Economics: Mastering Microeconomics 101

Explore the production possibilities frontier (PPF) to learn how economists think, compare two goods, and study opportunity costs, trade-offs, scarcity, and optimal locations.

Explore the production possibilities frontier, showing how a two-good economy allocates limited resources between power lines and wheat, revealing tradeoffs, full employment, and efficient versus inefficient allocations.

Explore how the production possibilities frontier illustrates opportunity costs, showing that moving resources to increase wheat raises costs in power lines due to the law of increasing opportunity costs.

Derive the marginal cost curve from the production possibilities frontier using one-unit output changes, average slopes, and the link to opportunity costs and increasing costs.

Explore marginal benefit and allocative efficiency, identifying how to choose the allocative efficient point on the production possibilities frontier by equating marginal cost and marginal benefit.

This lecture uses the production possibilities frontier to show how growth from productive resources or technology expands capacity, shifting from consumption today toward future production capacity and higher living standards.

Explore opportunity costs and scarcity through the production possibility frontier (PPF), analyzing tradeoffs between defense spending and civilian goods for governments and individuals.

Explore supply and demand by analyzing how consumers, firms, and governments create market demand. Build a model that integrates supply and demand to explain market prices and real-world trends.

Demand is the willingness, ability, and plan to purchase a good. Availability and income affect whether purchases occur, as individuals' decisions aggregate into market demand for sedans and oranges.

Derive an individual demand curve by plotting price against quantity demanded using a Dumond schedule, illustrating the law of demand and the substitution and income effects.

Derive market demand curves by horizontally adding the individual curves of Mike and Shelly to show how price changes affect total hours of clown services demanded per week.

Differentiate the shift in demand from a change in the quantity demanded on the coal demand curve; non-price factors like related goods, income, future prices, and preferences shift demand.

Discover how supply is what producers are willing and able to supply at a given price, with firms and institutions providing goods for sale and contributing to a market model.

Learn how a firm's supply curve is derived from a supply schedule by plotting price per kilogram against quantity supplied, highlighting diminishing marginal returns.

Aggregate individual supply curves to derive the market supply curve, adding quantities at the same price to reveal total output and how price levels drive production.

Understand how price changes move along the supply curve, while shifts reflect changes in productive resources, future prices, number of suppliers, or technology in coal markets.

Learn how to combine supply and demand on a single graph, identify the equilibrium price and quantity, and analyze shortages and surpluses in markets.

Discover how market mechanisms drive equilibrium through demand and supply curves, showing how demand and supply shocks alter price levels and quantities in coal and beyond.

Analyze rhino poaching through the supply and demand model, showing how curve shifts affect price and quantity, and conclude that reducing demand is the most effective solution.

Analyze consumer and producer surplus and dead weight loss to assess market efficiencies and the impact of government intervention, building on supply and demand, including triangle and rectangle area calculations.

Calculate consumer surplus by linking marginal benefit with the demand curve and analyzing price changes; use triangle area to quantify surplus under the demand curve above market price.

Explore how producer surplus arises from the supply curve, as market price exceeds production costs, and how to calculate it as the area between market price and the supply curve.

Using consumer and producer surplus, the lecture identifies market inefficiencies and shows how mb equals mc at equilibrium, yielding allocative efficiency.

Explore why markets deviate from efficiency due to information gaps, regulation, taxes, externalities, and governance failures, and analyze how price ceilings create dead weight loss and underproduction.

Compare competitive markets and monopoly scenarios using consumer surplus, producer surplus, and deadweight loss to assess market power and apply these concepts to real-world analysis.

Explore how consumer surplus, producer surplus, and deadweight loss reveal market power as you compare competitive markets to monopolies.

Calculate revenue by price times quantity in a supply and demand model. Explore how price shocks and shifts in supply or demand affect revenue using truffles and cigarettes.

Explore price elasticity of demand as a units-free measure of how quantity demanded responds to price changes, using percentage changes in quantity and price, and the concept of relative change.

Learn to interpret price elasticity of demand values and identify elastic, unit elastic, inelastic, perfectly elastic, and perfectly inelastic outcomes, using the formula and real-world revenue considerations.

Analyze how price elasticity of demand varies along a downward sloping straight line demand curve and shapes total revenue. Mark elastic, unit elastic, and inelastic regions and revenue impact.

Explore how elasticity of demand responds to three factors: substitutes, income share, and time. See how price changes, such as electricity, shape consumer choices and market sensitivity.

Discover how pasta sauce demand responds to pasta price changes, teaching cross price elasticity of demand, with substitutes yielding positive and complements negative elasticity.

Explore how income changes affect demand by calculating the income elasticity of demand, distinguishing normal and inferior goods, and interpreting the sign and magnitude.

Explore how a bumper crop increases supply, lowers market prices, and can reduce farmer revenue, unless open markets or exports offset losses in profits and revenues.

Explore how a consumer's budget and relative prices among goods, including substitutes and complements, shape choices and maximize utility through simple straight-line graphs.

Nelson's budget line shows how income and prices constrain two goods—vegetables and chocolate—as a downward-sloping line, defining affordable combinations and that income equals expenditure.

