bluuebunny/crossref_metadata_2025_split huggingface dataset:
Differential Life-Styles between Migrants and Nonmigrants: A Case Study of the City of Shiraz, Iran
Authors: Paydarfar All A. 
Published: March 2007

Abstract
The migration pattern to Shiraz, a southern city of Iran, is not consistent with the general pattern observed in cities of the other developing nations. Migrants to Shiraz are largely from other cities, and they are more advanced educationally and socioeconomically and less traditional than native Shirazi. This study is based on 1,061 interview cases collected at random. The sample consists of 612 nonmigrants, 125 rural migrants and 324 urban migrants. These groups were compared on thirtyfour indices measuring various facets of the respondents’ life-styles. The three groups differed statistically on most of the indices. Fatalism and possession of modern appliances were the most important factors differentiating the three groups.
The use of public transportation in urban areas: Toward a causal model
Authors: Mamon Joyce A. , Marshall Harvey 
Published: March 2007

Abstract
In this study, using the statistical models recently introduced by Goodman, we analyze the reasons why individuals choose the car or public transportation for the journey to work and draw out some of the implications of our analysis for public policy. Building on the work of Schnore, we develop a model in which both structural and individual variables are interrelated and show that the structural contexts within which individuals make decisions about their choice are crucial. We also show that, while status differentials are largely accounted for by income differences, male preferences for the automobile tend not to be due either to the structural variables or to income differences. Our findings suggest that present policies designed to induce people to shift to public transportation for the journey to work are not likely to be effective, since they do nothing to alter present cost differentials between the two modes.
Wife’s employment and cumulative family size in the United States, 1970 and 1960
Authors: Weller Robert H. 
Published: March 2007

Abstract
Using a multiple classification analysis of the data from the I percent public-use samples of the 1960 and 1970 censuses of population, it is found that the negative relationship between wives’ employment and their cumulative family size is stronger among whites than nonwhites and is strongest among women married less than 10 years, with 12 or more years of schooling, and who have no relatives living with them. Moreover, although there are many similarities in the pattern of the employment status/fertility relationship between the 1960 and 1970 data, the relationship is weaker in 1970 than in 1960.
The stable equivalent population, age composition, and Fisher’s reproductive value function
Authors: Espenshade Thomas J. , Campbell Gregory 
Published: March 2007

Abstract
This paper deals with a further analysis of the stable equivalent population for human populations. It first shows that the arithmetic difference between the size of the stable equivalent population and the actual population captures the total prospective contribution of age composition to the growth of the present population, if fertility and mortality rates are held constant at their current levels. The second part of the paper examines Fisher’s reproductive value function and investigates the location of maxima in relation to alternative values of the intrinsic growth rate. One conclusion which follows from this analysis is that, contrary to what has been discovered by others in specific examples, the reproductive value function can possess a global maximum in the first one or two years of life, provided the intrinsic rate of population growth is sufficiently negative. This principle is illustrated by reference to reproductive value functions calculated from the recent experience of U.S. females.
Methodological issues underlying multiple decrement life table analysis
Authors: Mode Charles J. , Avery Roger C. , Littman Gary S. , Potter Robert G. 
Published: March 2007

Abstract
In this paper, the actuarial method of multiple decrement life table analysis of censored, longitudinal data is examined. The discussion is organized in terms of the first segment of usage of an intrauterine device. Weaknesses of the actuarial approach are pointed out, and an alternative approach, based on the classical model of competing risks, is proposed. Finally, the actuarial and the alternative method of analyzing censored data are compared, using data from the Taichung Medical Study on Intrauterine Devices.
A new technique for measuring preferences in demographic studies
Authors: Frohardt-Lane Katharine A. , Landis J. Richard , Bruvold William H. 
Published: March 2007

Abstract
In this article, we introduce an alternative technique to the single-sentence question for measuring preferences for number of children, age at marriage, length of first birth interval, length of employment, and years of schooling. This new measurement procedure utilizes a graphic scale rather than verbal responses, and it places family size decisions within the context of several other major life cycle decisions. One month reliability data for the measurement technique were obtained from a sample of 107 school children. Reliability results are compared to data from a previous study of teenagers.
Economic Determinants of Family Size in West Africa
Authors: Snyder Donald W. 
Published: March 2007

