Question

a. in the model of labor - market dynamics presented in the chapter, what three exogenous variables could change to reduce steady - state unemployment?
number of employed workers (e); number of job vacancies (v); and the number of unemployed workers (u)
number of unemployed workers (u); efficiency of job matching (μ); and the number of jobs (j)
size of labor force (l); efficiency of job matching (μ); and the number of jobs (j)
size of labor force (l); efficiency of job matching (μ); and the number of job vacancies (v)
b. which of the following is a policy that might move one of those variables in the right direction?
policies that limit the amount of children a family can have
higher minimum wages
increased unemployment insurance amounts
subsidies given to firms who use online job boards (such as ziprecruiter)

Explanation:

• Part a:
• In the labor - market dynamics model, the steady - state unemployment rate \(u=\frac{1}{1 + \mu\frac{J}{L}}\) (where \(u\) is the unemployment rate, \(\mu\) is the efficiency of job - matching, \(J\) is the number of jobs, and \(L\) is the size of the labor force).
• If the size of the labor force (\(L\)) increases (assuming other factors remain relatively stable in the short - run for the sake of this model analysis), the denominator of the unemployment rate formula gets larger, which can reduce the unemployment rate.
• An increase in the efficiency of job - matching (\(\mu\)) means that more unemployed workers can find jobs more quickly, reducing the unemployment rate.
• An increase in the number of jobs (\(J\)) (more job opportunities) also makes it easier for the unemployed to find work, reducing the unemployment rate.
• Part b:
• Subsidies given to firms who use online job boards (such as ZipRecruiter) can increase the efficiency of job - matching (\(\mu\)). Online job boards can better connect unemployed workers with job vacancies, which is in line with the variable (efficiency of job - matching) that affects the labor - market dynamics model to reduce unemployment.
• Policies that limit the amount of children a family can have do not directly relate to the key variables (\(L\), \(\mu\), \(J\)) in the labor - market dynamics model for reducing unemployment.
• Higher minimum wages can sometimes lead to firms reducing the number of jobs (\(J\)) (as labor costs increase), which may increase unemployment rather than reduce it.
• Increased unemployment insurance amounts may reduce the incentive for unemployed workers to quickly find jobs (as they have more financial support while unemployed), which is not in the direction of reducing unemployment.

Answer:

a. size of labor force (\(L\)); efficiency of job matching (\(\mu\)); and the number of jobs (\(J\))
b. Subsidies given to firms who use online job boards (such as ZipRecruiter)