ECON 202 Ole Miss McGinness Final Actual Exam (2026/2027) — All Questions with Correct Detailed Answers | A-Graded with Expert Feedback | 100%Correct

ECON 202 Ole Miss McGinness Final Actual Exam (2026/2027) — All Questions with Correct Detailed Answers | A-Graded with Expert Feedback | 100%Correct Core Domains: Microeconomic Theory, Supply & Demand Analysis, Market Equilibrium, Elasticity Concepts, Consumer & Producer Behavior, Production & Cost Models, Perfect Competition & Market Structures, Monopoly & Oligopoly Analysis, Game Theory Applications, Labor Markets & Income Distribution, Externalities & Public Goods, Macroeconomic Indicators, Economic Growth & Stabilization Policies, and Applied Economic Reasoning Exam Structure The ECON 202 Ole Miss McGinness Final Exam for the 2026/2027 academic cycle is a comprehensive, 80-question assessment evaluating both microeconomic and macroeconomic reasoning. The exam includes multiple-choice items, graphical interpretations, scenario-based applications, and quantitative analysis designed to measure theoretical understanding and real-world problem-solving skills. This guide presents all verified study questions and detailed explanations aligned with the ECON 202 curriculum. Introduction This ECON 202 Ole Miss McGinness Final Exam guide for the 2026/2027 academic year provides the fully updated, expert-reviewed exam preparation resource containing correct answers with detailed explanations. It ensures strong mastery of foundational economic concepts, including supply and demand, market structures, elasticity, production theory, labor economics, and core macroeconomic indicators. Each explanation reinforces deeper economic intuition, graphical reasoning, and application of economic models—supporting academic success in Professor McGinness’s course and developing long-term analytical proficiency. Answer Format All correct economic principles, graphical solutions, and analytical interpretations are presented in yellow, accompanied by expert rationales that explain the underlying theory, equations, and real-world application of each concept. Each answer is supported with step-by-step reasoning consistent with upper-division economics standards and Professor McGinness’s emphasis on critical thinking and practical understanding. 1/11 2/11 What is economics? the study of choice under the condition of scarcity What is the difference between microeconomics and macroeconomics? MICROECONOMICS = the study of individual decision making by firms and individuals MACROECONOMICS = the study of aggregate behavior, including unemployment, inflation, recessions, and other economy-wide phenomenon What is opportunity cost? the forgone best alternative to any activity What is absolute advantage and comparative advantage? ABSOLUTE = ability to produce more with the same or more resources COMPARITIVE = ability to produce with less opportunity cost What is the difference between demand and quantity demanded? DEMAND = the relationship between quantity demanded and price QUANTITY DEMANDED = the number of units buyers are willing and able to purchase at a given price What is the Law of Demand? As the price rises, quantity demanded falls. There is a negative relationship between price and quantity demanded What happens to demand when price changes? If the price of the good increases, quantity demanded decreases. The Demand Curve does not shift when price changes!!! How do you find a market demand curve? summation of all the individual demand curves in a given market How does income/wealth affect demand curves for normal or inferior goods? Higher income = more purchases of normal goods Lower income = more purchases of inferior goods 3/11 How does a change in the price of a substitute affect the demand curve? When the price of a substitute good decreases, the quantity demanded for that good increases, but the demand for the good that it is being substituted for decreases How does a change in the price of a complement affect the demand curve? When the price of a good that complements a good decreases, then the quantity demanded of one increases and the demand for the other increases What are the determinants of demand? Income, price of related goods, preferences of buyers, future expectations of buyers, number of buyers What is the difference between supply and quantity supplied? Supply = The relationship between quantity supplied and price Quantity Supplied = The number of units sellers are willing and able to provide at a given price What is the Law of Supply? As the price rises, quantity supplied increases. There is a positive relationship between price and quantity supplied What happens to supply when price changes? If the price of the good increases, quantity supplied increases. The Supply Curve does not shift when price changes!!! How do you find a market supply curve? Adding together the individual supply curves of all firms in an economy How do the costs of production shift supply curves? Higher cost = less supply Lower cost = more supply How do changes in input prices and technology affect supply curves? If input prices are lower, production will cost less and more goods can be supplied. If technology is cheaper, production will cost less and more goods can be supplied. What are the determinants of supply? Costs of production, weather, price of alternative goods, future expectations of sellers, number of sellers 4/11 What is the equilibrium price? Equilibrium price is the market price where the quantity of goods supplied is equal to the quantity of goods demanded. What happens when the market price is below the equilibrium