What Have Economists Who Study the Value of Skills in the Labour

Multiple Choice

What have economists who study the value of skills in the labour markets documented

A) a decrease in the earnings gap between low-skill and high-skill workers over the past 27 years in the United States but not in Canada
B) an increase in the earnings gap between low-skill and high-skill workers over the past 27 years in Canada, but not in the United States
C) a decrease in the earnings gap between low-skill and high-skill workers over the past 27 years in both Canada and the United States
D) an increase in the earnings gap between low-skill and high-skill workers over the past 27 years in the United States, but not in Canada