Search Results - subject:"allometry"

Cities as Organisms: Allometric Scaling of Urban Road Networks

Samaniego, Horacio; Moses, Melanie E. - In: The Journal of Transport and Land Use 1 (2008) 1, pp. 21-39

We propose a statistical approach to determine the features of urban road networks affecting accessibility. Our approach is inspired by metabolic scaling theory (MST) in biology (West et al. 1997). <p> We study the structure of road networks across 425 cities of different sizes in the USA. We show...</p>

Persistent link: https://www.econbiz.de/10008676571

Empirical analysis on the connection between power-law distributions and allometries for urban indicators

Alves, L.G.A.; Ribeiro, H.V.; Lenzi, E.K.; Mendes, R.S. - In: Physica A: Statistical Mechanics and its Applications 409 (2014) C, pp. 175-182

We report on the existing connection between power-law distributions and allometries. As it was first reported in Gomez-Lievano et al. (2012) for the relationship between homicides and population, when these urban indicators present asymptotic power-law distributions, they can also display...

Persistent link: https://www.econbiz.de/10011063809

Trade-offs within and between sexual traits in stalk-eyed flies (Diptera: Diopsidae)

Fry, Catherine L - 2006

The allocation of limited resources to competing body parts during development may affect both the absolute and relative sizes of physical traits, creating potentially dramatic consequences for the evolution of morphology. While negative correlations between the sizes of body parts...

Persistent link: https://www.econbiz.de/10009450827

The offspring-size/clutch-size trade-off in mammals.

Charnov, Eric; Ernest, S.K.M. - 2006

The Smith-Fretwell model for optimal offspring size assumes the existence of an inverse proportional relationship (i.e., trade-off) between the number of offspring and the amount of resources invested in an individual offspring; virtually all of the many models derived from theirs make the same...

Persistent link: https://www.econbiz.de/10009429646

Analisi della crescita economica regionale e convergenza: un nuovo approccio teorico ed evidenza sull’Italia

Coccia, Mario - Istituto di Ricerca sulla Crescita Economica … - 2006

This paper proposes a new method to measure and analyse the typology of regional economic growth and convergence The model was originally developed by biologists in their study of morphological change of organisms. The paper investigates Italian regions using data of Gross Domestic Product per...

Persistent link: https://www.econbiz.de/10005087036

Gli approcci biologici nell’economia dell’innovazione

Coccia, Mario - Istituto di Ricerca sulla Crescita Economica … - 2005

The innovation is a main variable of the economic growth, but the origin and diffusion of innovations are functions of several variables. For this reason, the contributions of other disciplines have been used to understand in depth its behaviour and spatial-temporal dynamic. The aim of this...

Persistent link: https://www.econbiz.de/10005459384

Allometry and growth: A unified view

De Martino, S.; De Siena, S. - In: Physica A: Statistical Mechanics and its Applications 391 (2012) 18, pp. 4302-4307

Allometry is crucial in biology; scaling relations are implied in laws of growth of living systems. The self similarity … allometry is emerging, such as economics, urban planning and the social sciences. …

Persistent link: https://www.econbiz.de/10010590894

Are allometry and macroevolution related?

West, Bruce J.; West, Damien - In: Physica A: Statistical Mechanics and its Applications 390 (2011) 10, pp. 1733-1736

The allometric relationship between the basal metabolic rate B and total body mass M is B = aMb, where the allometry … coefficient a and the allometry exponent b have been fit to various data sets for over 150 years. The best fit of the allometry … model and with some notable exceptions ignored the allometry coefficient a altogether. Herein, we shift the focus and use …

Persistent link: https://www.econbiz.de/10011058810

Allometric scaling of countries

Zhang, Jiang; Yu, Tongkui - In: Physica A: Statistical Mechanics and its Applications 389 (2010) 21, pp. 4887-4896

As huge complex systems consisting of geographic regions, natural resources, people and economic entities, countries follow the allometric scaling law which is ubiquitous in ecological, and urban systems. We systematically investigated the allometric scaling relationships between a large number...

Persistent link: https://www.econbiz.de/10010591619

THE DYNAMICS OF REGIONAL GDP IN THE EURO ZONE FROM 1980 TO 2005: ECONOMIC GROWTH OR DEVELOPMENT?

Zanin, L. - In: Regional and Sectoral Economic Studies 7 (2007) 2, pp. 65-76

This paper aims to determine and analyse the typology and intensity of the economic growth through an approach to the structure of the allometric models, previously developed by biologists. It could be important for political decision-takers to know the type of growth since it allows the...

Persistent link: https://www.econbiz.de/10005406741