Efficiency and Equity - Key Topics (Vocabulary Flashcards)

Resource Allocation Methods

  • Scarce resources can be allocated by several methods, each with its own pros, cons, and typical contexts.

  • Major methods listed in the transcript:

    • Market Price

    • Command

    • Majority Rule

    • Contest

    • First-Come, First-Served

    • Lottery

    • Personal Characteristics

    • Force

  • How each method works is illustrated with examples in the slides.

Market Price

  • Allocation mechanism: resources go to those willing to pay the market price.

  • Real-world pattern: you sell labor in a market and buy most things in markets.

  • Evaluation: for most goods and services, the market tends to do a good job at allocation.

Command

  • Allocation mechanism: resources allocated by the order of someone in authority.

  • Example: in a job, supervision determines what you do; labor time is allocated by command.

  • Evaluation: works well in organizations with clear lines of authority but poorly in a whole economy.

Majority Rule

  • Allocation mechanism: resources allocated according to the choice of the majority of voters.

  • Uses: tax rates between private and public use; how tax dollars are allocated among competing uses like defense and health care.

  • Evaluation: works well when the decision affects many people and self-interest must be suppressed to use resources efficiently.

Contest

  • Allocation mechanism: resources go to a winner (or group of winners).

  • Examples: sporting events are obvious contests; contests occur in other arenas as well.

  • Evaluation: effective when the players’ efforts are hard to monitor and reward directly.

First-Come, First-Served

  • Allocation mechanism: resources go to those who are first in line.

  • Examples: casual restaurants allocating tables; supermarkets at checkout.

  • Evaluation: works best when scarce resources can serve only one person at a time in a sequence.

Lottery

  • Allocation mechanism: resources go to those with winning numbers or lucky draws.

  • Examples: air-traffic landing slots, casinos, state lotteries.

  • Evaluation: effective when there is no good way to distinguish among potential users of a scarce resource.

Personal Characteristics

  • Allocation mechanism: resources allocated to those with the “right” characteristics (e.g., marriage partner selection).

  • Ethical concern: can lead to discrimination (e.g., best jobs going to a particular group).

Force

  • Allocation mechanism: force plays a role in resource allocation.

  • Examples: war; theft (taking property without consent).

Demand, Willingness to Pay, and Value

  • Value vs. price: value is what we get; price is what we pay.

  • The value of one more unit (marginal unit) is its marginal benefit (MB).

  • Willingness to pay (WTP) determines demand: demand = MB as a function of quantity.

  • A demand curve is a marginal benefit curve: it shows MB for each additional unit.

  • Individual vs. market demand:

    • Individual demand: relationship between price and quantity demanded by one person.

    • Market demand: relationship between price and quantity demanded by all buyers in the market.

  • Example: two buyers, Lisa and Nick, in the pizza market.

    • At $1 per slice: Lisa demands 30 slices; Nick demands 10 slices; total market demand = 40 slices.

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

Benefit, Cost, and Surplus

  • Consumer surplus (CS): the excess of the benefit received from a good over the amount paid for it.

  • Calculation: CS can be expressed as the marginal benefit minus price, summed over the quantity bought; equivalently, the area under the demand curve above the price, up to the quantity bought.

  • Producer surplus (PS): the excess of the amount received from selling a good over the cost of producing it.

  • Calculation: PS is the price received minus the minimum-supply price (marginal cost), summed over the quantity sold; on a graph, PS is the area below the market price and above the supply curve, summed over the quantity sold.

  • Relationship to market efficiency: total surplus TS = CS + PS; efficiency is achieved when TS is maximized.

Consumer Surplus (Illustrative Pizza Market at $1)

  • At a market price of $1 per slice:

    • Lisa pays $30 for 30 slices; her 10th slice is valued at $2, so CS from the 10th slice is $2 - $1 = $1.

    • Lisa’s total CS from 30 slices is the area under her individual demand curve above $1, up to 30 slices (represented as the green triangle in the slide).

    • Nick buys 10 slices; his CS is the area under his demand curve above $1 for 10 slices (also a green area).

  • The economy-wide CS is the sum of individual CS, i.e., the green area under the market demand curve above the price, for all slices bought (40 slices in total here).

  • Expenditure at $1 per slice: Lisa spends $30; Nick spends $10; total expenditure = $40.

Supply and Marginal Cost

  • Firms aim for profit: to profit from selling output, price must exceed production cost.

  • Distinction: cost vs. price.

  • Marginal cost (MC): the cost of producing one more unit; the minimum price a firm is willing to accept.

