Using data for the country described in the table below:
Population (millions) 200 400
Labor Force (millions) 100 200
Number Employed (millions) 90 185
Number Unemployed (millions)
Unemployment Rate (percent)
a. Determine the Number of Unemployed and the Unemployment Rate for each year by completing the table.
b. Briefly explain why, in general, the unemployment rate might decline between two time periods, even if the number of unemployed workers goes up during the same time period.