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An OLG Model of Endogenous Growth and Ageing [PDF]
, 2001 To study fully endogenous ageing alongside growth and their implications, this paper sets up an OLG economy in which the life expectancy of agents is endogenous. Agents are bearers of children, investors in education and producers and consumers of output.
Giam Pietro Cipriani, Miltos Makris
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Nonlinear age-dependent models for prediction of population growth
Mathematical Biosciences, 1990In this paper, some new algorithms are proposed to estimate parameter functions in nonlinear age-dependent population models by practical data. These algorithms together with a numerical method are applied to compute the human population using the data provided by the United Nations Demographic Yearbook.
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Physical Review Letters, 1993
It has been reported that the growth mode or Ag on Ag(111), which is usually multilayer (3D), changes to layer-by-layer (2D) growth if Sb is used as a surfactant. In a model study on the clean system Ag/Ag(111) (without any surfactant) we find that two-dimensional layers do grow, if the substrate is prepared with an anomalously high density or Ag ...
, Rosenfeld +4 more
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It has been reported that the growth mode or Ag on Ag(111), which is usually multilayer (3D), changes to layer-by-layer (2D) growth if Sb is used as a surfactant. In a model study on the clean system Ag/Ag(111) (without any surfactant) we find that two-dimensional layers do grow, if the substrate is prepared with an anomalously high density or Ag ...
, Rosenfeld +4 more
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Growth Models in the Age of School Reform and Accountability
2015The reauthorization of the Elementary and Secondary School Act (ESEA) in 2002, also called “No Child Left Behind,” mandated use of accountability systems to evaluate school and district performance. The accountability systems were initially required to use cross-sectional student level assessment results in the evaluation models when assigning ...
Sean W. Mulvenon +2 more
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Age composition and growth without age data: a likelihood-based model
Fisheries Research, 2018Abstract We proposed models capable of jointly estimating age composition and somatic growth parameters (L∞ and K) from length-frequency data without the need to obtain age data. The proposed approach consists of a linear regression in which both the regression coefficients (age composition) and the predictor variables (size distribution at each age)
Diego Corrêa Alves +2 more
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Growth and Yield Models for Uneven-Aged Stands
2012The focus of this chapter is on modeling methods that have been developed specifically for application to uneven-aged forests. The basic frameworks of whole-stand, diameter-distribution, size-class, and individual-tree modeling structures have been adapted to stand types that are age indeterminate.
Harold E. Burkhart, Margarida Tomé
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Joint longitudinal modeling of age of dam and age of animal for growth traits in beef cattle
Journal of Animal Science, 2005Two methods to jointly model age of dam (AOD) and age of animal in random regression analyses of growth in Gelbvieh cattle were examined. The first method (M1) was analogous to the multiple-trait analysis and consisted of AOD as a nested class variable and a cubic polynomial regression on age nested within birth, weaning, and yearly weights. The second
K R, Robbins, I, Misztal, J K, Bertrand
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An age-dependent stochastic model of population growth
The Bulletin of Mathematical Biophysics, 1953A stochastic model of population growth is treated using the Bellman-Harris theory of agedependent stochastic branching processes. The probability distribution for the population size at any time and the expectation are obtained when it is assumed that there is probability (1−σ), 0 ...
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Extinction Probabilities in Stochastic Age-Structured Models of Population Growth
1983Stochastic age-structured models of population growth have received significant attention over the past years, both from a purely theoretical point of view, and with an interest towards applications. This interest sprang from the consideration that many species are iteroparous and that vital parameters vary unpredictably from year to year.
L. Ginzburg, Pugliese, Andrea
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Modeling Growth and Survival in an Age-0 Fish Cohort
Transactions of the American Fisheries Society, 1993Abstract We applied an individual-based model to an age-0 cohort of smallmouth bass Micropterus dolomieu to simulate the cohort's growth and survivorship through its first growing season. The purpose was to determine whether the stock–recruitment characteristics of the age-0 fish could be predicted.
D. L. Deangelis +3 more
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