分析下列四例,解释每例是外部规模经济情形,还是内部规模经济:
a.美国印第安纳州埃尔克哈特的十几家工厂生产了美国大多数的管乐器。
b.在美国销售的所有本田车要么是从日本进口的,要么是在俄亥俄州的马里斯维尔生产的。
c.欧洲唯一的大型客机生产商——空中客车公司的所有飞机都在法国土伦组装。
d.康涅狄格州的哈特福德成为美国东北部的保险业中心。
For each of the following examples.explain whether this is a case of external or internal economies of scale:
a.Most musical wind instruments in the United States are produced by more than a dozen factories in Elkhart.Indiana.
b.All Hondas sold in the United States are either imported or produced in Marysville,Ohio.
c.All airframes for Airbus,Europe's only producer of large aircraft,are assembled in Toulouse.France.
d.Hartford,Connecticut,is the insurance capital of the northeastern United States.