Questions & explanations
1. How can government intervention, such as a minimum wage, affect a bilateral monopoly?
A minimum wage sets a floor below which wages cannot fall. In a bilateral monopoly, if the minimum wage is set between the monopsony wage and the competitive wage, it can raise wages without reducing employment much, depending on the bargaining. If the minimum wage is set above the union's desired wage, it may reduce employment as the employer hires fewer workers. However, because both parties bargain, the minimum wage can change the bargaining power. For example, a higher minimum wage might strengthen the union's hand, leading to even higher negotiated wages, but also potentially lower employment. Alternatively, it might force the employer to accept a wage that is closer to competitive, reducing inefficiency. The effect depends on the level of the minimum wage relative to the underlying supply and demand.
2. Compare the wage and employment outcomes in bilateral monopoly with a monopsony without a union.
Without a union, a monopsony employer sets a wage below the competitive level and hires fewer workers than in a competitive market. The wage is determined where the marginal cost of labor equals the marginal revenue product of labor. In bilateral monopoly, the union bargains for higher wages, raising the wage above the monopsony level. However, because the employer can adjust employment, the negotiated wage may still be below the competitive level, but it is generally higher than the monopsony wage. Employment in bilateral monopoly can be either higher or lower than in monopsony. If the union focuses only on wages, employment might fall. If the union also cares about jobs, it may agree to a lower wage to maintain employment, potentially raising employment above the monopsony level.
3. Compare labor demand under oligopsony with labor demand under a single monopsony.
In both cases, the employer(s) have market power, so wages are below the competitive level. In monopsony, a single firm faces the entire market labor supply curve, so its wage-setting power is maximal. It hires where MCL = MRPL, resulting in a specific wage and employment. In oligopsony, each firm faces a share of the supply, and they interact strategically. The outcome depends on the degree of collusion or competition among employers. If they collude (act as a cartel), the outcome can mimic monopsony with even lower wages. If they compete, wages may be higher but still below competitive. Generally, oligopsony yields wages between monopsony and competitive, but employment can be higher or lower depending on the firms' strategic behavior.
4. How does the number of firms in a monopolistically competitive market affect labor demand of each firm?
An increase in the number of firms reduces each firm's market share, shifting its product demand curve leftward (less quantity sold at each price). This lowers the MRPL curve, so each firm hires fewer workers at any given wage. Also, with more firms, product demand becomes more elastic because consumers have more substitutes. This increased elasticity can partially offset the leftward shift by raising MR, but generally, the leftward effect dominates. In the long run, entry continues until economic profit is zero. At that point, each firm's labor demand is determined by the zero-profit condition. In equilibrium, more firms mean lower output and employment per firm, but industry total employment may be higher or lower depending on scale.
5. Why do some countries have lower unemployment than others?
Different countries have different unemployment rates because of their labor market rules and economic structures. For example, countries with flexible labor markets, like the United States, often have lower average unemployment but more short-term job changes. Countries with strong job protection laws, like France, may have higher unemployment for young people but more stable jobs for those employed. Also, economies that grow faster can create more jobs, lowering unemployment. The generosity of unemployment benefits affects how long people stay jobless. And training systems that match workers to job openings help reduce unemployment. So no single factor explains the differences; it is a mix of policies and economic conditions.
6. How does a union affect wage and employment in a bilateral monopoly?
The union bargains for higher wages and may also influence employment. In a bilateral monopoly, the union uses its bargaining power to raise wages above the monopsony level. However, the employer may then reduce employment in response, as the marginal cost of labor rises. The actual outcome depends on the relative bargaining power: if the union is strong, wages might approach the competitive level or even higher, but employment might be lower than competitive. If the employer is strong, wages stay near the monopsony level, and employment may be higher because the union does not push for a large wage increase. The union can also negotiate over employment directly, potentially achieving a more efficient outcome.
7. Compare the speed of unemployment recovery after the 2008 crisis and after the Great Depression.
After the Great Depression, it took over a decade for unemployment to fall back to normal levels. The recovery was slow because there was no strong government response at first, and the banking system was ruined. After the 2008 crisis, unemployment fell more quickly in most developed countries. For instance, US unemployment peaked at 10% in 2009 and dropped to around 5% by 2015. This faster recovery was due to aggressive action by governments and central banks to boost demand and fix banks. However, in some European countries like Greece and Spain, unemployment stayed very high for years because of problems inside the euro area. So speed of recovery depends on policy choices and the structure of the economy.
8. Why is the equilibrium wage and employment indeterminate in bilateral monopoly?
In bilateral monopoly, both parties have market power and their objectives conflict. There is no unique market-clearing price because the employer and union can negotiate a range of possible wages and employment levels, all of which lie along the contract curve (efficient combinations where neither can be made better off without making the other worse off). The actual outcome depends on bargaining power, negotiation tactics, and institutional factors like the threat of a strike or lockout. Economic theory alone cannot pinpoint a single equilibrium; the result is determined by the bargaining process. This indeterminacy is why bilateral monopoly models often use game theory or empirical negotiation outcomes.
9. Why is the translog cost function considered flexible? What are its limitations?
The translog is flexible because it can approximate any twice-differentiable cost function locally. It does not impose constant substitution elasticities or fixed cost shares. It can capture non-homothetic scale effects. However, it has limitations: it may not satisfy global properties like monotonicity or concavity for all data points. It also requires many parameters, which can cause multicollinearity and inefficient estimates with small samples. Additionally, the translog is only a second-order approximation; extrapolating far from the sample mean can give poor results. Despite these issues, it remains a popular tool for estimating labor demand because it balances flexibility and ease of estimation.
10. Derive the labor demand curve for a firm in monopolistic competition using the MRPL concept.
The firm's profit-maximizing rule is to hire labor until the marginal revenue product of labor (MRPL) equals the wage (W). MRPL is the extra revenue from hiring one more worker: MRPL = MR * MPL, where MR is marginal revenue from selling one more unit and MPL is the marginal product of labor. Since the product demand is downward-sloping, MR < price. To derive the labor demand curve, solve the profit-maximizing condition for L as a function of W, given the production function and product demand. Because MR falls as output increases, the MRPL curve slopes downward more steeply than VMP. An increase in product demand (shift outward) will raise MRPL and thus increase labor demand at any given wage.
11. What is a bilateral monopoly in the labor market?
A bilateral monopoly occurs when there is a single buyer of labor (monopsony employer) and a single seller of labor (monopoly union) in the same market. The employer wants to pay low wages, and the union wants high wages. Both have market power. The employer faces an upward-sloping labor supply curve, and the union faces a downward-sloping labor demand curve. The wage and employment outcome is determined by bargaining between the two parties. This is common in industries like professional sports (league vs. players' union) or some public sector jobs. The result is typically a wage between the monopsony wage and the monopoly union wage, and employment also lies between the two extremes.
12. How can antitrust policy address low wages in an oligopsony?
Antitrust policy can promote competition among employers. For example, it can prevent mergers that would reduce the number of employers in a labor market. It can also prohibit collusion such as agreements not to poach workers or fix wages. By ensuring a larger number of independent employers, the labor supply curve facing each firm becomes more elastic, reducing their market power. This can lead to higher wages and more employment toward the competitive level. However, applying antitrust to labor markets is relatively new and requires proving that employers have market power. Some policies also include minimum wage laws as a direct tool to set a floor, complementing antitrust efforts.