Summary
Highlights
This section covers fundamental concepts like scarcity, factors of production (land, labor, capital, entrepreneurship), and economic systems (market-based vs. command economies). It also introduces opportunity cost, shown through the production possibilities curve (PPC), explaining constant vs. increasing opportunity costs, productive efficiency, and economic growth. Comparative and absolute advantage are discussed, along with the 'other over' and 'it over' formulas for calculating opportunity costs in output and input problems, respectively. The concept of mutually beneficial terms of trade is also explained.
Marginal analysis emphasizes that 'marginal' means change. Benefit-maximizing behavior occurs when marginal benefit equals marginal cost. For consumers, utility-maximizing combinations are achieved when the marginal utility of good A divided by its price equals the marginal utility of good B divided by its price.
The law of demand and law of supply are introduced, explaining their respective curves and the difference between a change in quantity demanded/supplied and a change in demand/supply. Key demand shifters (tastes, market size, related goods, income, expectations) and supply shifters (input prices, government tools, number of sellers, technology, other goods, producer expectations) are detailed. This section also covers price elasticity of demand (inelastic vs. elastic), the total revenue test, and elasticity coefficients. Income elasticity and cross-price elasticity for normal/inferior goods and substitutes/complements are also reviewed.
Market equilibrium, where quantity demanded equals quantity supplied, is explained, detailing how surpluses and shortages push prices towards equilibrium. The impact of shifts in supply and demand on equilibrium price and quantity, including double shifts, is discussed. Consumer and producer surplus are defined, and deadweight loss is introduced as a measure of inefficiency when equilibrium is not reached. The effects of binding price ceilings, price floors, and per-unit taxes on market outcomes, including tax incidence and government revenue, are also covered. The section concludes with an overview of international trade, tariffs, and their effects on domestic markets.
This unit introduces the law of diminishing marginal returns, explaining the relationship between labor input and output. Different cost curves are explored, including fixed costs, variable costs, total costs, marginal cost, average variable cost, and average total cost. The impact of changes in fixed and variable costs on these curves is discussed. Long-run average total cost curves are examined to explain economies of scale, constant returns to scale, and diseconomies of scale. The distinction between accounting profit and economic profit is made, emphasizing the importance of implicit costs. Finally, profit-maximizing behavior (MR=MC) and the characteristics of perfectly competitive markets are detailed, including long-run equilibrium, entry/exit of firms, and the shut-down rule.
This unit covers monopolies, monopolistic competition, and oligopolies. It highlights that imperfectly competitive firms have downward-sloping demand curves and marginal revenue curves below demand. Monopolies are characterized by one seller, high barriers to entry, unique goods, and price-seeking behavior, showing their profit, break-even, and loss scenarios, and contrasting them with perfectly competitive markets. Price discrimination by monopolies is also discussed. Monopolistic competition involves many sellers, low barriers, and differentiated products, with firms breaking even in the long run. Oligopolies, defined by few sellers and high barriers, are analyzed using game theory, including payoff matrices, dominant strategies, collusion, and Nash equilibrium.
This section explains the three key factors of production (land, labor, capital) and their respective payments. The demand for labor is derived from the marginal revenue product of labor, while the supply of labor comes from households. Factors that shift the demand and supply for labor are discussed. The perfect competitive factor market determines equilibrium wage and quantity of labor. Monopsony, a market with one buyer of labor, is introduced, showing how it leads to lower wages and employment than a competitive market. The least-cost combination of labor and capital formula is also presented.
Market failures occur when markets are not socially efficient, leading to deadweight loss. Externalities (positive and negative, in production and consumption) are identified as key market failures, demonstrating how they cause over or under-production. Government interventions like per-unit taxes (to correct negative externalities) and per-unit subsidies (to correct positive externalities) are explained. Different types of goods (rival/non-rival, excludable/non-excludable) are classified, with a focus on public goods and the free-rider problem. Finally, government controls on firms, including lump-sum taxes/subsidies, per-unit taxes/subsidies, and regulation of natural monopolies (allocatively efficient vs. fair-return price ceilings), are reviewed. The Lorenz curve and Gini coefficient are introduced to analyze income distribution, and tax classifications (regressive, progressive, proportional) are explained.