We would like to thank Flavio Comim, David Crocker, Sévérine Deneulin, Jean-Luc Dubois, Stefan
Gigacz, the late Denis Goulet, Christine Koggel, Matthias Kramm, Ortrud Lessmann, Laurent
Parrot and Cirad-Agropolis (Montpellier), and (at the Lebret Centre, then in Paris) Yves Berthelot
and Michel Tissier, as well as the contributor authors and reviewers for this special issue, for comments, stimulation, and support in various forms, recently and/or less recently. Responsibility for
views expressed in the paper remains entirely that of the authors.