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Dementia in Parkinson's Disease:Demographic Models and Estimates
Dementia Parkinson's Disease Demographic Models Estimates
2016/3/18
It is difficult to measure incidence and prevalence rates for rare conditions.For very rare conditions, the sample size requirements begin to approach the total population size. However, there is a ...
Report on IUSSP Seminar on Space and Time in Historical Demographic Studies - New Methods and Models
Space and Time Historical Demographic Studies New Methods and Models
2015/6/26
Organized and funded by the IUSSP Scientific Committee on Historical Demography in collaboration with the Inter-university Consortium for Political and Social Research, University of Michigan, USA, an...
A matrix approach to the statistics of longevity in heterogeneous frailty models
frailty heterogeneity individual stochasticity longevity Markov chains mortality
2014/11/27
Background: The gamma-Gompertz model is a fixed frailty model in which baseline mortality increases exponentially with age, frailty has a proportional effect on mortality, and frailty at birth follows...
Ethnic Models of Fertility Behaviour in Sri Lanka
Fertility Behaviour Sri Lanka Ethnic Models
2009/4/24
Sri Lanka's multi-ethnic society provides a useful example of how fertility behaviour can be affected by ethnic differences. This article elaborates on the possible sources, extent and nature of the v...
Perturbation analysis of nonlinear matrix population models
age averages barnacles density-dependence dependency ratios elasticity homeostasis immigration matrix calculus matrix population models population cycles sensitivity Tribolium two-sex models
2008/12/16
Perturbation analysis examines the response of a model to changes in its parameters. It is commonly applied to population growth rates calculated from linear models, but there has been no general appr...
Intrinsically dynamic population models
dynamic models dynamic population models eigenvalues Leslie matrices population momentum
2008/12/9
Intrinsically dynamic models (IDMs) depict populations whose cumulative growth rate over a number of intervals equals the product of the long term growth rates (that is the dominant roots or dominant ...
The problematic estimation of “imitation effects” in multilevel models
bias endogenous estimation imitation effect models multilevel simulation survey
2008/12/5
It seems plausible that a person’s demographic behaviour may be influenced by that among other people in the community, for example because of an inclination to imitate. When estimating multilevel mod...