RES (Review of Economic Studies) , January, 1971, concerning whether or not Gorman's Lemma 1 (RES, 1968) can be strengthened by re-laxing Gorman's assumption of arc-connectivity for the space of prospects to connectivity alone. A lemma is proved showing the mentioned relaxation feasible and furnishing proof for Gorman's Lemma 1. This supplies a missing foundation stone of Gorman's "Structure of Utility Functions " and generalizes the results therein.

In Italian: Lo Spazio nei Piani Economici, Franco Angeli Editore, Milan, 1972, 391 p. In Spanish: El Factor Espacio en la Planificación del Desarollo, Series ‘Fondo de Cultura Económica’, Fondo de Cultura Económica, Mexico, 1980, 405 p.