• International Economic Policy Co-Ordination ,Blackwells, with Carlo Carraro, Didier Laussel,  and Antoine Soubeyran
•  Learning and Rationality in Economics, Blackwells,  with Alan Kirman

• Nonlinear Dynamics and Economics,  Cambridge University Press, ( with Alan Kirman and Bill Barnett)

• Applications of Differential Geometry to Econometrics with Paul Marriott, Cambridge University Press