  • A supply curve is a marginal cost curve.

Individual and Market Supply

  • Individual supply: relationship between price and quantity supplied by one producer.

  • Market supply: relationship between price and quantity supplied by all producers in the market.

  • Example: Maria and Max are pizza producers. At $15 per pizza:

    • Maria supplies 100 pizzas; Max supplies 50 pizzas; total market supply = 150 pizzas.

Producer Surplus

  • Producer surplus (PS): the excess of the amount received from selling a good over the cost of producing it.

  • Calculation: PS = price received − minimum-supply price (MC), summed over the quantity sold; on a graph, PS is the area below the market price and above the supply curve, summed over the quantity sold.

  • At $15 per pizza:

    • Maria’s PS is the area of the blue triangle corresponding to the 100 pizzas she sells.

    • Max’s PS is the area of the blue triangle corresponding to the 50 pizzas he sells.

  • Combined PS for the economy is the area under the market price above the market supply curve, summed over all pizzas sold (150).

  • The red areas in the slide represent the costs of producing the pizzas; PS is the value of the pizzas sold in excess of production costs.

Efficiency of Competitive Equilibrium

  • A competitive market typically allocates resources efficiently at equilibrium, where quantity demanded equals quantity supplied.

  • Efficiency condition: MSB = MSC at the efficient quantity.

  • If production is below the efficient quantity, MSB > MSC (underproduction).

  • If production is above the efficient quantity, MSC > MSB (overproduction).

  • When the efficient quantity is produced, total surplus (CS + PS) is maximized.

The Invisible Hand

  • Adam Smith’s idea: markets coordinate resources to their highest-valued use through self-interested actions.

  • Consumers and producers interact in markets; the aggregate outcome tends to be efficient under competitive conditions.

Market Failure

  • Markets do not always yield efficient outcomes; market failure occurs when there is an inefficient outcome.

  • Market failures can arise from underproduction or overproduction:

    • Underproduction: too little of an item is produced.

    • Overproduction: too much of an item is produced.

Under- and Overproduction Examples (Pizza Market)

  • Underproduction scenario: efficient quantity is 10,000 pizzas/day; production is limited to 5,000 pizzas/day.

    • Result: underproduction; a deadweight loss (DWL) equals the area of the gray triangle, representing the decrease in total surplus.

  • Overproduction scenario: efficient quantity is 10,000 pizzas/day; production expands to 15,000 pizzas/day.

    • Result: overproduction; a deadweight loss arises from the excess production, also represented by a DWL triangle.

Sources of Market Failure

In competitive markets, underproduction or overproduction can arise from several sources:

  • Price and quantity regulations

  • Taxes and subsidies

  • Externalities

  • Public goods and common resources

  • Monopoly

  • High transaction costs

Price and Quantity Regulations

  • Price regulations can prevent price adjustments and lead to underproduction.

  • Quantity regulations (caps) on production can also lead to underproduction.

Taxes and Subsidies

  • Taxes raise buyer prices and lower seller revenues, reducing quantity produced (underproduction).

  • Subsidies lower buyer prices and raise seller revenues, increasing quantity produced (overproduction).

Externalities

  • An externality is a cost or benefit affecting someone other than the seller or buyer.

  • Example: an electric utility burning coal creates an external cost (acid rain).

  • Externalities can be negative or positive; the slide focuses on costs to third parties for negative externalities.

Public Goods and Common Resources

  • Public goods: benefits everyone, but non-excludable; free-rider problem leads to underproduction.

  • Common resources: owned by no one but usable by all; individual self-interest can ignore costs, leading to the tragedy of the commons and overuse (overproduction).

Monopoly

  • A monopoly is a single seller of a good or service.

  • Self-interest of the monopoly is to maximize profit, which leads to setting a price that yields less output than the social optimum (underproduction).

High Transactions Costs

  • Transactions costs are the opportunity costs of making trades in a market.

  • When these costs are high, some trades don’t occur, potentially leading to underproduction.

Key Takeaways

  • Efficient allocation in a competitive market occurs when MSB = MSC and total surplus is maximized.

  • Market failures can arise from government interventions (price/quantity regs,Taxes/Subsidies) and from market imperfections (externalities, public goods, common resources, monopoly, high transaction costs).

  • Surpluses (consumer and producer) provide a framework to measure welfare and understand how changes in price, quantity, or policies affect overall social welfare.

  • Real-world policy design often seeks to correct DWLs via targeted interventions that align private incentives with social efficiency (e.g., taxes, subsidies, regulation, provision of public goods, or property rights to address externalities).