979, and LISREL analysis, we develop a structural equation model in which five hypothesized motivational precursors to fertility, measured in 1979–1982, predict both a child-timing and a child-number outcome, measured in 2002. Second, having chosen two time-ordered sequences of six variables from the SEM to represent our phenotypic models, we use Mx to conduct both univariate and multivariate behavioral genetic analyses with the selected variables. Our results indicate that one or more genes acting within a gene network have additive effects that operate through child-number desires to affect both the timing of the next child born and the final number of children born, that one or more genes acting through a separate network may have additive effects operating through gender role attitudes to produce downstream effects on the two fertility outcomes, and that no genetic variance is associated with either child-timing intentions or educational intentions.     

Equality and fertility in the kibbutz

The kibbutz' quest for equality makes a member's consumption independent of his contribution to production, and the kibbutz itself responsible for almost all childrearing expenses. This fundamental departure from the standard organization of economic life of course affects fertility. We find that a parent's predicted wage (as determined by the parent's individual characteristics) has a smaller positive effect on fertility in the city than in the kibbutz, and that a parent's education has a negative effect on fertility in the city and either a smaller negative effect or no effect in the kibbutz.Correspondence to Leif Danziger.We thank the referees and Alessandro Cigno for helpful comments. Leif Danziger acknowledges the financial support from the Faculty of Arts, York University.     

Determinants of fertility and the unmet need for family planning in Indonesia

Indonesia's fertility has declined to an average of slightly more than 3 children/woman. The islands of Java and Bali have the lowest birth rates. Indonesia's family planning program has been a model of innovation, flexibility, and community involvement, and has been effective in reducing fertility, changing family preferences, and increasing contraceptive use. Fertility decline is also determined by factors other than contraceptive use, as provinces in Jakarta and East Java has low fertility and low contraceptive use. Recent research by Suyono and Palmore found that among cohorts of women in Jakarta lowest fertility rates were explained by greater nonexposure to pregnancy in an unmarried state or by a divorced or widowed status, and by infecundity. In East Java, fertility determinants were the same with the possible addition of lower coital frequency. The study estimated nonexposure due to marriage, infecundity, and contraceptive use. Policy considerations, however, are concerned with the exposed state of the percentage of time women are currently married, fecund, not using contraceptive, and sexually active. Suyono and Palmore also calculated the percentage of time spent in the exposed state by province. The estimates ranged from 12% in Yogyakarta to 25% in West Java and the Outer Islands. Exposed was further divided into groups with a manifest, latent, and no current need. Women with a manifest need for family planning are those who are aware of their contraceptive needs to stop or postpone childbearing and not using. Manifest need was highest in high fertility areas: 12% in Central Java, 13% in West Java, and 12% in the Outer Islands. Programs targeting these women should focus on wider availability of information and services. Women with latent needs are unaware of their need for family planning and are not using contraception. These women were also concentrated in high fertility areas. The percentage of years spent in the latent unmet need state was estimated at 23-24% in West Java and the Outer Islands. Program emphasis should be on education and motivation to show how family size can be controlled. Women with current need can be educated toward future acceptance.     

Urbanization and the fertility transition in Ghana

This paper examines the way in which migration and urban residence operate to alter fertility outcomes. While urban-rural fertility differentials have long been established for most developing societies, the nature of these differences among migrants and between migrants and those of succeeding generations is not well understood. The evidence presented here suggests that rural-urban migration and urbanization may contribute positively to processes of fertility transition. Using data from the 1998 Kumasi Peri-Urban Survey, which included a 5-year retrospective monthly calendar of childbearing, we suggest that migrants adapt quickly to an urban environment. Our results also reveal generational differences in recent and cumulative fertility. While migrants exhibit higher cumulative fertility than urban residents of the second and third generation, their fertility is significantly lower than rural averages in Ghana. Children of migrants exhibit childbearing patterns quite similar to those in higher-order generations. Most noteworthy is the nature of the disparities in childbearing patterns between migrants and the succeeding generations. Migrant women have higher lifetime fertility than urban natives. Migrant women also exhibit higher fertility over the last 5 years than second generation or high-order urban natives. But these first generation women exhibit lower fertility (vs. urban natives) for the year immediately prior to the survey. These patterns lend support to an interpretation that combines rather than opposes theories of selectivity, disruption, adaptation and socialization. We conclude by discussing mechanisms that might explain these interrelated processes of fertility adjustment and suggest that policies discouraging rural-urban migration need to be revisited.     

Reporting of fertility events by men and women in rural Gambia

We conducted a survey of male and female fertility in rural villages in The Gambia and compared men and women's reports of recent pregnancy events in the aggregate and of children ever born for matched couples. Despite widespread polygyny and sex differences in fertility, men's and women's reports were similar. Small sex differences in reports of recent stillbirths and neonatal deaths were found. For matched couples, husbands reported 0.23 more children ever born than their wives on average, but discordant reporting had little effect on recent marital fertility rates. Modeling of discordant reports indicates that fertility reports are more likely to be underestimated by both men and women for their earliest marriages. Reliable fertility data can be collected from men in this population.     

Family limitation and the fertility transition: Evidence from the age patterns of fertility in Europe and Asia

Summary The age patterns of marital fertility levels and decline in modern Asia and historical Europe are analysed in order to answer two questions: (1) How closely do the age patterns of marital fertility in both areas prior to a systematic fertility decline conform to the age pattern of natural fertility? (2) How similar are the age patterns of the fertility transition experienced in Europe in the past, and the age pattern of fertility decline now under way in a number of Asian populations? The answers have important implications for our understanding of the fertility transition. They suggest that modern family limitation (i.e. parity-specific fertility control) was largely absent prior to a secular decline in marital fertility in both Europe and Asia. Furthermore, the evidence indicates that once the practice of family limitation starts to spread among the broader strata of the population, it seems almost inevitably to increase until it becomes a common behavioural norm. In this respect, the modern fertility transition appears to result from the spread of innovative behaviour and cannot be viewed simply as an adjustment to new socio-economic circumstances based on previously established behavioural mechanisms.     

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.