3.backward integration
尼個我真係唔明佢講乜
I.A form of vertical integration that involves the purchase of suppliers in order to reduce dependency.
II.Backward integration is vertical integration that combines a core business with its suppliers.
邊個先0岩?
你的第一句「尼個行業究竟多唔多公司」,基本上就是這個意思,"concentration ratio" is an indicator of the relative size of firms in relation to the industry as a whole,但最重要的是,經濟學一般都用它來看一個行業的market form,就是有沒有壟斷,market structures怎樣之類..