Positive Profits without Exploitation: A Note on the Generalized Fundamental Marxian Theorem
指出森岛通夫的广义马克思基本定理仅证明正保证利润率需要正剥削率，但通过一个联合生产例子表明，在相同假设下零剥削率与正均衡利润率可以并存。
PROFESSOR MORISHIMA [1, pp. 621-622] has interpreted his own Generalized Fundamental Marxian Theorem (GFMT) as an extension to the joint production case of the theorem stating that, for systems without joint production, a positive rate of exploitation is a necessary and sufficient condition for a positive rate of profit [2, pp. 63-68]. In fact the GFMT only establishes that a positive warranted rate of profit requires a positive rate of exploitation as defined by Morishima; it does not establish that the same holds for a positive equilibrium rate of profit. An example will now be presented which shows that in fact, under the same assumptions as for the GFMT, a zero rate of exploitation is not incompatible with a positive equilibrium rate of profit. Consider an economy where there is only one (constant returns to scale) technique, consisting of a single process, which jointly produces two goods, z and y, utilizing good z and labor L as inputs, in the following proportions: 2z®1L->4z81y