Alternative explanations of wage disparities

suppose that a labor economist claims that recipients of economics phds gain little in terms of acquired productive skills from their graduate studies but that, instead, the degree simply reflects a high level of inherent mathematical ability.

which one of the following characterizes the labor economist's perspective on the link between education and wages?

a. human capital
b. the superstar phenomenon
c. compensating differentials
d. signaling

D. Signaling

Explanation:

According to the signaling theory in education, productivity does not dependent on education, but higher education acts as a "signal" for an individual's greater ability. The labor economist believes that having a PhD in economics reflects a high level of inherent mathematical ability, although it does not change much in acquired productive skills. This view is clearly characterized by signaling.

In Islam, there are two types of messengers which are used by the Quran, the Rasool and the Nabi. Both positions are regarded highly by Islam’s followers. While most if not all messengers were Nabi, only a few were both a Nabi and a Rasool. The difference lies in the responsibilities that each is given.

A Rasool is born a Nabi but becomes officially a Rasool the instant he receives the position and makes it known. Of the several thousand Nabis and the 25 prophets that are mentioned in the Quran, there are five Rasools who are called Ulul azm:

Explanation:

Rasool is defined as a messenger, an individual who was given a new Sharia or code of law by Allah (God). The message is received by the Rasool as a vision while he is asleep or as a conversation with angels while he is awake.