price? When the market price is below the equilibrium price, quantity supplied is less than quantity demanded, creating a shortage What happens when the market price is above the equilibrium price? When the market price is above the equilibrium price, quantity supplied is greater than quantity demanded, creating a surplus. What is a price ceiling? How do they affect markets? Price ceiling is the maximum price allowed by law. The market price cannot rise above the ceiling. When the ceiling is set below the market price, there will be excess demand or a supply shortage. When the ceiling is above market price, they cause no problems. What is a shortage? What happens during a shortage? A shortage is a situation in which the demand for a product or service exceeds its supply in a market. Producers won't produce as much at the lower price, while consumers will demand more because the goods are cheaper What is a price floor? How do they affect markets? A price floor is a government price control or limit on how low a price can be charged for a product, good, commodity, or service. When a price floor is set above the equilibrium price, quantity supplied will exceed quantity demanded, and excess supply or surpluses will result. What is the Consumer Surplus? The amount a buyer is willing to pay for a good minus the amount the buyer actually pays for it. A consumer surplus occurs when the consumer is willing to pay more for a given product than the current market price What is the Producer Surplus? The difference between the lowest price a firm would be willing to accept for a good or service and the price it actually receives 5/11 What does the height of the demand curve show? The height of the demand curve indicates the maximum amount the consumer is willing to pay What does the height of the Supply curve show? The height of the supply curve shows the minimum price at which producers are willing to supply various units of the good What is Price Elasticity of Demand? A measure of the responsiveness of quantity demanded to a change in price. (%Change in Qd / %Change in P) (Always negative due to Law of Demand) What do elastic and inelastic refer to? Price Elastic = sensitive to changes in price Price Inelastic = insensitive to changes in price What is total revenue? Price x Quantity How is price elasticity of demand related to total revenue? When demand is elastic, the relationship between TR and P is a negative correlation (P up, TR down). When demand is inelastic, the relationship between TR and P is a positive correlation (P up, TR up) What is the household's objective function or main goal? Maximize their total utility given their income, market prices, wage, and other market conditions. What is utility? A made-up measure of satisfaction What is Marginal Utility? The additional satisfaction from the last unit consumed What is the Law of Diminishing Marginal Utility? The additional satisfaction always falls with more consumption 6/11 What is the budget constraint? Show the maximum bundle of two goods that a household can afford What is the Utility Maximization Rule? How does it work? The Rule states that consumers decide to allocate their money incomes so that the last dollar spent on each product purchased yields the same amount of extra marginal utility What is the income effect? The income effect is the change in demand for a good or service caused by a change in a consumer's purchasing power resulting from a change in real income. What is the substitution effect? The decrease in sales for a product that can be attributed to consumers switching to cheaper alternatives when its price rises In terms of production, what is the difference between the long-run and the short-run? The main difference between long run and short run costs is that there are no fixed factors in the long run; there are both fixed and variable factors in the short run What is total product? Total output produced by the firm What is the marginal product of labor? The additional output produced from the last unit of labor employed What are Total Variable Cost and Total Fixed Cost? TVC = costs that vary with output. For example: labor and materials TFC = costs that do not vary with output. For example: debt maintenance, legal fees, accounting fees, property taxes, the opportunity cost of capital, etc What is Marginal Cost? The additional cost incurred in the production of one more unit of a good or service 7/11 What is the objective (or goal) for firms? Maximize profit What are the 3 characteristics of Perfect Competition? 1) There are many buyers and sellers, where not one buyer or seller can influence the market price. 2) Each firm produces standardized products, and each buyer values each firm's output the same. 3) Free entry and exit in the Long-Run. Firms are free to enter or exit the market. Where do all firms produce to maximize profit? Where its marginal revenue and marginal cost are equal Be able to find profit on a graph with the market price, MC, and ATC. When does a firm earn a profit? When do they earn a loss? Firm profits when TR TVC, P AVC Firms loses when TR TVC, P AVC What is the LRAC curve? Long-Run Average Cost Curve = an envelope that includes the lowest point on each possible short-run ATC curve What does Economies of Scale mean? Diseconomies of Scale? Economies of Scale = the firm increases in size and average cost falls Diseconomies of Scale = the firm increases in size and average cost rises In Resource Markets, who demands and who supplies? Firms demand and households supply What are the characteristics of a competitive labor market? -Firms value each worker