In this study, we explore the relationships among group size, the extent of interactions with other groups, and group performance in a stochastic environment. We have developed a modeling framework which allows the connections among the individual members constituting a group and the connections...

Technological change at the firm level has commonly been modeled as random sampling from a fixed distribution o f possibilities. Such models, however, typically ignore empirically important aspects of the firm's search process, notably the observation that the present state of the firm guides...

Technological change at the firm-level has commonly been modeled as random sampling from a fixed distribution of possibilities. Such models typically ignore empirically important aspects of the firm's search process, namely the related observations that a firm's current technology constrains...

Adaptive walks are an optimization technique for searching a space of possible solutions, for example, a space of different molecules. The goal is to find a point in space (a molecule) optimal or near-optimal in some property, generally referred to as the ``fitness,'' such as its ability to bind...

Optimization of systems with many conflicting constraints arises in numerous settings. Common optimization procedures seek to improve performance of the system as a whole. We show that coevolutionary problem solving, in which a system is partitioned into subsystems each of which selfishly...

Complex, fractal structures are widespread in ecological systems and in some characteristic features of evolutionary processes. The origin of such patterns in terms of their dynamics is a challenging problem. A theory for these phenomena might have important implications in issues like the...

Control rules governing activity of eukaryotic genes appear strongly biased toward large numbers of "canalizing" inputs. The ensemble of networks with the observed bias predicts cells are in an ordered regime with convergent flow in transcription state space, a percolating subnetwork of genes...

The critical boundaries separating ordered from chaotic behavior in randomly wired S-state networks are calculated. These networks are a natural generalization of random Boolean net and are proposed as an extended approach to genetic regulatory systems, sets of cells in different states or...