Bedau and Packard [7] devised an approach to quantifying the adaptive phenomena in artificial systems. We use this approach to define two statistics: cumulative evolutionary activity and mean cumulative evolutionary activity. Then we measure the dynamics of cumulative evolutionary activity, mean...

What is a strategy? The answer to this question ought to depend on the foresight horizon: how far ahead, and how much, the strategist thinks he can forsee. When the very structure of the firm's world is undergoing cascades of rapid change, and interpretations about the identity of agents and...

Recent work on the structure of social networks and the internet has focussed attention on graphs with distributions of vertex degree that are significantly different from the Poisson degree distributions which have been widely studied in the past. In this paper we develop in detail the theory...

If the field of Artificial Life (``ALife'') is successful, we will be forced to confront some difficult moral and philosophical issues which we might otherwise have been able to avoid. The ability to create new life forms as well as destroy existing ones will place a greator responsibility upon...

Segregation Distorters are genetic elements that disturb the meiotic segregation of heterozygous genotypes. The effect is hence often referred to as meiotic drive. The driving chromosome destroys its partner, provided the latter is not resistant against the "killer." The dynamic behavior of a...

We construct explicit equilibria for strategic market games used to model an economy with fiat money, one nondurable commodity, countably many time- periods, and a continuum of agents. The total production of the commodity is a random variable that fluctuates from period to period. In each...

The concept of ``scientific understanding'' is a very constrained form of knowledge, requiring some technical and empirical consensus, as well as satisfying logical restrictions. Despite these restrictions, the scientific knowledge that is associated with dynamic processes contains an amazingly...

We use a quantitative definition of specificity to develop a neural network for the identification of common protein binding sites in a collection of unaligned DNA fragments. We demonstrate the equivalence of the method to maximizing Information Content of the aligned sites when simple models of...

The paper describes the application of Genetic Algorithms to a Resource Economics problem; the decision about the intensity of exploitation of a renewable resource. Genetic Algorithms, developed by HOLLAND (1975), are a model of biological evolution, that captures some important features of...

We present a general theorem restricting properties of interfaces between thermodynamic states and apply it to the spin glass excitations observed numerically by Krzakala-Martin and Palassini-Young in spatial dimensions d=3,4. We show that such excitations, with interface dimension strictly...