二、生产弹性与生产投入三阶段的划分 Definition Total revenue(tr)a firm's total earnings from a specified level of sales within a specified period: TR=P×Q Average revenue(AR) Total revenue per unit of output. When all output is sold at the same price, average revenue will be the same as price AR=TR/Q=P Marginal revenue ( MR) The extra revenue gained by selling one more unit per period of time:MR=△ATR/AQ二、生产弹性与生产投入三阶段的划分 Definition Total revenue (TR) A firm’s total earnings from a specified level of sales within a specified period: TR=P×Q. Average revenue (AR) Total revenue per unit of output. When all output is sold at the same price, average revenue will be the same as price: AR=TR/Q=P. Marginal revenue (MR) The extra revenue gained by selling one more unit per period of time: MR=ΔTR/ΔQ