Complexity needs strategy first rather than simplification; Why I am a satisficing and unrepentant simonian

Keynote Lecture at the plenary session of the EAEPE 2002 Conference, Aix en Provence, Nov 7 2002. Paru fin 2005 dans : J Finch & M Orillard, ’Complexity and the Economy, Implication for Economic policy’, ed Edwar Elgar, 2005 , ISBN 1 84376 668 X ,p. 54-76