--- title: "Economics" description: "28 topics in Civics & Economics, in the order they build on each other." canonical: https://lightmysky.com/learn/civics-and-economics/areas/economics source: https://lightmysky.com/learn/civics-and-economics/areas/economics.md retrieved: 2026-10-19 --- > **Agent view.** This is the Markdown twin of the page, for tools and assistants. > When to use this site, and the call that answers each job: https://lightmysky.com/agent-instructions.md > API description (OpenAPI 3.1): https://lightmysky.com/openapi.json · Authentication: https://lightmysky.com/auth.md > Pricing: https://lightmysky.com/pricing.md · Catalog: https://lightmysky.com/llms.txt · Full catalog: https://lightmysky.com/llms-full.txt > Every machine-readable file on this domain: https://lightmysky.com/.well-known/ai-catalog.json > Ask for Markdown with `Accept: text/markdown`, a `.md` address, or `?mode=agent`. # Economics 28 topics in Civics & Economics, in the order they build on each other. Page: https://lightmysky.com/learn/civics-and-economics/areas/economics - [Where Things Come From](https://lightmysky.com/learn/civics-and-economics/where-things-come-from-mt_9v5-1k236E): Some things are made or grown nearby and others come from far away; bananas, toys and clothes travel by ship, truck and plane; places trade with each other because no place can make everything it needs - [Incentives and Choices](https://lightmysky.com/learn/civics-and-economics/incentives-and-choices-mt_KxkoDkbjPy): Rewards and penalties steer choices: sales, pocket-money deals, prizes, fines and late fees all change what people do; spotting the incentive behind a choice, including who set it up and why - [Productivity, Skills and Tools](https://lightmysky.com/learn/civics-and-economics/productivity-skills-and-tools-mt_q9wqRR_1Vk): Why some work produces more: better tools and machines (capital goods) and better-trained people (human capital); how learning a skill raises what a person can earn, and how rising productivity lifts living standards - [Externalities and Spillovers](https://lightmysky.com/learn/civics-and-economics/externalities-and-spillovers-mt_F4SQsGpZk9): Choices spill over onto people who had no say: a factory's smoke, a neighbour's loud music, a planted garden, a vaccination; why harmful spillovers get overproduced and helpful ones underproduced when nobody pays or is paid for them - [How Markets Work](https://lightmysky.com/learn/civics-and-economics/how-markets-work-mt_IWiQW8Sq2R): Buyers and sellers meet in markets for products, work and money; competition pushes prices and wages up or down; supply and demand shifts explain shortages, sales and price spikes; firms, non-profits and unions each play a part - [Money, Banking and Interest Rates](https://lightmysky.com/learn/civics-and-economics/money-banking-and-interest-rates-mt__aqBHw2wZM): Why money beats barter: it makes trading fast and lets value be stored and compared; how banks connect savers and borrowers, and how a change in interest rates ripples out to loans, savings, spending and big purchases - [Inflation, Unemployment and Growth](https://lightmysky.com/learn/civics-and-economics/inflation-unemployment-and-growth-mt_Zr0YyQwtKy): Reading an economy's vital signs: inflation as rising prices, unemployment as people seeking work, growth as more being produced; who gains and who is hurt when prices climb or fall or jobs disappear - [Scarcity, Opportunity Cost and the Production Frontier](https://lightmysky.com/learn/civics-and-economics/scarcity-opportunity-cost-and-the-production-frontier-mt_p_c7nNzHEw): Wants run ahead of what the available time, money and land can make, so every choice gives up the next best use of the same resources. A production frontier draws that trade-off for a whole economy: points inside waste resources, points outside are out of reach, and moving along the curve costs some of the other good. - [Trade Policy and Barriers](https://lightmysky.com/learn/civics-and-economics/trade-policy-and-barriers-mt_l_l6qXfRle): Governments shape trade with tariffs, quotas and rules; a tariff can protect local factories yet raise prices for everyone; weighing who wins and who loses when trade is made freer or more restricted - [Demand and Supply as Curves](https://lightmysky.com/learn/civics-and-economics/demand-and-supply-as-curves-mt_FyYrlvzXct): A demand schedule and a supply schedule become two curves on the same axes: quantity demanded falls as price rises, quantity supplied rises with it. Reading a quantity off a price, and a price off a quantity, is the basic move the rest of the model is built from. - [Market Equilibrium, Shortage and Surplus](https://lightmysky.com/learn/civics-and-economics/market-equilibrium-shortage-and-surplus-mt_SarFx2o1IM): Where the two curves cross, the amount buyers want matches the amount sellers offer and the market clears. Away from that price a shortage or a surplus builds up, and what disappointed buyers and stuck sellers do next is the pressure that pushes the price back. - [Shifts in Demand and Supply](https://lightmysky.com/learn/civics-and-economics/shifts-in-demand-and-supply-mt_z7FcJ9BAz3): Income, tastes, the price of a substitute, a new technology or a ruined harvest move a whole curve rather than sliding along it. A fixed routine follows any event through: decide which curve moves, decide which way, then read the new crossing point. - [Inflation, Price Indexes and Real Values](https://lightmysky.com/learn/civics-and-economics/inflation-price-indexes-and-real-values-mt_58FeRqSjYh): Inflation is measured by pricing the same basket of goods year after year and turning each total into an index against a base year. Dividing a money amount by that index converts a nominal figure into a real one, which is the only fair way to compare wages or prices across years. - [GDP: Measuring an Economy and What It Misses](https://lightmysky.com/learn/civics-and-economics/gdp-measuring-an-economy-and-what-it-misses-mt_JFm9bVs0_n): GDP adds up the value of final goods and services produced inside a