relatively the same -Not one firm can influence the market price How do firms, regardless of the labor market structure, decide how many workers to hire? They hire the exact amount needed to maximize profit 8/11 What is MRPL? Marginal Revenue Product of Labor = the additional revenue generated from the last worker employed What is MFC? Marginal Factor Cost = the additional cost of employing another unit of the input How do you calculate a firm's MRPL? Change in Total Rrevenue / Change in Labor How do firms decide how many workers to hire? They hire the exact amount needed to maximize profit What is a firm's demand for labor? Because the MFCL = wage when the labor market is competitive, the downward sloping portion of MRPL is the firms demand for labor How do you find the market demand for labor? The Market Demand for Labor is the sum of each firms' Marginal Revenue Product of Labor curves In product markets, what is the socially efficient level of production characterized by? Where price = marginal cost What does price represent, to society? Price represents the value of the last unit consumed What does MC represent for society? Marginal Cost represents the opportunity cost of the resources used to produce the last unit If P MC, what does that mean for society? If P MC, the additional value to society from the last unit produced is greater than the opportunity cost of the additional resources used to produce it. Therefore, firms should be producing more of this good from Society's Point of View 9/11 If P MC, what does that mean for society? If P MC, the additional value to society from the last unit produced is less than the opportunity cost of the additional resources used to produce it. Therefore, firms should producing less of this good from Society's Point of View. What market structure results in the socially efficient level of production? Perfectly competitive output markets and competitive input markets provide the most value to society possible, given the labor, capital, and land available In labor markets, what is the socially efficient level of employment? A firm maximizes profit by employing labor where MRPL = PL What does MRPL represent to society? Marginal Revenue Product of an input represents the value created to society of the last unit of the input What does the market price of labor, PL, represent? The market price of the input represents the opportunity cost to society of employing the last unit of the input If MRPL PL, what does that mean to society? If MRPL PL, the additional value created to society from the last unit of labor is greater than the opportunity cost of employing that unit of labor. Therefore, the firm should be using more labor from Society's Point of View If MRPL PL, what does that mean to society? If MRPL PL, the additional value created to society from the last unit of labor is less than the opportunity cost of employing that unit of labor. Therefore, the firm should be using less labor from Society's Point of View What is market failure? When free markets fail to reach the optimal outcome to society Name the 4 sources of market failure. 1) Imperfect Competition 2) Externalities 3) Public Goods 4) Imperfect or Asymmetric Information 10/11 What are public goods? A commodity or service that is provided without profit to all members of a society, either by the government or a private individual or organization. What are positive externalities? Negative externalities? Positive externalities occur when the consumption or production of a good causes a benefit to a third party. A negative externality is a cost that is suffered by a third party as a consequence of an economic transaction Describe the market structure of Monopoly. What are barriers to entry? -Many buyers but only one seller. -The product has no close substitutes -Barriers to Entry in the Long-Run: legal barriers like patents, government monopolies, sole ownership of a key resource, network externalities, natural monopolies What decisions to Monopolies face in the short-run and long-run? Setting prices, how to protect barriers to entry Can and how does a Monopolist earn an economic profit in the long-run? They can by earning above a normal rate of profits in the short-run Do Monopolies produce the socially efficient level of production? Why, or why not? Because Monopolies set their own price, P MR. Therefore at the profit maximizing price and output, P MC. P MC is underproducing this good from society's point of view How is Monopolistic Competition different from Perfect Competition? The principal difference between these two is that in the case of perfect competition the firms are price takers, whereas in monopolistic competition the firms are price makers What is the shape of a Monopolistically Competitive firm's Marginal Revenue curve? A negative sloping straight line What is the long-run equilibrium in Monopolistically Competitive market? Describe the market structure of In the long run, a firm in a monopolistic competitive market will product the amount of goods where the long run marginal cost (LRMC) curve intersects marginal revenue (MR). The price will be set where the quantity produced falls on the average revenue (AR) curve Oligopoly is a market structure with a small number Oligopoly. What is the defining characteristic of oligopolies that make them different than other market structures? of firms, none of which can keep the others from having significant influence. Defining characteristic = the strategic interdependence of firms: each firms profit-maximizing price and output depends on the other firms' profit-maximizing price and output