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Journal Article
The end of rapid increase in the use of oral anovulants? Some problems in the interpretation of time series of oral use among married women
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Demography (1970) 7 (1): 31–41.
Published: 01 February 1970
..., and current and prospective oral use, shows that under present circumstances the maximum oral use rate will be considerably less than unity. 26 1 2011 © Population Association of America 1970 1970 Married Woman Terminal Point Oral Contraception Marriage Cohort Duration Distribution...
View articletitled, The end of rapid increase in the use of oral anovulants? Some problems in the interpretation of time series of oral use among married women
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for article titled, The end of rapid increase in the use of oral anovulants? Some problems in the interpretation of time series of oral use among married women
Journal Article
Concept, measurement, and data in migration analysis
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Demography (1967) 4 (1): 253–261.
Published: 01 March 1967
... that moves originate and terminate as a random population variable. Some difficulties with this particular model are pointed out and the author suggests that other analytical approaches to migration data be sought and in this connection refers to the literature on the mathematical theory of epidemics...
Journal Article
The continuation of education after marriage among women in the United States: 1970
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Demography (1976) 13 (2): 161–174.
Published: 01 May 1976
... graduates at marriage have reached a terminal point in their educa- tional careers. Further education implies a commitment of considerable cost and time, whereas women with one to three years of high school at marriage have only to complete an educational course already underway. In short, there is probably...
Journal Article
A study on IUD retention by curve-fitting
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Demography (1972) 9 (1): 1–11.
Published: 01 February 1972
... in different countries, seems to be a decreasing function of time, rather than a constant. This is to say that the probability of terminating an IUD is greater at time t than at a later point in time, t + 1. This decreasing function, however, gradually approaches a con- stant. Several decreasing functions have...
Journal Article
A stochastic approach to the estimation of the prevalence of IUD: Example of Taiwan, Republic of China
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Demography (1971) 8 (3): 341–352.
Published: 01 August 1971
... acceptors and monthly termination rates are available. Based on the actual monthly insertions in Taiwan from January, 1965 to December, 1969 and on the monthly termination rates ob- served in the Taichung medical follow- up studies, IUDs "currently in situ" at specified points of time have been calcu- lated...
Journal Article
The Impact of Family Planning on Fertility in a Rural Area of East Pakistan
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Demography (1967) 4 (2): 569–575.
Published: 01 June 1967
... in pregnancy reduction. An additional point concerning the ter- mination rates and the proportional re- duction in pregnancy of 1965 and 1966 must be made. Included in the termina- tion rates for these two years are adopters who "shifted" to the IUCD. If the shifters are not included as adopters terminating...
Journal Article
Pregnancy Termination Intervals in a Rural Area of Bangladesh
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Demography (1974) 11 (2): 207–214.
Published: 01 May 1974
... year of life of the child. The esti- mate also compares favorably with the results from other studies on the subcon- tinent. For example, Potter (1965) found in the Khanna study an average of about Pregnancy Termination Intervals Potter (1963, p. 158) has pointed out, is rather moderate since only...
Journal Article
Distributions of Postpartum Amenorrhea: Some New Evidence
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Demography (1987) 24 (3): 413–430.
Published: 01 August 1987
... a number of samples. These revealed a large amount of bimodality and heaping on multiples of six months. To cope with this, they developed a model based on the logit transformation. Their procedure is as follows: 1. Administer a three-point average to attenuate peaks. Postpartum Amenorrhea 415 2. Convert...
Journal Article
A Research Note on Unconditional Cash Transfers and Fertility in the United States: New Causal Evidence
Open Access
Demography (2025) 62 (2): 405–417.
Published: 01 April 2025
... at least one of the two-year and three-year surveys, a sample size that gives us 80% power to detect differences of 7.5–8.5 percentage points in pregnancies and births between the two groups at p < .05 with a two-tailed test. At the time of enrollment in the study (coinciding with the birth...
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for article titled, A Research Note on Unconditional Cash Transfers and Fertility in the United States: New Causal Evidence
Includes: Supplementary data
Journal Article
Target Fertility, Contraception, And Aggregate Rates: Toward A Formal Synthesis
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Demography (1977) 14 (4): 455–479.