Construct and interpret Nelson's budget line from income and prices of chocolates and vegetables, using intercepts and the line equation to show affordable versus unaffordable combinations.

Learn why the budget line slopes downward with a negative slope, enforcing trade-offs as income is spent, and how prices determine the relative price of vegetables and chocolate.

Discover how changes in price and income shift the budget line, rotate its slope, and alter intercepts to change affordable combinations and identify the maximizing consumption point.

Explore how indifference curves represent consumer preferences and utility, showing that more and mixed bundles are preferred; pair these curves with the budget line to find the preferred affordable bundle.

Illustrate how a police budget of tear gas and barbed wire maps consumer preferences with indifference curves, showing noncrossing curves and higher preference maps imply greater satisfaction.

Explore how indifference curves are not straight lines, revealing consumer preference for a mix of goods and a varying marginal rate of substitution through rise over run.

Analyze how the budget line and indifference curves identify affordable and most preferred bundles of tear gas and barbed wire, with marginal rate of substitution equal to the budget slope.

A price drop in barb wire shifts the budget line outward, revealing a new tangency point that increases consumption of barb wire and tear gas, illustrating income and substitution effects.

Explore how price changes split and isolate the substitution and income effects using budget lines and indifference curves.

Learn how to decompose price changes into substitution and income effects using a hypothetical budget line, old indifference curves, and parallel budget shifts.

Explain how substitution and income effects influence quantity demanded along budget lines and indifference curves. Identify normal versus inferior goods and how income changes shift consumption.

Explore how individuals weigh incomes against what they can afford across multiple goods, using budget lines and indifference curves to identify allocatively efficient choices that maximize satisfaction.

Explore how firms decide output, price, and cost while analyzing short-run and long-run production costs and output curves. Examine when to increase capacity and how inputs influence production decisions.

Explore how firms adjust output in the short run by changing labor and inputs while fixed capital remains, and introduce total product, marginal product, and average product curves.

Draw the total product curve to show how labor affects coal output in the short run, with marginal product of labor changing as fixed capital limits growth.

Explore how the marginal product of labor shapes the total product curve in the short run, showing how the marginal product rises then falls as more labor uses fixed capital.

Explore how to calculate average product as total product divided by labor, compare it with the marginal product curve, and show how their relationship determines the average product curve.

Explore the cost side of production by distinguishing fixed costs from variable costs, noting labor as variable and rent as fixed, and review short-run marginal and average cost curves.

Link labor cost to output by plotting variable cost against output, deriving the short-run variable cost curve from a constant $15 per hour and the marginal product of labor.

Explore how fixed costs stay constant while variable costs rise with the marginal product of labor, summing to total cost for coal-mine production decisions.

Calculate average costs by dividing fixed and variable costs by output, plot afc, avc, atc; observe afc falls with output, avc falls then rises, atc converges toward avc.

Explore how marginal cost relates to average total cost as output changes, noting that marginal cost falls with productive labor and rises with diminishing marginal product.

Analyze how short-run labor turns into output and costs, linking marginal product and average product to marginal cost and average total cost as fixed capital shapes production.

Learn how adjusting fixed capital in the long run shifts short-run cost curves, creates the long-run average total cost curve, and reveals economies of scale and the optimal ATC point.

Explore the economies of scale in mining, outlining how long-run and short-run production affect costs, fixed capital, and labor decisions amid price fluctuations.

Identify the four defining traits of a perfectly competitive market: many firms, easy entry, well-known prices, and highly similar goods, with real-world examples from potatoes to bottled water.

Explore how a perfectly competitive market features price takers, with price set by supply and demand and marginal revenue equal to the market price for each firm.

Explore total revenue and total costs in a perfectly competitive market to determine profit across output levels, showing how price, costs, and diminishing returns shape economic profit.

Explore how firms maximize short-run profits in perfect competition by comparing marginal revenue to marginal cost. Learn to produce where marginal revenue equals marginal cost to optimize each additional unit.

Introduce the average total cost curve into a perfectly competitive market and explain three scenarios where marginal revenue equals marginal cost, yielding break-even, economic profit, or economic loss.

Link the short-run supply of an individual firm in a perfectly competitive market to its marginal cost above the average variable cost, driven by MR = MC and shutdown decisions.

Learn how the short-run individual firm supply curves sum horizontally to form the industry supply curve in a perfectly competitive market, considering minimum average variable cost and fixed capital.

In a short-run perfectly competitive market, supply and demand set price and quantity. A horizontal shutdown line at minimum average variable cost guides firm decisions as demand shifts toward equilibrium.

Explore how introducing new capital shifts short-run cost curves. See how the long-run average cost curve falls, enabling profits when marginal revenue exceeds it in a perfectly competitive market.

The lecture analyzes how a decrease in market demand reshapes a perfectly competitive industry, causing a short-run surplus, price and output adjustments, firm exits, and a new long-run equilibrium.

An increase in demand shifts the demand curve right, raising price and output in the short run. New firms enter to restore long-run equilibrium at the minimum long-run average cost.