Abstract
The economic theory of fertility postulates that income and prices, broadly defined, are important determinants of family size. What follows is an attempt to test this theory against the behavior of 717 predominantly urban households in Sierra Leone. Husband’s education is used as a proxy for income; the “price” of a child is accounted for by wife’s education and wife’s wage rate. Other important variables are wife’s age, a measure of child “quality,” wife’s age at first birth, and child mortality. The findings of the study tend to lend support to the economic theory of fertility but contain certain peculiarities which indicate a need for further research.
Age at Marriage, Family Planning Practices, and other Variables as Correlates of Fertility in Korea
Authors: Kim Mo-Im , Rider Rowland V. , Harper Paul A. , Yang Jae-Mo 
Published: March 2007

Abstract
The relationships between fertility and thirteen variables are examined in three groups of married Korean women, about 400 each from urban, rural, and semi-rural areas. Data were obtained by interview. Age at marriage and family planning practice are the strongest predictors of fertility and account for about 10 percent and 7 percent of the total variance, respectively. Other factors which accounted for lesser fractions of variability are ideal number of children, rural versus urban residence, education, aspiration for daughters, exposure to mass media, and economic status. Most of the relationships appear to be stable over time; others, which are associated with modernization, appear to be changing. The thirteen variables combined can account for a maximum of 40 percent of the variance in fertility.
Computer Display of Population Age Structure
Authors: Pick James B. 
Published: March 2007

Abstract
The standard human population pyramid contains only current information; it is often inadequate when making comparisons of different countries or years. A graphic computer program superimposes current population, life table survivor ships, stable population, and past population projected up to the present. Fertility, health conditions, migration, and demographic transition stage are better revealed by this expanded graph form. A time series of the modified pyramids reveals detailed age-specific trends for a country or region. With ’minor modifications the computer program is applicable to all machines with a Fortran IV compiler.
Generating Functions for Partial Sex Control Problems
Authors: Smith David P. 
Published: March 2007

Abstract
If at each conception couples have some control over the sex of their intended offspring, their chances of reaching a desired ultimate family composition will be influenced by the specific order in which they try for sons and daughters. This article introduces and discusses the mathematics of the strategy decisions that arise where probabilities remain constant at each birth. In the Appendix probabilities and their generating functions for distributions ofi children of one sex and 1–2 children of the other sex are given.
Effects of migration on the educational levels of the black resident population at the origin and destination, 1955–1960 and 1965–1970
Authors: Shin Eui-Hang 
Published: March 2007

Abstract
Using the 1960 and 1970 census data, this paper analyzes the net effects of the interregional migration of black males on the educational levels of the resident black male population at the regions of origin and destination. Significant variations are observed in the educational selectivity of outmigrants from each region, by region of destination. Comparing the educational levels of the return migrants to the South with those of the resident population in the nonsouthern regions provides no evidence that the return migrants are "failed" migrants. The net effect of interregional migration on the educational levels of the black male resident population at the regions of origin and destination is insignificant in most age groups, for both the 1955–1960 and 1965–1970 periods. In particular, in-migration from the South to nonsouthern regions has little effect on the educational levels of the resident population in most age groups. In fact, for nonsouthern regions, out-migration is more detrimental to the educational level of the resident black male population than is in-migration from the South. Furthermore, the net effect of interregional migration has declined from the 1955–1960 period to the 1965–1970 period.
Husband-wife agreement about reproductive goals
Authors: Coombs Lolagene C. , Fernandez Dorothy 
Published: March 2007

Abstract
Data from Malaysia on the reproductive goals of husbands and wives are analyzed to determine level of agreement, using new scale measures on preferences for number and sex of children as well as the conventional measure of desired number of children. The level of agreement between husband and wife varies considerably depending on the focus of analysis and the measure of agreement used. Overall aggregate agreement of men and women is high but lower for subgroups of the population, particularly among various ethnic groups. For marital partners, the agreement is much lower, especially on sex preferences. The level observed depends on whether the measure is identity of responses or an index of homogeneity which allows for couple concordance based on chance or common socialization factors. The views about the reproductive goals of one marital partner cannot with confidence be assumed to represent the views of the other.
Age and marital status at first birth and the pace of subsequent fertility
Authors: Bumpass Larry L. , Rindfuss Ronald R. , Janosik Richard B. 
Published: March 2007

Abstract
Taking care to minimize the truncation bias inherent in cross-sectional data and controlling for other variables, this paper demonstrates the strong effects of both age and marital status at first birth on the pace of subsequent fertility. These effects are particularly strong in the interval immediately following the first birth but persist even into the fourth interval. Important differences are found with respect to the experience of rapid fertility, rather than in the mean lengths of intervals. These results add to the growing attention to the social dimensions of age as a variable in fertility processes.
A general method of decomposing a difference between two rates into several components
Authors: Gupta Prithwis Das 
Published: March 2007