Published: 01 November 1977
..., tending to reduce unwanted The slope of the relation should' be m* / a, fertility still further. and it should pass through the origin. In These and other effects can be assessed fact, the points in Figure 5 do lie closer to through a dynamic analysis of the pr~sent a straight line than do those in Figure...
Journal Article
A method for comparative analysis of fertility dynamics represented by sequences of fertility schedules
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Demography (1970) 7 (2): 155–167.
Published: 01 May 1970
..., c/J(n, j) = the ratio of the number of females in the j-th age group to those in the first age group at the point in time in reference, s(j) = the female survival rate from the j-th to the (j + l)th age group, all age groups and successive periodsfin time being defined using constant width, say, w...
Journal Article
Cohabitation and marriage in the 1980s
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Demography (1988) 25 (4): 497–508.
Published: 01 November 1988
... transition rates and cumulative experience to a focus on marital and cohabitation statuses at particular points in the life course and shows the proportion of men and women currently married or currently cohabiting. The data in Figure 6 reflect exits into and out of both cohabitation and marriage. For a few...
Journal Article
A model of fertility by planning status
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Demography (1978) 15 (4): 433–458.
Published: 01 November 1978
... with respect to termination exposure (and unintended births). As ex- plained subsequently, we have restricted the coverage of our data to experience within the first 15 to 20 years of marriage; one reason for so doing is to reduce the lengths of open interval included in the measurements. To this point, we...
Journal Article
Practical and mathematical considerations in the formulation and selection of migration rates
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Demography (1965) 2 (1): 429–443.
Published: 01 March 1965
... calculated on initial, mean, or terminal populations are all perfectly, but not linearly, correlated with each other. That is, and in which the subscripts of R identify rates computed on the bases of initial (i), ter- minal (t), and mean (m) populations. The implication of this last point is simply...
Journal Article
A Time Series of Instrumental Fertility Variables
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Demography (1981) 18 (4): 487–509.
Published: 01 November 1981
...- der, 1977b). Other differences with the previous work, derivative principally from the availability of new kinds of information in the 1975 questionnaire, are specified at appropriate points in the text. The present work has two obvious advantages over its predecessor. First, restriction of the sample...
Journal Article
A vital statistics-based procedure for estimating conception rates
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Demography (1977) 14 (2): 223–238.
Published: 01 May 1977
... to this point, been assigned 13cycles of marital exposure for the year in which a pregnancy termination was observed. The assignment of 13 cycles is inaccurate to the extent that there is premarital ex- posure which results in premarital concep- tion and marital pregnancy terminations. This effect is most...
Journal Article
Repeat abortion
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Demography (1976) 13 (1): 65–82.
Published: 01 February 1976
... the sequencing of events within the month are made and indicated at appropriate points in the description below. Assume a calendar period of observa- tion of T months. The number of initial abortions during the ith month of this period is n(i), i = 1,2, , T. The first month of any exposure period is a month...
Journal Article
Statistical evaluation of contraceptive methods: Use-effectiveness and extended use-effectiveness
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Demography (1968) 5 (2): 931–940.
Published: 01 June 1968
... have tried to follow patients or clients beyond the point at which the prescribed method was abandoned.s Although extended use- effectiveness has in fact been evaluated in a few studies based on interviews with samples of the general population," no 8 Beebe, op. cii., pp. 124-37; C. Chandrasekar...
Journal Article
Depends Who's Asking: Interviewer Effects in Demographic and Health Surveys Abortion Data
Open Access
Demography (2021) 58 (1): 31–50.
Published: 01 February 2021
.... Given widespread lack of trust in DHS abortion data, should abortion questions be excluded from interviewer-led household sample surveys, such as the DHS? Or should greater efforts be made to recruit and train interviewers? Our analyses cannot answer all these questions, but they point to the need...
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for article titled, Depends Who's Asking: Interviewer Effects in Demographic and Health Surveys Abortion Data
Includes: Supplementary data
Journal Article
Birth-interval dynamics in rural Bangladesh and maternal weight
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Demography (1989) 26 (3): 425–437.
Published: 01 August 1989
... included because of marriage but who had not yet reached menarche. New migrants were added as well as those who married at any time during the study. A total of 2,445 women were included in the study at some point between October 1975 and January 1980. At the initial interview with each woman, information...
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