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Proportional Reduction

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Published: 23 April 2014
Fig. 2 The age-specific sensitivities to proportional mortality reduction in Sweden for 1950 (solid lines) and 2011 (dashed lines) of (a) the variance of age at death after 15 years and (b) the mean age at death (i.e. life expectancy, after this age). The vertical lines show the mean age More
Journal Article
Demography (1967) 4 (2): 569–575.
Published: 01 June 1967
... of time of use; and (3) pregnancy reduction has been declining since 1964. 24 1 2011 © Population Association of America 1967 1967 Family Planning Pregnancy Rate Proportional Reduction Crude Birth Rate Total Pregnancy References 2 Berelson , Bernard ( 1964...
Journal Article
Demography (1970) 7 (2): 121–134.
Published: 01 May 1970
... 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...
Journal Article
Demography (1997) 34 (3): 421–427.
Published: 01 August 1997
...Young J. Kim; Robert Schoen Abstract Population momentum and population aging occur when an initially growing population experiences a reduction in fertility to replacement level. Conceptually and empirically, momentum and aging express the same change, albeit on different scales. Fundamentally...
Journal Article
Demography (1967) 4 (1): 363–373.
Published: 01 March 1967
..., for the degree of industrialization in urbanareas is rarely taken into account. Two hypotheses are tested based upon Mexican census and vital registration data for 1940–60: (a) urban fertility is inversely related to the proportion of the urban population employed in the secondary sector of the economy and (b...
Journal Article
Demography (1968) 5 (1): 268–305.
Published: 01 March 1968
...' working against limiting factors. The positive factors comprise (1) a term proportional to the population size, p , for that particular year, and (2) a term equal to the immigrant population, p m′ , for the same year. The limiting factors are all proportional to the square of the present population size...
Journal Article
Demography (1975) 12 (2): 209–222.
Published: 01 May 1975
...Samuel H. Preston; Alan Thomas Richards Abstract Several authors have argued that increased work opportunities for women have helped to produce a reduction in the average age at marriage in the United States. This paper tests this proposition on data for the 100 largest SMSA’s in 1960. Using...
Journal Article
Demography (1968) 5 (1): 525–538.
Published: 01 March 1968
... mortality reductions have been reported, according to reports from the National Center for Health Statistics, the proportion of the population that claims one or more chronic conditions has been rising since 1957. This could reflect an aging of the population, a rise in the de- tection of such conditions...
Journal Article
Demography (1995) 32 (3): 379–405.
Published: 01 August 1995
... Washington, DC 20036 This paper uses new methods to determine the sources of the sharp fall and then the steep rise in personal income inequality between 1959 and 1989. The increase in the proportion of single-head families tended to boost inequality over the entire period. Forty percent of the reduction...
Journal Article
Demography (1971) 8 (3): 353–367.
Published: 01 August 1971
... of involvement in this type of non-familial role, the work index or proportion of one’s married life engaged in the labor force is developed. The work index is found to be a particularly sensitive measure of involvement in the worker role vis-a-vis their fertility. The working hypothesis of this study...
Journal Article
Demography (1970) 7 (2): 241–253.
Published: 01 May 1970
... and changes in the social status of women which included a sharp reduction in the proportion married in the age group 15–19. 26 1 2011 © Population Association of America 1970 1970 Family Planning Family Planning Program Average Annual Growth Rate Crude Birth Rate Tunisian Population...
Journal Article
Demography (1968) 5 (1): 318–353.
Published: 01 March 1968
... for substantial proportions of all deaths and which also have large differentials by edu- cation point to the fields of greatest po- tential for overall mortality reduction. A rough indication of the relative contribu- tion of selected causes of death to reduc- tions that are possible from social and economic...
Journal Article
Demography 11315685.
Published: 24 May 2024
... models of childbearing and partnership for the 1970–1979 birth cohorts in Italy, Great Britain, Sweden, and Norway, we implement fictive scenarios that reduce the risk of having a first child before age 30 and examine fertility recovery mechanisms for aggregate fertility indicators (the proportion...
Includes: Supplementary data
Journal Article
Demography (1987) 24 (4): 615–622.
Published: 01 November 1987
... human life span (Fries, 1980), the effect of a proportional reduction of death rates on longevity diminishes. Thus in the case of the male regional life table model West (Coale and Demeny, 1967), His 1.25 at levell, but it is only 0.21 at level 21. The definition of H in equation (1) may be converted...
Journal Article
Demography (1986) 23 (2): 275–282.
Published: 01 May 1986
...) and from that applied to general probability density functions (see, for example, Theil 1972). Equation (7) tells us that for a small proportional reduction 8 in the death rate at all ages, the proportional increase in life expectancy can be simply approximated as H times 8. The value of H depends directly...
Journal Article
Demography (1975) 12 (1): 157–161.
Published: 01 February 1975
... 15, gamma = 0.53; for Q 14 versus Q 33, gamma = 0.64; for Q 15 versus Q 33, gamma = '0.46. Since gamma is a proportional-reduction-in- error measure, these statistics indicate that about fifty percent of the variation in anyone indicator is associated with variation in any other single indicator...
Journal Article
Demography (1999) 36 (4): 475–495.
Published: 01 November 1999
... can be attributed to declining risks of death across a broad age range (from birth to age 75), although the greater proportional reduction in mortality rates at younger ages (especially below age 5) has had a predominant influence. The historical reduction in the life table IQR occurred mostly during...
Journal Article
Demography (1984) 21 (3): 297–307.
Published: 01 August 1984
... 0.2 , , , , , , , , , , ' . 60 655040302010 0LJ. -1- L- J. o DURATION OF MARRIAGE Figure 3.-Proportion of Marriages Intact by Successive Durations, for Single Decrements of Divorce and of Mortality, Colombia (1972-1976). the ifi) values are almost identical: a I percent reduction in either widowhood...
Journal Article
Demography (1992) 29 (3): 333–341.
Published: 01 August 1992
...Ansley J. Coale Abstract It is widely known that modem economic development has been accompanied by the initiation and spread of effective limitation of fertility, and that generally the populations which experienced development at a late date also had a belated reduction in childbearing. Here...
Journal Article
Demography (2003) 40 (3): 543–568.
Published: 01 August 2003
... as a special case of measuring association in general. In the literature on measuring association in contingency tables, there are several different approaches. The more famil- iar of these strategies are various techniques using the logic of proportional reduction of error, analogies to the correlation...