SEMAINE D'ÉTUDE SUR LE ROLE DE L’ANALYSE ECONOMETRIOUE ETC. LAC The various results corresponding to different values of ®, ® and #=p are given in charts I, II, TIT A and III B. The Exponential Hypothesis and Reality 336. The exponential hypothesis appears to be a very rest. ‘ive one, at least at first sight. However, it is possible to verify that it may in fact provide a quite fair approximation to real conditions. From this point of view, there are three particularly important coefficients to be considered. These are k, ©, and À defined by the relations (!) 336-1) 336-2) '336-3) I" B(0)do ©, a eB(e)de A —=— [ Ÿslo)ae 2k@ J As it has already been noted, k should be taken as not oreatly differing from unity (3). M) Relations (211-3), (220-5) and (220-6) 2) § 311. | Allais - pag. 173