Abstract. The Knowledge Engineering Review is an outstanding journal in Computer Science. The guest editors and contributors to these two Special Issues are economists. Why is this so? In recent years there has been a growing dialogue between economists and computer scientists, to our mutual benefit. The Special Issues are devoted to nine papers (five in Part 1 and four in Part 2) in which economists survey aspects of the field of agent-based computational economics (ACE) models, and in some cases report on new findings in several areas of application. As such, we hope they have something to offer both computer scientists and economists.

J.E.L. classification codes. A12, C63, C73, D43

Keywords. Agent-based modelling, Economics, Computer science