They also depend crucially on inflation growth differentials and productivity growth differentials .

起决定性作用的还应取决于通货膨胀率增长差异和生产率增长差异。

The issue of productivity growth differentials to which I have already alluded is less ambiguous .

我前面已经提到的，生产力增长的差异问题则比较更清楚。

An explanation concerning the mechanism or reason why the differentials are not equalized by competition , and

对为什么差异不会因竞争而均衡的机制或原因做出解释，

He gives such examples : what is the source of economic profits and performance differentials in profits between individual firms ?

他举了以下几个例子：什么是经济利润的来源以及各企业间利润业绩差异的来源？

What unites them is the same paradigmatic base : to identify the sources and mechanism of persistent firm differentials .

将它们统一起来的仍然是相同的范式基础：识别可持续的企业差异的来源与机制。