How economies actually work

Start at the source — inflation, interest, the Fed, and the forces moving every dollar.

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What Is P/E Ratio?

Price-to-Earnings Ratio—the price of a stock divided by annual earnings per share. A key valuation metric.

5 min read · June 9, 2026Read more →

• What Is Core Inflation?
• What Is Inflation?
• What Is Short Selling?
• What Is the Consumer Price Index (CPI)?
• What Is the Federal Funds Rate?
• What does the Federal Reserve actually do?
• What Was the 2008 Financial Crisis?

The economic way of thinking — scarcity, prices, choice, and how markets coordinate.

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The Shortage Problem: When Demand Outruns Supply

A shortage occurs when quantity demanded at a given price exceeds quantity supplied. Free markets resolve shortages through rising prices; price ceilings lock…

3 min read · January 28, 2026Read more →

• The Substitution and Income Effects: A Framework for Decomposing Any Price Change
• Opportunity Cost: The Price of Every Decision You Make
• The Rational Actor: What Economics Assumes About You — and Where It's Right
• Price Elasticity of Supply: Why Markets Don't React Overnight
• Substitutes and Complements: How Related Goods Move Together
• The Substitution Effect and Income Effect: Two Reasons Demand Slopes Down
• Market Equilibrium: The Price That Clears the Market

How firms produce and compete — costs, market structures, labor, and the factors of production.

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The Entrepreneur as Economic Actor: Risk, Innovation, and the Theory of Profit

The entrepreneur is the factor of production economics struggled to place. Here is Schumpeter on innovation, Knight on uncertainty, and why they earn profit.

7 min read · April 28, 2026Read more →

• What Is an Oligopoly? The Market Structure Where Rivals Think About Each Other
• Deadweight Loss: The Economic Value That Disappears in Inefficient Markets
• What Is Perfect Competition? The Market Structure That Sets the Benchmark
• Barriers to Entry: What Keeps Competitors Out of Profitable Markets
• The Law of Diminishing Returns: Why Adding More Eventually Produces Less
• Marginal Revenue Product: What One More Worker Is Actually Worth
• Price Discrimination: Charging Different Buyers Different Prices for the Same Good

Where markets break and what to do about it — externalities, information, and government intervention.

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The Market for Lemons: How Bad Products Drive Out Good Ones

George Akerlof's Market for Lemons model shows how asymmetric information about quality can cause high-quality goods to be driven out of a market entirely,…

3 min read · May 4, 2026Read more →

• Adverse Selection: How Information Gaps Attract the Wrong Participants
• When Markets Get It Wrong: The Four Sources of Market Failure
• The Principal-Agent Problem: When Your Representative Has Different Interests
• Positive Externality: When Transactions Benefit People Who Didn't Pay
• The Market for Lemons: How Asymmetric Information Unravels Markets
• Moral Hazard: When Being Protected Changes How Carefully You Behave
• Common Resources: Rival But Non-Excludable

Economics in the wild — trade, inequality, and the markets that shape daily life.

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Poverty Line: Defining the Threshold Between Poor and Not Poor

The poverty line is the income threshold below which a household is classified as poor. The U.S.

4 min read · June 2, 2026Read more →

• Lorenz Curve: Visualizing Income Inequality
• Inside Non-Tariff Barriers: Quotas, Standards, and the Hidden Costs of Trade Protection
• Switching Costs: The Friction That Keeps Customers Locked In
• Environmental Economics: Pricing the Planet and the Policy Math Behind Climate Action
• Trade Doesn't Cost Jobs — It Moves Them. Here's the Evidence.
• The Network Effect: Why Some Products Become More Valuable as They Grow
• Trade Policy, Jobs, and the Political Economy of Protection