On average, middle-aged people tend to have higher incomes than ...

[j.rubin]

On average, middle-aged people tend to have higher incomes than younger or older people do because:
 a. they receive more money from the government than younger or older people do.
  b. they are at an age where their productivity is at its peak.
 c. they participate in the labor force to a lesser extent than do the young or the old.
  d. they are subject to lower rates of taxation than are younger or older workers.

Question 2

A firm that fills its vacancies in the upper levels of the hierarchy with its own employees:
 a. avoids opportunistic behavior by employees.
  b. uses an internal labor market.
  c. avoids the difficult tasks of measuring and comparing the productivities of individual workers.
  d. pays them according to their performance rather than seniority.

[tkempin]

Answer to Question 1

b

Answer to Question 2

B

[j.rubin]

Gracias!

[T4T]

TYSM