Stephen Wolfram’s A New Kind of Science should have made a greater impact in economics - at least in its theorising and computational modes – than it seems to have. There are those who subscribe to varieties of agent-based modelling, who do refer to Wolfram’s paradigms - a word I use with...

In his stimulating Nobel Prize Lecture, Paul Samuelson made the important point that there were interesting macrodynamic systems which could, in no sensible sense, be associated with maximization problems. The paradigmatic example he chose was the multiplier-accelerator system. In this paper I...