◆ THE ECONOMY
Firms & Markets
How firms produce and compete — costs, market structures, labor, and the factors of production.
82 articles
◆ THE COVER STORYThe Prisoner's Dilemma: Why Rational Rivals End Up Worse Off TogetherIn the prisoner's dilemma, two players each make the rational choice and both end up worse off. Here's the logic, the math, and why it matters.Read the breakdown →Deep Dives
◆ IMPERFECT COMPETITION
Nash Equilibrium: How Strategic Thinking Changed the Way Economists Model Markets
A Nash equilibrium is a stable point where no player can do better by changing strategy alone.
◆ THE FIRM & PRODUCTION
Marginal Product of Labor: The Number Behind Every Hiring Decision
One more worker, one real number: learn how marginal product of labor tells a firm exactly when to hire, when to stop, and what a worker is actually worth.
◆ COMPETITION & MONOPOLY
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.
◆ THE FIRM & PRODUCTION
What Happens When a Company Doubles in Size? Economies and Diseconomies of Scale
Growing bigger can make every unit cheaper — until it doesn't. Economies of scale pull costs down as a firm expands; diseconomies push them back up.
◆ THE FIRM & PRODUCTION
Short Run, Long Run: Why the Same Firm Acts Completely Differently Over Time
One question unlocks how any firm responds to a demand shock: which inputs can it actually change right now? The answer is never the same twice.
◆ IMPERFECT COMPETITION
Short-Run Profit, Long-Run Erosion: What Happens When Rivals Enter Your Market
In monopolistic competition, profit attracts entry, and entry competes the profit away. Follow the chain from a hot launch to the day profit hits zero.
◆ IMPERFECT COMPETITION
Cartels, Collusion, and Why Every Price-Fixing Scheme Eventually Breaks Down
Cartels fix prices to act like a monopoly, but each member gains by cheating. Most unravel from within. Here is how the economics actually work.
◆ LABOR ECONOMICS
What Determines Your Wage: Productivity, Scarcity, and the MRP Framework
Your wage is not set by what you need or deserve. It tracks marginal revenue product — what one more hour of work adds to employer revenue. Here is the math.
◆ COMPETITION & MONOPOLY
How a Monopolist Sets Its Price: Less Output, Higher Cost
A monopolist raises prices by producing less, not by charging more for the same output. Here is the arithmetic behind why.
Quick Answers
What Is an Oligopoly? The Market Structure Where Rivals Think About Each Other
An oligopoly is a market run by a handful of large firms whose decisions are tangled together.
Read more →Marginal 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 →The Prisoner's Dilemma: Why Rational Choices Produce Bad Outcomes
The Prisoner's Dilemma is a game in which two rational players each choose a dominant strategy that makes both worse off than if they had cooperated.
Read more →Derived Demand: Why Labor Demand Is Always Second-Hand
Derived demand is demand for an input that exists only because of demand for the output it helps produce.
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 →Explicit vs. Implicit Costs: The Full Picture of What a Business Really Costs
Explicit costs are the cash payments a firm makes; implicit costs are the opportunity costs of resources the firm owns.
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 Short Run vs. Long Run: The Most Important Time Distinction in Economics
The short run is the period when at least one input is fixed. The long run is when all inputs are variable.
Read more →Minimum Wage: The Wage Floor and Its Effects
The minimum wage is a legally mandated floor on wages that employers must pay workers. It protects workers from poverty wages but may reduce employment in…
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