Many problems in theoretical economics are mathematically formalized as
dynam- ical systems of difference and differential equations. In recent
years a truly open approach to studying the dynamical behavior of these
models has begun to make its way into the mainstream. That is,
economists formulate their hypotheses and study the dynamics of the
resulting models rather than formulating the dynamics and studying
hypotheses that could lead to models with such dynamics. This is a great
progress over using linear models, or using nonlinear models with a
linear approach, or even squeezing economic models into well-studied
nonlinear systems from other fields. There are today a number of
economic journals open to publishing this type of work and some of these
have become important. There are several societies which have annual
meetings on the subject and participation at these has been growing at a
good rate. And of course there are methods and techniques avail- able to
a more general audience, as well as a greater availability of software
for numerical and graphical analysis that makes this type of research
even more excit- ing. The lecturers for the Advanced School on Nonlinear
Dynamical Systems in Economics, who represent a wide selection of the
research areas to which the the- ory has been applied, agree on the
importance of simulations and computer-based analysis. The School
emphasized computer applications of models and methods, and all
contributors ran computer lab sessions.