country in a year, counting output only once so that parts are not double counted. It is the standard measure of an economy's size and a weak measure of life in it, because unpaid work, damage to the environment and how the income is shared all sit outside the total. - [Money and How Banks Create It](https://lightmysky.com/learn/civics-and-economics/money-and-how-banks-create-it-mt_ytmJOgw66I): Money is whatever does three jobs at once: settles a payment, stores value until later, and gives prices a common scale. Banks hold deposits and lend most of them out, and because each loan becomes somebody else's deposit, lending itself enlarges the quantity of money in circulation. - [Interest, Compound Growth and the Cost of Borrowing](https://lightmysky.com/learn/civics-and-economics/interest-compound-growth-and-the-cost-of-borrowing-mt_Zzl9SWMgvQ): Interest is the price of using money before you have it, quoted as a rate per year. Because each year's interest earns interest of its own, the same rate turns a long-running debt into a repayment far above the sum borrowed, and a long-held saving into far more than the deposits put in. - [Price Elasticity of Demand](https://lightmysky.com/learn/civics-and-economics/price-elasticity-of-demand-mt_4ktSwG3D5q): Elasticity puts a number on how strongly quantity answers a price change: the percentage change in quantity divided by the percentage change in price. Whether that number lands above or below one decides whether a price rise raises or lowers what the seller takes in. - [Price Ceilings and Price Floors](https://lightmysky.com/learn/civics-and-economics/price-ceilings-and-price-floors-mt_ycfT-gkRVy): A ceiling is a legal maximum price and a floor is a legal minimum. In the competitive model, a ceiling below equilibrium creates a shortage and a floor above equilibrium creates a surplus. Effects can include waiting lists, reduced upkeep and unsold stock. - [Competition, Market Power and Barriers to Entry](https://lightmysky.com/learn/civics-and-economics/competition-market-power-and-barriers-to-entry-mt_7rSbpD7hJ1): Where many sellers offer the same thing, no one of them holds a price above the rest for long, because a rival takes the sale. Market power comes from barriers to entry such as a patent, a network or control of a resource, and a firm that has it can charge more and sell less than competition would allow. - [Market Failure: Externalities and Public Goods](https://lightmysky.com/learn/civics-and-economics/market-failure-externalities-and-public-goods-mt_TvBDQJqv1R): External costs and benefits can be omitted from private decisions, leading competitive markets to produce too much or too little. Public goods are nonrival and nonexcludable, so voluntary funding can fall short. Taxes, donations and other arrangements can help fund them. - [Risk, Insurance and Pooling](https://lightmysky.com/learn/civics-and-economics/risk-insurance-and-pooling-mt_zrMeXUHV4Y): Insurance shares the cost of covered losses across a pool. Premiums help fund claims and running costs, while reserves help with uncertain payouts. Pooling works best when losses do not all happen together. Hidden risk differences can affect who buys cover and the price of the remaining pool. - [Taxes, Public Spending and the Government Budget](https://lightmysky.com/learn/civics-and-economics/taxes-public-spending-and-the-government-budget-mt_OEjK6v1-F0): Governments raise most revenue from taxes on income, spending and profits, and a tax rarely stays where it is placed: the side of the market that can walk away pays less of it. Spending above revenue means borrowing, and the debt that builds up is judged against the size of the economy rather than in pounds. - [Comparative Advantage and the Gains from Trade](https://lightmysky.com/learn/civics-and-economics/comparative-advantage-and-the-gains-from-trade-mt_gcGxu7E2Y8): With different opportunity costs, countries can gain by specialising where their sacrifice is lower than their partner's and trading on suitable terms. This can expand consumption beyond domestic production limits, even if one country has absolute advantage in both goods. A tariff can reduce these gains. - [Wages and the Labour Market](https://lightmysky.com/learn/civics-and-economics/wages-and-the-labour-market-mt_GhsftwhrYS): Work is traded in a market where firms buy and workers sell, and the wage is the price. Demand for a skill comes from what it earns the employer, supply from how many people can and will do the job, which is what pay gaps between jobs are made of. - [Fiscal Policy: Spending, Taxing and the Deficit](https://lightmysky.com/learn/civics-and-economics/fiscal-policy-spending-taxing-and-the-deficit-mt_TC8A2ecFFL): Governments can spend more than they take, and whether that helps depends on where the economy is in its cycle. A deficit is a flow, a debt is a stock, and confusing the two produces most bad arguments about both. - [Monetary Policy and What a Central Bank Can Do](https://lightmysky.com/learn/civics-and-economics/monetary-policy-and-what-a-central-bank-can-do-mt_w0xvI0iouQ): A central bank sets a short-term interest rate and hopes it reaches mortgages, wages and prices some quarters later. Its tools are blunt, slow and mostly about what people expect will happen. - [Growth, Productivity and Why Some Countries Got Rich](https://lightmysky.com/learn/civics-and-economics/growth-productivity-and-why-some-countries-got-rich-mt_n6KY-0vlw_): Living standards over decades are almost entirely a story about output per hour worked, which comes from tools, skills and institutions. Explaining why a few countries pulled ahead is still an open argument, and the bad answers are easy to spot. - [Measuring Inequality and Arguing About It](https://lightmysky.com/learn/civics-and-economics/measuring-inequality-and-arguing-about-it-mt_oQhtuk8b8T): How unequal a country is depends on whether you measure income or wealth, before or after tax, and per person or per household. Once the measurement is settled the argument about what is fair can actually begin.