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Flow Equation

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Journal Article
Demography (1977) 14 (4): 591–592.
Published: 01 November 1977
.... In general, however, the greater power of the matrix formulation and its more explicit recognition of both age and region give it substantial advantages over the scalar model. 16 1 2011 © Population Association of America 1977 1977 Life Table Scalar Model Flow Equation Substantial...
Journal Article
Demography (1975) 12 (2): 313–324.
Published: 01 May 1975
... by three sets of equations. The first set consists of the flow equa- tions which relate the number alive in a table at age z + n to the number alive at age x and the increments and decre- ments to the table between x and x + n. For table a, then l% number living at exact age x; "d% number of decrements...
Journal Article
Demography (2020) 57 (2): 779–797.
Published: 24 March 2020
... 21 2 / n 2 m 12 m 21 m 12 = d 12 / n / 2 x 11 + x 10 m 21 = d 21 / n / 2 x 21 + x 20 , where the first two equations in (21) are flow equations specifying the possible interstate...
Includes: Supplementary data
Journal Article
Demography (1994) 31 (1): 159–175.
Published: 01 February 1994
... interval x to x + n, and is calculated according to Equation (6). This term is analogous to the midyear population of persons who are in health status i. The net flow equations that give rise to the person-year values, and hence to the health status prevalence rates, are and lJx +n) = lj(x) + doj(x,n...
Journal Article
Demography (1972) 9 (2): 263–274.
Published: 01 May 1972
.... In addition, esti- mates for equation E suggest that one- half of the total stock of migrants to the United Kingdom generated by a given earnings differential enter the current stock of migrants in any year. So in terms of both stocks and flows Irish migration appears to have become more rapidly responsive...
Journal Article
Demography (1980) 17 (3): 297–322.
Published: 01 August 1980
... of either the recursive equation of Hoem and Fong (1976) or the matrix expression of Willekens (1979). For a conventional table, the lack of a full de- scription of the flows among the labor force statuses necessitates an approximate calculation. The denominator of the ratio for the labor force based...
Journal Article
Demography (1970) 7 (3): 361–368.
Published: 01 August 1970
... population distribution. Zero growth leads to an acceptable result when it is combined with amigration regulator. The information-flow/logistic-growth model expressed in equations (15) and (16) may produce acceptable results pro- vided the limit on natural increase is strong enough. However, the solution...
Journal Article
Demography (1975) 12 (1): 121–128.
Published: 01 February 1975
... as a sur- rogate for the number of opportunities. A deterrent effect is expected: as the number of opportunities between origin i and destination i increases, the flow of migrants from i to j would tend to decrease. Hence, X B appears in the de- nominator of equation (1). Variable X M is included...
Journal Article
Demography (1973) 10 (2): 259–275.
Published: 01 May 1973
... short-distance movements of less than 200 miles and between 600 and 700 miles were most accurately estimated. The least accurately estimated flows by the third regression equation were for per- sons who moved 1,400 or more milee. The magnitude of the average errors of the estimated interstate streams...
Journal Article
Demography (1975) 12 (3): 519–536.
Published: 01 August 1975
... of qualitative differences in the parameter estimates of five different types of migration models estimated for two different time periods, 1960 and 1970. 13 1 2011 © Population Association of America 1975 1975 Ordinary Little Square Employment Growth Migration Flow Migration Model Ordinary...
Journal Article
Demography (1971) 8 (2): 195–204.
Published: 01 May 1971
... simplest form the theory is stated in equation [1] where Mij/Pi is the flow of migration from region i to region j, in relation to the number of people in region i, E is the gain in earnings that can be obtained through migration and C the cost of making the move. ~:f = f(E, 0). [1] Cost is conceived...
Journal Article
Demography (1971) 8 (2): 185–194.
Published: 01 May 1971
...Andrel Rogers; Burkhard von Rabenau Abstract Place-of-birth-by-residence data, tabulated by age and sex for the same areal units in two successive censuses, have been used to estimate intercensal net migration flows. However, a fuller use of the same data permits the estimation of place-to-place...
Journal Article
Demography (1974) 11 (1): 143–148.
Published: 01 February 1974
... (the one-percent sample file of the Social Security Administration) has seen only limited use in studies of aggregate migration flows; second, the combination of model and data pre- sented in the paper have important statistical implications which are not brought out in the paper; third, the study...
Journal Article
Demography (1990) 27 (1): 149–163.
Published: 01 February 1990
...-balancing factors such that the equality of equation (2) holds. From equations (1) and (3), we have N, = r, 2: CigiiMi i or (4) Note that column elements of the flow matrix T represent the probabilities of moving from a given true age interval to any interval i (including that of remaining in the interval...
Journal Article
Demography (1986) 23 (3): 291–311.
Published: 01 August 1986
.... Results Table 3 reports both ordinary least squares (OLS) and TSLS estimates of equation (2) for the flows of adult immigrants who obtain U.S. visas as a result of being (adult) children, siblings, or spouses of U.S. citizens. In all equations, only the stock of naturalized citizens arriving in the United...
Journal Article
Demography (1972) 9 (4): 665–681.
Published: 01 November 1972
... to be discussed later, we have chosen to employ Pi as an in- dependent variable. However, since P, was typically not significantly different from 1.000, we have normalized our mi- gration flows by dividing M ij by Pj, and by employing Pi on the right-hand side of the equation. (One possible means of normalizing...
Journal Article
Demography (1994) 31 (2): 297–319.
Published: 01 May 1994
...-specific IDLT survival functions (small () for states 1 and 2. Then the vector-matrix flow equations of the increment-decrement life table are written l'(x + 1) = l'(x)'P'(x,x + 1), x = 65, 66, , 94. (8) These equations carry the state-specific survival functions from age x to age x + 1 successively...
Journal Article
Demography (1970) 7 (2): 175–183.
Published: 01 May 1970
... relationships between place utility and behavior in searching for and selecting a new residential site are reasonable and can lead to valuable insights into place utility and its functioning in the intra-urban system. Due to some misallocation of migrant flows, however, we further conclude that the model should...
Journal Article
Demography (1989) 26 (3): 499–513.
Published: 01 August 1989
..., Institute of Government and Public Affairs . Mundlak , Y. ( 1978 ). On the pooling of time series and cross section data . Econometrica , 46 , 69 – 85 . 10.2307/1913646 Mueser, P. 1989. The spatial structure of migration: An analysis of flows between states in the U.S. over three decades...
Journal Article
Demography (1982) 19 (1): 125–133.
Published: 01 February 1982
... generation" births are con- stant too. A generation or so after the appearance of "first-generation" births, "second-generation" births B2 start to appear. Since these are born to the con- stant flow of "first generation" births, they number B2 = f: BlP(a)ml(a)da = NRR1B 1 (14) and each year, they too...