On Sunday 13 October all the Participants were received in a Solemn Audience by the Supreme Pontiff and after the Audience an extraordinary session of the Academy was held at the Seat of the Pontifical Academy of Sciences, to which the Participants in the Study Week were also invited.
All participants in the Study Week received all papers in advance. During the Study Week, each paper was discussed both in a panel [1] and in a plenary session, with the exception of two papers (Stone and Frisch) which were discussed directly during the plenary. The papers have been put here in as close a succession as possible to their order of presenta-tion and discussion.
[1] First group: Stone (President), Dorfman, Johnson, Kopmans, Mahalanobis, Malinvaud, Morishima, Pasinetti, Schneider. Second group: Leontief (President), Allais, Fisher, Frisch, Haavelmo, Isard, Theil, Wold.