Abstract
In her work on the components of a difference between two rates, Kitagawa (1955) was successful in dividing the difference into the rate effect and the effect of the factor, for data classified by one factor. Her formulation for data classified by two factors, however, involves an interaction term which is difficult to interpret. Retherford and Cho (1973) devised a method that does not include any interaction terms. However, their method has other limitations, such as the dependence of the results on the order in which the effects of the factors are computed. In this paper, we provide a general method capable of handling any number of factors, which is developed along the lines suggested by Kitagawa and by Retherford and Cho but without the limitations of their methods.
A components method for measuring the impact of a family planning program on birth rates
Authors: Teachman Jay D. , Hogan Dennis P. , Bogue Donald J. 
Published: March 2007

Abstract
One of the major goals of family planning programs worldwide has been to reduce the level of fertility in hopes of slowing the rate of natural increase and promoting social and economic development. Such programs have now been in existence for sufficient lengths of time to have had an impact on fertility levels. In several countries with organized family planning programs, marked declines in fertility levels have been observed. The extent to which such declines may be credited to organized programs has not been rigorously measured because an appropriate research methodology has been lacking. This paper describes one method of directly linking declines in fertility levels to the contraceptive protection experienced by a population. The contribution of organized family planning programs is estimated by decomposing the amount of total contraceptive protection into within-program and outside-program sources.
The momentum of population growth with time dependent net maternity function
Authors: Cerone P. , Keane A. 
Published: March 2007

Abstract
The momentum of population growth problem of Keyfitz is generalized to contain a gradual change of the age-specific birth rate to the level of bare replacement. Assuming a time dependence for the net maternity function of the form , R being the net reproductive rate, we show that for the Malthusian model the asymptotic birth rate is increased by exp (r/λ), where r is the rate of increase of the population before t = 0. A numerical method for obtaining the asymptotic birth rate for a general net maternity function with the same time dependence is outlined.
Changing patterns of migration between metropolitan and nonmetropolitan areas in the United States: Recent evidence
Authors: Tucker C. Jack 
Published: March 2007

Abstract
Data from the 1975 Current Population Survey confirm that, during 1970–1975, there was a reversal of the traditional net migration stream between metropolitan and nonmetropolitan areas in the United States. During this period, there was net in-migration of 1,600,000 persons to nonmetropolitan areas, in contrast to net out-migration of 350,000 persons from these areas in 1965–1970. Reversal was caused by a 12 percent decrease in the number of nonmetropolitan out-migrants and a 23 percent increase in the number of SMSA residents moving to nonmetropolitan territory over 1965–1970 levels. While some changes in the size of migration streams were due to changes in age structures and population bases in metropolitan and nonmetropolitan areas, they were caused primarily by real shifts in outmigration propensities at practically all ages in both areas.
The effect of subsidized family planning services on reproductive behavior in the United States, 1969–1974
Authors: Udry J. Richard , Bauman Karl E. , Morris Naomi M. 
Published: March 2007

Abstract
This paper evaluates the impact of federally subsidized family planning programs in the United States, from 1969 to 1974, on the reproductive behavior of ever-married women, 15–44 years old. The study began with an experimental design and the random assigment of areas to treatment and control but was completed as a multivariate analysis, treating program input as an interval-scaled independent variable. Using “before” and “after” area sample surveys and patient service data from operating programs, the demographic impact of the program was estimated. The impact detected was nonsignificant; according to our analysis, overall use of physician-administered contraception was not affected by the subsidized programs. The only program-induced change of activity related to reproduction that we recorded was increased use of subsidized services in study areas with high program input and increased use of private physician services where program input was low. These findings need to be interpreted with the caution usually exercised in evaluating imperfect field experiments.
Motivations for the use of birth control: Evidence from West Africa
Authors: Ware Helen 
Published: March 2007

Abstract
A conventional assumption in the family planning literature is that birth control in developing countries is first adopted by high parity women who wish to cease childbearing. The empirical support for this belief has mainly been drawn from interview surveys on the motivations for, and the timing of, the inception of birth control among married women in areas where there is no cultural precedent for birth spacing by traditional means. This study, on the other hand, is based on data drawn from an area sample of 6,606 women, married or single, aged 15–59, in Ibadan, Nigeria, where there is a tradition for the practice of abstinence after a birth for the purpose of birth spacing. The Nigerian pattern revealed in the data presented here is indeed distinctive in many respects: (a) although premarital sex is prevalent, levels of premarital contraception are high; and (b) within marriage, spacing is the most prominent motivation for contraceptive practice, more important than the limitation of family size.
Life table techniques for multiple-cause mortality
Authors: Manton Kenneth G. , Tolley H. Dennis , Poss Sharon Sandomirsky 
Published: March 2007

