Competition & Monopoly
Perfect competition and monopoly — pricing, profit, and deadweight loss.
24 articles
FeaturedAntitrust: The Policy Lever for Protecting Competition
Antitrust law prevents firms from monopolizing markets, fixing prices, or merging in ways that substantially reduce competition.
Read more →Deep Dives
10 articles
What Is Perfect Competition? The Market Structure That Sets the Benchmark
An idealized market of countless tiny sellers, an identical product, and zero pricing power. It rarely exists in full, yet it anchors all of economics.
Revenue and Profit for a Competitive Firm: When Price Is Out of Your Hands
When you can't set your price, revenue math gets simpler and profit gets brutal. Here's how a price-taker earns, breaks even, or bleeds — with real numbers.
The MR = MC Rule: How Firms Find the Profit-Maximizing Output
Firms maximize profit where marginal revenue equals marginal cost. Here's what that means, why it's always true, and how to apply it step by step.
Should You Shut Down or Exit? The Economics of When to Stop Producing
Losing money doesn't always mean stop. Economics splits idling temporarily from leaving for good — and the deciding number isn't the one most people watch.
Why Competition Drives Economic Profits to Zero — and What That Tells Investors
It sounds like doom: competition pushes profit to zero. The reality is subtler, the math reassuring, and the takeaway reshapes how you judge any business.
How Monopolies Form and Survive: The Economics of Market Control
Monopolies aren't born from being biggest — they're built and defended by barriers that keep rivals out. The main ways control forms, and how it's policed.
Monopoly Pricing: Why Less Output Always Means Higher Prices
A monopolist sets price by holding back output. The numbers behind why a sole seller produces less and charges more than a competitive market would.
Deadweight Loss: The Hidden Cost of Monopoly That Never Shows Up on a Balance Sheet
Deadweight loss is value that simply vanishes when a monopoly restricts output — trades that would benefit everyone but never happen. Here is how to see it.
Price Discrimination: How Sellers Charge Different Buyers Different Prices for the Same Good
Student discounts, airline fares, and bulk pricing are the same trick: charging different buyers different prices for one good. The three degrees, explained.
Natural Monopoly and Regulation: Should You Let One Firm Win — or Control What It Charges?
Some markets are cheapest served by one firm — water, power lines, pipelines. The hard question isn't whether to allow the monopoly, but how to keep it honest.
Quick Answers
13 termsMarginal Revenue: The Revenue From One More Sale
Marginal revenue is the additional revenue earned from selling one more unit of output. Its relationship with price determines the firm's market power and its…
Read more →Long-Run Equilibrium: Where Competition Eventually Takes Every Market
Long-run equilibrium is the state a competitive market reaches after all entry and exit adjustments are complete.
Read more →Natural Monopoly: When One Firm Really Can Do It Cheaper
A natural monopoly exists when one firm can supply the entire market at lower cost than two or more competing firms.
Read more →The Profit-Maximization Rule: Why Every Firm Targets MR = MC
The profit-maximization rule states that firms maximize profit by producing where marginal revenue equals marginal cost.
Read more →Monopoly: When One Seller Controls the Market
A monopoly is a market with a single seller who faces no close substitutes and sets price above marginal cost.
Read more →Allocative vs. Productive Efficiency: Two Ways Markets Can Get It Right
Allocative efficiency means resources go to their highest-valued uses (P = MC). Productive efficiency means goods are produced at minimum cost.
Read more →Price Discrimination: Charging Different Buyers Different Prices for the Same Good
Price discrimination occurs when a seller charges different prices to different buyers for the same good based on their willingness to pay.
Read more →Market Power: The Ability to Price Above the Competition
Market power is the ability of a firm to profitably set price above marginal cost. It is the defining feature of monopoly and oligopoly — and the primary…
Read more →Deadweight Loss: The Economic Value That Disappears in Inefficient Markets
Deadweight loss is the reduction in total economic surplus from market inefficiency — units where the benefit to buyers exceeds the cost to sellers that go…
Read more →Barriers to Entry: What Keeps Competitors Out of Profitable Markets
Barriers to entry are factors that prevent new competitors from entering a profitable market.
Read more →Perfect Competition: The Market Structure That Maximizes Efficiency
Perfect competition is a market structure with many sellers, identical products, free entry and exit, and full information.
Read more →The Shutdown Condition: When Stopping Is Smarter Than Continuing
The shutdown condition tells a firm when it loses less money by halting production than by continuing.
Read more →Producer Surplus: The Value Sellers Capture Beyond Their Minimum Price
Producer surplus is the difference between the price a seller receives and the minimum price they would have accepted.
Read more →