Markets for Factors of Production: Microeconomics Study Notes

Markets for Factors of Production

The Anatomy of Factor Markets

Factor markets are where the resources used to produce goods and services are bought and sold. The four main factors of production are labour, capital, land (natural resources), and entrepreneurship.

• Labour: Physical and mental work effort supplied by people. The price of labour is the wage rate, determined by supply and demand in competitive markets.

• Capital: Tools, machines, buildings, and other constructions produced in the past and used to produce goods and services. Capital goods are traded in goods markets, but capital services are traded in rental markets.

• Land (Natural Resources): All gifts of nature, such as land, oil, and minerals. The price for the use of land is a rental rate. Nonrenewable resources (e.g., oil, coal) are traded in global commodity markets.

• Entrepreneurship: The services of entrepreneurs are not traded in markets. Entrepreneurs receive profits or bear losses from their business decisions.

The Demand for a Factor of Production

Derived Demand and Value of Marginal Product

The demand for a factor of production is derived demand, meaning it is determined by the demand for the goods produced using that factor. Firms hire factors to maximize profit, and the value of hiring one more unit is called the value of marginal product (VMP).

• Value of Marginal Product (VMP): The additional revenue a firm earns by employing one more unit of a factor.

• Formula: $\text{VMP} = \text{Price of output} \times \text{Marginal product of the factor}$

• Example: If the price of coffee is $4 and the marginal product of labour is 6 coffees per hour, then$\text{VMP} = 4 \times 6 = 24$ dollars per worker.

Table: Calculation of Value of Marginal Product (VMP)

Quantity of Labour (L)	Total Product (TP)	Marginal Product (MP)	Value of Marginal Product (VMP)
0	0	-	-
1	7	7	28
2	13	6	24
3	18	5	20
4	22	4	16
5	25	3	12

Profit Maximization and Labour Demand

Firms maximize profit by hiring labour up to the point where the value of marginal product equals the wage rate.

• If $\text{VMP} > \text{wage rate}$, hire more workers.

• If $\text{VMP} < \text{wage rate}$, reduce the number of workers.

• Profit is maximized when $\text{VMP} = \text{wage rate}$.

Changes in Labour Demand

The firm's demand for labour can shift due to:

• Price of the firm's output: Higher output prices increase labour demand.

• Prices of other factors: If capital becomes cheaper, firms may substitute capital for labour, reducing labour demand.

• Technology: New technology can decrease demand for some types of labour but increase it for others (e.g., automation reduces demand for manual labour but increases demand for technical workers).

Labour Markets

Competitive Labour Market

In a competitive labour market, many firms demand labour and many households supply it. The market demand for labour is the sum of all firms' labour demand at each wage rate, and the market supply is the sum of all individuals' labour supply.

Labour Supply Decisions

• Individuals allocate time between leisure and labour based on the wage rate.

• Reservation wage: The lowest wage rate at which a person is willing to supply labour.

• As wage rises above the reservation wage, individuals supply more labour.

Individual Labour Supply Curve

• At low wage rates, the substitution effect dominates: higher wages increase labour supplied.

• At high wage rates, the income effect dominates: higher wages increase leisure and decrease labour supplied.

• The individual supply curve slopes upward at low wages but bends backward at high wages.

Market Supply Curve

• The market supply curve is the horizontal sum of individual supply curves.

• Despite backward bending of individual curves, the market supply curve generally slopes upward.

Labour Market Equilibrium

Equilibrium in the labour market determines the wage rate and the number of workers employed. The intersection of market demand and supply curves sets these values.

Differences and Trends in Wage Rates

• Wage rates tend to increase over time due to rising value of marginal product and technological change.

• Labour productivity increases demand for labour and average wage rates.

• Wage inequality has grown, with high wage rates rising faster than low wage rates.

Labour Unions and Market Power

• Labour union: An organized group aiming to increase wages and improve job conditions.

• Unions can raise wages by restricting labour supply or increasing demand for union-produced goods.

Monopsony in the Labour Market

A monopsony is a market with a single buyer of labour, such as a large employer in a small town. Monopsonies can set wage rates below competitive levels and employ fewer workers.

• Monopsony maximizes profit where marginal cost of labour (MCL) equals value of marginal product (VMP).

• Monopsony pays the lowest wage rate for which workers are willing to work.

Minimum Wage and Monopsony

• Imposing a minimum wage can increase employment in a monopsony by making the supply of labour perfectly elastic up to a certain quantity.

• Beyond that quantity, the supply curve resumes its normal upward slope.

Capital and Natural Resource Markets

Capital Rental Markets

Firms demand capital services based on the value of marginal product of capital. Profit-maximizing firms hire capital up to the point where VMP equals the rental rate.

• Rent-versus-buy decision: Firms compare the cost of renting capital versus buying and implicitly renting it (considering depreciation and interest).

Land Rental Market

• Demand for land is based on the value of marginal product of land.

• Firms rent land up to the point where VMP equals the rental rate.

Nonrenewable Natural Resource Markets

Resources like oil, gas, and coal are traded in global commodity markets. Prices and quantities are determined by demand and supply.

• Demand for oil: Influenced by VMP and expected future price. Demand curve slopes downward.

• Supply of oil: Influenced by known reserves, scale of production, and expected future price. Supply curve slopes upward due to increasing marginal cost.

• Speculation: Expectations about future prices can affect current demand and supply.

Hotelling Principle

• The price of a nonrenewable resource is expected to rise at a rate equal to the interest rate.

• If expected price rise exceeds the interest rate, it is profitable to hold inventory, increasing demand and reducing supply.

• If interest rate exceeds expected price rise, it is better to sell now, decreasing demand and increasing supply.

• Equilibrium occurs when expected price rise equals the interest rate.