The library
414 articles across Financial Literacy and Economic Intelligence — shuffled fresh each visit.
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.
- Derived demand is the demand for a factor of production that arises indirectly from consumer demand for the final good the factor helps produce
- When demand for a final good rises, demand for all inputs used to produce it rises — and vice versa
- The elasticity of derived demand depends on: the elasticity of demand for the final product, the substitutability of the input, and the input's share of total production cost
Price Elasticity of Demand: Measuring How Much Buyers Actually Care About Price
PED measures how much quantity falls when price rises. Learn the formula, the midpoint method, what drives elasticity, and why it determines every pricing and…
Law of Supply: Why Higher Prices Bring More Sellers to Market
The law of supply states that, all else equal, as price rises producers are willing to supply more.
Price Signal: How Markets Communicate Without Anyone in Charge
A price signal is the information a price conveys to buyers and sellers about relative scarcity, value, and opportunity.
The Law of Demand: Why Price and Quantity Move in Opposite Directions
The law of demand states that as price rises, quantity demanded falls — and the reasons behind that relationship are more interesting than the rule itself.
Price Elasticity of Supply: Why Markets Don't React Overnight
PES measures how quickly producers can raise output when prices rise. Time horizon is the dominant factor — and housing and oil show exactly why it matters.
Tax Incidence: Who Actually Pays the Tax?
Tax incidence describes the economic burden of a tax — who actually bears the cost, which may differ from who is legally required to pay it.
Income Elasticity and Cross-Price Elasticity: What Your Spending Reveals About Demand
YED and XED measure how demand shifts when income or a related good's price changes — with real data on food, luxury goods, and substitutes.
Substitutes and Complements: How Related Goods Move Together
Substitutes can replace each other — a price rise in one increases demand for the other. Complements are used together — a price rise in one decreases demand…
Income Elasticity of Demand: What Happens to Sales When Incomes Rise
Income elasticity of demand measures how much quantity demanded changes when consumer income changes.
What Happens When You Cap Prices Below Equilibrium: Rent Control and Shortages
A price cap below the market-clearing price doesn't make a good cheaper for everyone — it creates a shortage. Rent control is the textbook case.
What Actually Shifts Supply and Demand (And What Doesn't)
Five factors shift demand, five shift supply. Learn what actually moves entire curves — versus what simply moves quantity along them.
Price Ceiling: What Happens When Government Caps What Sellers Can Charge
A price ceiling is a legal maximum price below the market equilibrium. It protects buyers from high prices but creates shortages, non-price rationing, and…
Surplus: When Supply Exceeds Demand and What Happens Next
A surplus occurs when the quantity supplied at a given price exceeds the quantity demanded.
How Elasticity Drives Pricing Decisions, Tax Policy, and Who Actually Pays
Elasticity determines whether a price increase raises or destroys revenue, which side of a market bears a tax, and how large the economic cost of that tax…
Elastic vs. Inelastic Demand: Two Markets, One Price Hike, Opposite Outcomes
Same price hike, opposite revenue results. Learn how elastic and inelastic demand differ, which real goods land on each side, and why every pricing and tax…
How Markets Find Their Price: Solving for Equilibrium
Where supply meets demand: step-by-step equilibrium math, a surplus/shortage table, and comparative statics showing exactly how curve shifts move price and…