These expectations, upon which business decisions depend, fall into two groups, certain individuals or firms being specialised in the business of framing the first type of expectation and others in the business of framing the second.

这些业务决策所依赖的期望分为两组，某些个人或公司专门从事构建第一类期望的业务，而其他人则专门从事构建第二类期望的业务。