生产弹性与生产投入三阶段的划分 The rational region of production o The producer should apply at least as much input as to achieve the maximum average product o The producer should not apply any more input once the marginal product is zero o Within these limits(the rr of p) the optimum input use is determined by the price of the input relative to the price of the output二、生产弹性与生产投入三阶段的划分 The rational region of production l The producer should apply at least as much input as to achieve the maximum average product. l The producer should not apply any more input once the marginal product is zero. l Within these limits (the RR of P) the optimum input use is determined by the price of the input relative to the price of the output