李同学2019-03-26 18:17:12

Which of the following most accurately describes economies of scale? A Economies of scale increase at a decreasing rate. B Economies of scale occur when long-run unit costs fall as output increases. C Economies of scale are dependent on short-run average costs. 查看解析 上一题 下一题 正确答案B 您的答案B本题平均正确率：76% Economies of scale and diseconomies of scale难度：一般 推荐：      答案解析 Economies of scale occur when the percentage increase in output is greater than the percentage increase in the cost of all inputs. Economies of scale occur over the range where the long-run average cost curve slopes downward. 问：1.对应我画的图（左），看规模效应这一边 这条包络线的斜率的绝对值应该是越来越小，所以意味着 规模经济效应以一个降低的速率上升吧，不正是A形容的吗？2.我画的图（右），讲解里说 规模经济的另一种理解：Q增增 TC增，如果对应图的话 是不是我在图中用绿色线描出来的部分？