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Biomedical subjects

A Prskawetz

Publications and source records attributed to A Prskawetz.

9 recordsLinked to original sources
PubMed2000

Fertility in second unions in Austria: findings from the Austrian FFS.

The simultaneity of decreasing fertility and changing family structures in many European countries has led to a growing interest in fertility behavior in its relation to different family structures. The growing prevalence of higher-order unions (and the consequences for parity progression arising therefrom) is one example of an ongoing change in fertility behavior. Childbearing is not restricted to a single union but may extend over several partnerships. Fertility behavior in higher-order unions is becoming more and more important for determining completed fertility. Motivated by the work of Vikat et al. 1999, the authors investigate fertility behavior in second unions in Austria, focusing on whether and how it is influenced by the number of pre-union children of either partner.

Austria↗
PubMed1998

A model on the escape from the Malthusian trap.

"We propose a model to capture the escape from the Malthusian trap in the longrun. Our aim is to emphasize the key role of endogenous technological progress--as initiated by population growth and education--for longrun economic development. In addition we stress the importance to consider the level of fertility and mortality as the determinants of economic development and not only the rate of population growth. In particular, we may observe different economic growth rates in countries with the same rate of population growth, but differing levels of birth and death rates."

Demography↗
PubMed1997

A brain gain with a brain drain.

"We study human capital depletion and formation in an economy open to out-migration, as opposed to an economy which is closed. Under the assumption of asymmetric information, the enlarged opportunities and the associated different structure of incentives can give rise to a brain gain in conjunction with a brain drain. Migration by high-skill members of its workforce notwithstanding, the home country can end up with a higher average level of human capital per worker."

Demography↗
PubMed1996

Slow-fast dynamics in a model of population and resource growth.

"Models of the interaction of population, the economy, and the environment often contain nonlinear functional relationships and variables that move at different speeds. These properties foster apparent unpredictabilities in system behaviour. Using a simple deterministic model of demographic, economic and environmental interactions we illustrate the usefulness of geometric singular perturbation theory in environmental population economics. In contrast to local stability analysis, the theory of slow-fast dynamics helps to gain new insights into the global behaviour of the system. In particular, the knowledge of the basins of attraction of the stationary states enables one to determine the regions of sustainable future paths of resources and population." (SUMMARY IN FRE)

Conservation of Natural Resources↗
PubMed1995

Endogenous population growth may imply chaos.

The authors consider a discrete-time neoclassical growth model with an endogenous rate of population growth. The resulting one-dimensional map for the capital intensity has a tilted z-shape. Using the theory of nonlinear dynamical systems, they obtain numerical results on the qualitative behavior of time paths for changing parameter values. Besides stable and periodic solutions, erratic time paths may result. In particular, myopic and far-sighted economies--assumed to be characterized by low and high savings rate respectively--are characterized by stable per capita capital stocks, while solutions with chaotic windows exist between these two extremes.

Austria↗
PubMed1995

Life expectancy at age 60--epidemiologic scenarios assuming delayed mortality for selected causes of death.

"The present analysis offers a projection of life expectancy at advanced ages in Austria for the year 2010. To estimate the gains in life expectancy the Simultaneous Multiple Cause-Delay (SIMCAD) method is used. This model takes into account the epidemiological concept of an additional delay in the onset of particular chronic-degenerative diseases. While the results of the SIMCAD method vary only slightly on the whole from the official projection of life expectancy at age 60, the similarity between the two projections decreases steadily with increasing age. The SIMCAD model predicts higher gains in life expectancy for the oldest age-groups of the population than do the official statistics." (SUMMARY IN FRE)

Adult↗
PubMed1994

Endogenous population growth and the exploitation of renewable resources.

The authors consider a demo-economic model where the economy consists of two sectors ("hunting and farming" and "industry"), and both sectors depend directly or indirectly on the explanation of a renewable resource. The primary sector harvests a renewable resource (fish, corn, or wood) which is used as the input into industrial production, the secondary sector of our economy. Labor is divided up between these two sectors under the assumption of competitive labor markets. A system of two nonlinear differential equations for the resources and the population is studied by phase space analysis. Using the Hopf bifurcation theorem, the authors obtain two different routes to limit cycles and prove numerically the existence of a stable Malthusian limit cycle.

Conservation of Natural Resources↗