1-10 of 10 Search Results for

Ternity Function

Sort by
Journal Article
Demography (1978) 15 (1): 135–137.
Published: 01 February 1978
... any net maternity function to another and, thus, includes all previous models. 27 1 2011 © Population Association of America 1978 1978 Fertility Decline Renewal Equation Time Dependent Transition Asymptotic Birth Rate Ternity Function References Cerone , P...
Journal Article
Demography (1972) 9 (2): 309–320.
Published: 01 May 1972
... progression ratios K,. and mean child spacing times D + T,. are similar to those presented in some earlier studies (Grabill, 1958). Figures 4 and 5 show that the net ma- ternity function simulated with these parameters fits the actual data remark- ably well. (To make comparison pos- sible, the sum...
Journal Article
Demography (1973) 10 (4): 567–570.
Published: 01 November 1973
... 2 6 ~) in which the coefficients p., u2, and k3 are, respectively, the first, second, and third central moments of the net ma- ternity function. Equation (3) is de- veloped by taking logarithms on both sides of (1) and expanding the left-hand side of the equation as a Taylor series. Terms beyond...
Journal Article
Demography (1974) 11 (4): 563–585.
Published: 01 November 1974
... subject to constant age-specific rates. Let Be denote the number of births at time t; Pa the proportion of births surviving to age a; and ma the number of births per surviving member of the population of age a in the appropriate time interval. The product maPa is called the "net ma- ternity function," epa...
Journal Article
Demography (1976) 13 (4): 513–519.
Published: 01 November 1976
... ma- ternity function. While comparing the in- dex values with those presented by Keyfitz (197 I, Table 3), it was found that the lat- ter two parameters were not presented by him since he did not need them. However, the average age of net maternity can be approximately obtained for small values...
Journal Article
Demography (1983) 20 (1): 79–86.
Published: 01 February 1983
.... The Momentum of Population Growth with Time Dependent Net Maternity Function. Demography 15:131-134. 1978b. The Stable Births Resulting from a Time Dependent Change Between Two Net Ma- ternity Functions. Demography 15:135-137. Coale, A. J. 1973.Atlernative Paths to a Stationary Population. Pp. 589-603...
Journal Article
Demography (1979) 16 (4): 575–601.
Published: 01 November 1979
... but not mutually exclu- sive development argues that the net ma- ternity function, <PJ> varies over time so that either, from (13), b, = <Potbt-, + <p ltbt - 2 + '" + <pNtbt - N - 1 (15) or, from (14), b, = <Potbt-, + Q> ltbt - 2 + '" + ¢lNtbt-N-1 + u.. (16) If the ¢llt are unrestricted numbers...
Journal Article
Demography (1981) 18 (4): 695–713.
Published: 01 November 1981
... developed by Becker and Lewis (1973) and Willis (1973) provide a fruitful theoretical framework to generate multivariate health outcome functions and to assess the roles of social programs and policies in these functions. Ben-Porath (1973), Ben-Porath and Welch (1976), Williams (1976),andLewit (1977) have...
Journal Article
Demography (1989) 26 (1): 15–35.
Published: 01 February 1989
... that account for the nonindependence of observations in the model alleviates the bias. We use several maternal variables (education, demographic status) that plausibly serve this function. 8 All explanatory variables are entered as categorical, with indicator variables generated for each category and scored 1...
Journal Article
Demography (2009) 46 (2): 341–369.
Published: 01 May 2009
... history data at an even greater level of detail. Motherhood, Labor Force Behavior, and Women s Careers 349 study), however, our substantive inferences are unaffected by functional form consider- ations, and we hence report the more parsimonious speci cations here. Also, because data quality...