Pure joint production
通过数值例子和简单经济论证，说明单产品系统与多产品系统的行为差异，指出纯联合生产中单产品系统的常规法则均不成立，并挑战了Schefold的分析。
The gap between the behavior of single and multiple-product systems is illustrated by numerical examples and simple economic arguments. It appears that none of the usual laws of single-product systems holds true in pure joint production, even in the framework studied by B. Schefold. In a more general case, the number of operated methods may fall short of that of commodities and the very notion of prices of production is at stake. Schefold's analysis is thus challenged. The study of pure joint production also sets a number of methodological questions which are fundamental for post-Sraffian economics. Copyright 1997 by Oxford University Press.