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Beta Distribution

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Journal Article
Demography (1975) 12 (2): 291–301.
Published: 01 May 1975
... that fecundability among women varies according to a Beta distribution (with parameters a and b ), the distribution of conception times in a truncated population can be considered as truncated Type I geometric. This paper presents an algorithm to obtain the moment and maximum likelihood estimates of a and b from...
Journal Article
Demography (1978) 15 (1): 87–98.
Published: 01 February 1978
...John C. Barrett Abstract The effect of various factors on selection for family planning status and for natural fecund ability is studied in a simulation that incorporates a beta distribution of fecundability among women. The mean fecundabilities of current spacers, current limiters, current...
Journal Article
Demography (1971) 8 (4): 481–490.
Published: 01 November 1971
... (General Re- port, Table 165K) for marriages of 30- 35 years duration, wives aged 20-25 at marriage. Each woman's fecundability is determined at marriage. The beta distribution of random num- bers was obtained by selecting the ath number in magnitude of a + b - 1 uni- formly distributed numbers...
Journal Article
Demography (1982) 19 (3): 291–299.
Published: 01 August 1982
... are subsequent mixing distributions of a standard parametric form (a situation not achieved, for exam- ple, by the adoption of a Beta mixing distribution), but they remain of the SB form. Moreover, one parameter, Do, re- mains invariant from time period to time period, while the second parameter may be simply...
Journal Article
Demography (2018) 55 (4): 1363–1388.
Published: 05 July 2018
... f π π d π . In our specific example, with likelihood R ∼ Poisson ( N μπ), prior π ∼ Beta (12, 3), and data ( R , N ) = (10, 1,000), this distribution is 5 P μ R = 10 N = 1,000 ∝ ∫ 0 1 e – 1000 μπ μπ 10 π 11 1 − π 2 d π...
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Journal Article
Demography (1984) 21 (4): 519–536.
Published: 01 November 1984
... that follows a beta distribution with parameters sand q: 1 f(P) = B(s,q) . p S - 1(1 - p)q-l 0 :s; P :s; 1 where B(s ,q) is the constant that forces the integral off (P) to sum to 1.8 In this variant of the model, the ex- 526 DEMOGRAPHY, volume 21, number 4, November 1984 Table I.-Effect of Education...
Journal Article
Demography (1989) 26 (2): 185–201.
Published: 01 May 1989
... a uniform distribution (over a specified age interval) or the Coale-McNeil (1972) model. Age at sterility is then selected in one of three ways: from a distribution that is exponential, quadratic, or linear. Fecundity may be constant among all women or randomly drawn (at birth) from a beta distribution...
Journal Article
Demography (1975) 12 (4): 645–660.
Published: 01 November 1975
... + c4fz(1 - f22, for z = 2, 3, (11) The distribution F Un) is assumed to be a modified Beta distribution, which is completely determined if the mean and variance of fecundability 1 are known (see the first section of the Appendix for details). 650 DEMOGRAPHY, volume 12, number 4, November 1975 CALCULATION...
Journal Article
Demography (1999) 36 (4): 505–519.
Published: 01 November 1999
... absolute bias for which mean squared error is lower than when T = I. 510 DEMOGRAPHY, VOLUME 36-NUMBER 4, NOVEMBER 1999 'Symmetric beta distributions l3(s,s) over [0,2where is the population mean = .20 in this example). FIGURE 2. EXPERIMENTAL DISTRIBUTIONS· OF FERTILITY RATES T. Remember that the example...
Journal Article
Demography (2017) 54 (2): 603–630.
Published: 13 March 2017
... regression with beta-distributed dependent variables . Psychological Methods , 11 , 54 – 71 . Sumption , M. ( 2013 ). The elusive idea of labor-market “shortages” and the U.S. approach to employment-based immigration policy . In M. Fix , D. G. Papademetriou , & M. Sumption...
FIGURES
Journal Article
Demography (1974) 11 (3): 361–375.
Published: 01 August 1974
... at marriage. 8 2 2011 © Population Association of America 1974 1974 Divorce Rate Beta Weight Median Family Income Marital Instability Percent Female References Broel-Plateris Alexander ( 1961 ). Marriage Disruption and Divorce Law . Chicago : University of Chicago...
Journal Article
Demography (1981) 18 (2): 231–244.
Published: 01 May 1981
.... These three functions give much better fits than the beta density and the two Brass procedures. Brass never seems to have suggested that his procedures would give more than a "fair description of ob- served distributions" (Brass, 1978, p. 8), which they do in our case as well, so this part of our conclusion...
Journal Article
Demography (2012) 49 (2): 393–424.
Published: 25 January 2012
... regression analysis on migration and mental health ( N   =  709) Mental Health Outcomes Never-Leavers Beta (SE) Returnees Beta (SE) Immigrants Beta (SE) R 2 VT: Vitality, Energy, and Fatigue  Model 1: Never-leavers as reference 0.75 –3.55* .07   group (1.62) (1.73)  Model 2...
FIGURES
Journal Article
Demography (2023) 60 (1): 303–325.
Published: 01 February 2023
... ), or a few time points ( Kibele et al. 2015 ; Rau and Schmertmann 2020a ). Second, although these authors' conclusions about mortality convergence were based on comparing life expectancies and mortality rates, they did not use formal convergence measures or approaches, such as beta, sigma, or delta...
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Includes: Supplementary data
Journal Article
Demography (1985) 22 (1): 35–59.
Published: 01 February 1985
... Korea Taiwan Sri Lan1<a Sinhalese S.L. Tamil Indian Tamil Moor Indonesia Indonesian Javanese Sundanese Madurese Balinese Malaysia Malay Chinese Indian (eta/beta) Cohort rno:I929 1930-1934 1935-1939 1940-1945 (eta/beta) 1.2 2.3 1.5 -0.3 -1. 2 -1. 5 -1. 2 -2.6 -3.7 -3.8 0.8 -1. 8 2.4 -0.7 (.47) * -0.9...
Journal Article
Demography (2020) 57 (1): 221–241.
Published: 28 January 2020
... , ... , 45 . We use standard demographic calculations to convert these log mortality rates into the L a values in Eq. ( 2 ). To account for possible errors in estimated mortality, we use a beta distribution for the true value of q 5 . Our prior is q 5 ~ Beta( a, b ) with a and b...
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Includes: Supplementary data
Journal Article
Demography (1975) 12 (3): 505–518.
Published: 01 August 1975
..., and therefore the relation- ship between the dependent and inde- pendent variables may take any form. Multiple Classification Analysis is par- ticularly suited to the theoretical prob- lem posed, for it yields a measure, beta, which indicates the statistical importance of an independent variable in the pre...
Journal Article
Demography (1976) 13 (2): 175–187.
Published: 01 May 1976
... the relative magnitude of the betas for the different categories of the three hypoth- esized interacting variables. This method was selected as the most appropriate given the high intercorrelations among the vari- ables of interest. Thus we ran separate regressions for the different birth-order...
Journal Article
Demography (1997) 34 (3): 369–383.
Published: 01 August 1997
... of the proportion of M users in the contracepting population has a beta distribution depending only on the initial number of contraceptive users, Yo, and the initial proportion ofM users, Xo (Feller 1971). Because the urn function qn(x) does not depend on the network size K, this beta distribution is also achieved...
Journal Article
Demography (1974) 11 (4): 641–656.
Published: 01 November 1974
.... The relative importance of the inde- pendent variables, including age at mar- riage and contraception, is studied by use of Eta and Beta values. The corre- lation ratio Eta is based on the raw means of the MeA and gives the ca- pacity of the independent variable (sometimes called predictor or potential...