A multiple gap approach to spatial economics

In previous work investment and regional location have been analysed in terms of gaps or thresholds that should be closed or passed in order to produce operational results (growth, local development).  The topic is taken up again using a min-algebra which, at least to the knowledge of the author, has not yet be applied to (theoretical) spatial economics, though max-plus algebra has been used to tackle scheduling problems.  Examples of multiple gap situations will be given, together with their econometric implications; min-algebra will be defined, and examples of its applications worked out; topics for further research will be presented in conclusion. Received: October 2000/Accepted: September 2001