Abstract
A lethal defect-wear model of mortality is presented which rationalizes the assumption of independent risks when death may be due to more than a single condition, Under this model, it is shown how competing risk theory and standard categorical data methods may be merged in a unified approach to the analysis of multiple-cause mortality data. The methodology is used to analyze linkages among diseases in the mortality data and evaluate the implication of the elimination of patterns of morbid states for multiple-cause mortality data from deaths occurring in 1969 in North Carolina.
An investigation of the age of an alleged centenarian
Authors: Myers Robert J. 
Published: March 2007

Abstract
At times, persons have been reported as living to extremely advanced ages such as 130, or even higher (McWhirter and McWhirter, 1977, p. 26; Medvedev, 1974; Merrill, 1976). However, controlled studies of closed groups like Civil War veterans (Myers and Shudde, 1955) have not shown any persons surviving beyond age 110, when age has been reasonably verified. It seems, therefore, highly plausible that reports of extremely advanced ages at death reflect exaggerations of age rather than reality. This note reports a case history which supports this view and illustrates how ages can be verified using available census data.
Urbanization and de-urbanization of the black population before the civil war
Authors: Wilkie Jane Riblett 
Published: March 2007

Abstract
Pre-Civil War black urbanization is examined using data from federal census records, 1790 to 1860. The black population is found to be as urban as the white population initially, but its urbanization underwent relative decline in the last two decades before the Civil War. Foreshadowing current patterns, the northern black population was heavily concentrated in the largest cities, and the free black population was the most urban of all groups. The timing of black urban decline in the North, as well as regional and size of place differences in that decline, suggest that both competition with immigrants in major eastern seaboard cities and the passage of the Fugitive Slave Law in 1850 contributed to black de-urbanization. For the South, the explanations of black urban decline proposed by Wade, Conrad and Meyer, Goldin, and Bonacich are evaluated, and Bonacich’s split labor market theory is judged to be most consistent with the demographic trends.
Compensating changes in fertility and mortality
Authors: Espenshade Thomas J. , Chan C. Y. 
Published: March 2007

Abstract
This paper illustrates a method of studying changes in vital rate schedules which have no effect on the intrinsic rate of population growth. These changes are described as compensating changes in fertility and mortality. The analysis proceeds from the discrete perspective of Leslie matrices, wherein the central idea is to establish the set of all compensating changes by identifying that class of Leslie matrices which possess the same positive eigenvalue, λ1. A root-squaring technique is adapted for the purpose of estimating λ1. Finally, a variety of compensating fertility and mortality changes is illustrated using data from Japan.
A study on IUD retention by curve-fitting
Authors: Liu Peng-Tu , Chow Lien-Ping , Abbey Helen 
Published: March 2007

Abstract
In order to estimate the demographic impact of IUD, there is a need for estimating IUD retention rates beyond the period of actual observation. This article describes a mixed exponential function for this purpose. With this function of IUD retention, it is possible to estimate the “life expectancy” and “half-life” of an IUD. Another important concept is the “cut-off date”, introduced in estimating the “life expectancy” because in practice no IUD will be worn by a woman forever.
Gradients of metropolitan dominance in turkey: Alternative models
Authors: Treadway Roy C. 
Published: March 2007

Abstract
The dominance or influence of metropolitan centers in the developing country of Turkey, as measured by gradients of population characteristics (population density, percent urban, sex ratio, percent over five years of age, and percent literate) by distance from the nearest metropolitan center for 1960 and 1965, is found to decrease sharply from the central zone to the next zone (25–49 kilometers from the center), and then change very little with increasing distance from the center, for both urban and rural populations. None of several alternative mathematical models describes the form of the influence of metropolitan centers on the population characteristics of their hinterlands very well, but the best fitting models suggest that population density declines by distance according to an exponential function to the base e, percent urban declines according to a function to the one-fourth power, sex ratio declines for about 100 kilometers and then increases according to a quadratic function, and percent under six years increases and percent literate declines according to a linear function. These results suggest that dominance of a metropolitan center over its hinterland beyond 25 or 50 kilometers in Turkey is not very strong, possibly because of the relatively poorly developed transportation and communication systems. Although metropolitan dominance in Turkey in 1960 and 1965 seems to diminish more sharply with distance and to extend less far from the metropolitan center than in developed countries or than it may as Turkey develops economically and technologically in the future, additional comparative data over time in Turkey and in developed countries at the same time are needed for a rigorous test of this apparent finding.