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A Bioeconomic Foundation of the Malthusian Equilibrium: Body Size and Population Size in the Long-Run

Autor: Carl-Johan Dalgaard and Holger Strulik
Nummer: 373, Aug 2007, pp. 38
JEL-Class: O11, I12, J13

Abstract:
This paper develops a bioeconomic Malthusian growth model. By integrating recent research on allometric scaling, energy consumption and ontogenetic growth, we provide a model where subsistence consumption is endogenously linked to body size and fertility. The theory admits a unique Malthusian equilibrium in a two-dimensional state space characterized by population density and body size (metabolic rate) of the representative adult. As a result, the analysis allows us to examine the link between human biology, economic productivity, body size, and population size. Off the steady-state we investigate the possibility of cyclical behavior of the size of a population and the size of its representative member over the very long-run. We also demonstrate that a take-off into sustained growth should be associated with increasing income, population size and body size. The increase in the latter is, however, bounded and can be viewed as convergence to a biologically determined upper limit.

Zusammenfassung:
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