Background: Surveys of chronic health conditions provide information about prevalence but not about the incidence and the process of change within the population. Objective: We show how the “age dynamics” of chronic conditions ‐‐ the probabilities of contracting the conditions at...

OBJECTIVE: The paper explores the population effects of male preference stopping rules and of alternative combinations of fertility rates and male-biased birth sex ratios. METHODS: The “laboratory” is a closed, stable population with five age groups and a dynamic process represented by a...

Population aging is a problem common to many countries: an increasing proportion of retired people, a decreasing proportion of working age, and resultant downward pressure on national product per capita. We explore longer-run aspects of immigration as a policy instrument in this context. We...

We derive transition probability matrices for chronic health conditions using survey prevalence data. Matrices are constructed for successive age groups and the sequence represents the “age dynamics” of the health conditions for a stationary population – the probabilities of acquiring the...

This study uses survey data relating to the United States commercial sector to estimate and interpret annual energy demand relationships in which account is taken of energy and non-energy prices, building characteristics, and weather information. It applies the estimated US relationships to the...

THRILS is a computer program that embodies a model designed to generate daily and weekly electricity load profiles for 31 industries in 7 regions for each of 12 months under various user-controlled assumptions about weather conditions. The present report describes THRILS briefly but its main...

This report is the Users' Manual that accompanies MEDS-E, the economic component of a new Windows-based version of the MEDS (Models of the Economic-Demographic System) software. MEDS-E is designed to make use of the all-Canada population and labour force projections from PMEDS-D in projecting...

The effects of population change on requirements for physicians in Ontario are studied. Principal findings are the following: (a) contrary to popular belief, the overall increase in requirements will be significantly lower in 2000-2020 than in the preceding two decades; (b) population aging...

This report is the Users' Manual that accompanies PMEDS-D, the demographic component of a new Windows-based version of the MEDS (Models of the Economic-Demographic System) software. PMEDS-D is designed for projecting and/or simulating the population, labour force, and number of households for...

The paper explores the effects of immigration on the rates of growth of the population and labour force and on the age distribution and dependency relations within the population. Projections are presented and the consequences of different future rates of immigration are investigated. Dependency...