跨国公司垂直关系选择涉及3种基本形式, 即一般市场交易形式、垂直一体化和垂直约束。通过建立模型可以发现, 垂直约束显示出与垂直一体化相似的效果, 即通过非一体化方式完全可以获得一体化的结果。跨国公司选择垂直关系形式时所涉及的成本和收益因素众多, 在某一特定时点或时期, 没有哪一种模式能够保持绝对优势地位, 因而, 跨国公司可能会在某个特定时期选择某种垂直关系形式, 在另一个时期选择另一种形式, 或者采取几种垂直关系基本形式的某种组合。

There are three forms of vertical relationship in a transnational corporation(TNC), namely, market transaction, vertical integration, and vertical restraint.The model indicates that the vertical restraint and vertical integration have more similar effects.A corporation can obtain an integration result by means of a non-integration form.A transnational corporation will select a certain form of vertical relationship at a given time and select another form in another period, even a combination of basic forms of vertical relationship, since every form has its own advantages owing to cost and various beneficial factors.