The context of competition -- Game theory and gaming -- Measurement and modeling -- One-period markets -- Endogenizing the monetary system -- The economy : time, size and complexity -- Building theories of economic process -- Uncertainty and velocity -- Preamble -- Innovation and evolution :...

The fuzzy behaviour of preference tries to introduce indivi- duals whose preferences are not necessarily clear or coher- ent. The agents who have imprecise preferences are much more shaded. On the contrary of Boolean agents, fuzzy agents can- not decide anything with their only preferences....

Fuzzy set theory, which started not much more than 20 years ago as a generalization of classical set theory, has in the meantime evolved into an area which scientifically, as well as from the point of view of applications, is recognized as a very valuable contribution to the existing knowledge....

Chapter 1. Introduction -- Chapter 2. Rationality of choices made by individual consumer -- Chapter 3. Rationality of choices made by groups of consumers -- Chapter 4. Rationality of choices made by individual producers -- Chapter 5. Rationality of choices made by groups of producers by...