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Dynamics of a Simple Evolutionary Process

Stauffer, Dietrich; Newman, M. E. J. - Santa Fe Institute - 2001

We study the simple evolutionary process in which we repeatedly find the least fit agent in a population of agents and give it a new fitness which is chosen independently at random from a specified distribution. We show that many of the average properties of this process can be calculated...

Persistent link: https://www.econbiz.de/10005260362

Classification of Long-Term Evolutionary Dynamics

Bedau, Mark A.; Snyder, Emile; Packard, Norman H. - Santa Fe Institute - 1998

We present empirical evidence that long-term evolutionary dynamics fall into three distinct classes, depending on whether adaptive evolutionary activity is absent (class 1), bounded (class 2), or unbounded (class 3). These classes are defined using three statistics: diversity, new evolutionary...

Persistent link: https://www.econbiz.de/10005837717

Selection Dynamics in Autocatalytic Systems: Templates Replicating Through Binary Ligation

Wills, Peter R.; Kauffman, Stuart A.; B\"arbel M. R. Stadler - Santa Fe Institute - 1997

The theory of autocatalytic binary ligation is reviewed within the context of a rigorously applied Michaelis-Menten quasi-steady-state approximation to obtain explicit analytical results describing time-course data from experiments. A detailed protocol for the step-wise elucidation of a minimal...

Persistent link: https://www.econbiz.de/10005837730

Optimization in Complex Networks

Cancho, Ramon Ferrer i; Solé, Ricard V. - Santa Fe Institute - 2001

Many complex systems can be described in terms of networks of interacting units. Recent studies have shown that a wide class of both natural and artificial nets display a surprisingly widespread feature: the presence of highly heterogeneous distributions of links, providing an extraordinary...

Persistent link: https://www.econbiz.de/10005739984

The Role of Population Size, Pleiotropy, and Fitness Effects of Mutations in the Evolution of Overlapping Gene Functions

Wagner, Andreas - Santa Fe Institute - 2000

evolution of functional overlap and mean fitness are effectively decoupled, because they occur on different time scales. As a …

Persistent link: https://www.econbiz.de/10005740004

Error Propagation in the Hypercycle

Campos, P. R. A.; Fontanari, J. F.; Stadler, P. F. - Santa Fe Institute - 1999

We study analytically the steady-state regime of a network of n error-prone self-replicating templates forming an asymmetric hypercycle and its error tail. We show that the existence of a master template with a higher non-catalyzed self-replicative productivity, a, than the error tail ensures...

Persistent link: https://www.econbiz.de/10005623628

Developmental and Non-Developmental Morphospaces in Evolutionary Biology

Eble, Gunther J. - Santa Fe Institute - 1999

effects, is powerful evidence for a controlling influence of ontogeny. Appropriate choices involve three kinds of contrasts … evolution, but any regularities encountered must reflect internal constraints and opportunities. Juvenile morphospaces are … likely to depict a range of pronounced allometries that can serve as raw material for evolution. I provide an extended …

Persistent link: https://www.econbiz.de/10005623654

Phase Transitions in a Gene Network Model of Morphogenesis

Solé, Ricard V.; Salazar-Ciudad, Isaac; … - Santa Fe Institute - 1999

types of interaction but are much more common in the inductive case. These results support the idea that evolution does not …

Persistent link: https://www.econbiz.de/10005623658

An Explanation of Generic Behavior in an Evolving Financial Market

Joshi, Shareen; Bedau, Mark A. - Santa Fe Institute - 1998

The Santa Fe Artificial Stock Market [13, 4] is an agent-based artificial model in which agents continually explore and develop expectational models, buy and sell assets based on the predictions of those models that perform best, and confirm or discard these models based on their performance...

Persistent link: https://www.econbiz.de/10005790623

Market Force, Ecology, and Evolution

Farmer, J. Doyne - Santa Fe Institute - 1998

studied in the dynamical context of pattern evolution. The evolution of the capital of a strategy is analogous to the … evolution of the population of a biolgoical species. Several different arguments suggest that the timescale for market …

Persistent link: https://www.econbiz.de/10005790624