In this post, we’ll unpack all you need to know about economics, defining exactly what it is, unpacking the key concepts that are important to understand and more.
What Is Economics?
Economics is the study of how individuals, businesses and governments make choices about how to allocate resources to satisfy their wants and needs.
Economics examines how these groups interact within markets to determine the production, distribution and consumption of goods and services.
Microeconomics Versus Macroeconomics
Microeconomics is a bottom-up approach and focuses on the behaviour of individuals, households and businesses within specific markets.
Macroeconomics is a top-down approach and focuses on economy-wide outcomes such as growth, inflation, employment and business cycles.
Microeconomics focuses on economic components individually. Macroeconomics focuses on economics components collectively.
Monetary Policy Versus Fiscal Policy
There are two pillars of macroeconomic policy: monetary policy and fiscal policy.
Monetary policy refers to actions taken by a central bank to influence economic activity and maintain economic stability.
It has two main objective: controlling consumer spending and controlling aggregate demand (AD) via two ways: interest rates and quantitative easing (QE). The goal is to avoid the worst of the highs and lows of the economic cycle, while keeping inflation low and stable.
Fiscal policy refers to the use of government spending and taxation to influence economic activity. It has two main objectives: changing the level of government spending and changing the level of taxation.
Systems
There are three main types of economic systems: the free market, the command economy and the mixed economy.
The Free Market
The free market (also known as a market economy or laissez-faire) refers to an economic system where prices for goods and services are determined by supply and demand on the open market.
Market failures occur when the free market fails to allocate resources efficiently. Market failures can either be complete and partial. A complete market failure refers to a situation where the market fails to produce a good or service altogether, even though it would benefit society. A partial market failure refers to a situation where a good or service is produced, but in the wrong quantity, meaning resources are not allocated efficiently.
Externalities refer to when a third party is affected by a transaction they are not involved in, such as pollution. Externalities can either be positive or negative. Positive externalities refer to benefits experienced by third parties who are not directly involved in the transaction. Negative externalities refer to costs imposed on third parties who are not directly involved in the transaction.
The Command Economy
The command economy (also known as central planning or communism) refers to an economic system where the means of production and distribution are controlled by the state rather than by private actors.
The Mixed Economy
The mixed economy refers to an economic system that is a mix between the market economy and the command economy. Both the public sector (government) and the private sector play a role in the allocation of resources and the production of goods and services.
Capitalism
Capitalism, also known as free market economy, is a socioeconomic system whereby the means of production and distribution are controlled by private actors rather than by the state.
Capitalism relies on private ownership and market coordination. Communism relies on state ownership and central planning.
Capitalism remains the best system we have yet discovered of running a thriving economy.
Markets
There are two fundamental ways of coordinating economic activity; central direction through involuntary coercion and decentralised direction through voluntary cooperation.
There are three main markets in the economy; the goods market, the labour market and the financial market.
Factors Of Production
Factors of production are the inputs needed in the production process to produce a good or service.
There are four main elements: capital, land, labour and entrepreneurship
Capital refers to the man-made resources used during the production of goods and services, including machinery, tools, equipment, and buildings. Income generated from capital is called interest.
Land refers to all natural resources used during the production of goods and services, including land, water, minerals and energy. all economic activity ultimately depends on natural resources.
Labour refers to any human input used during the production of goods or services, whether mental or physical. The income generated by labour is called wages.
Entrepreneurship (also known as enterprise) refers to the ability to organise, combine and take risks with the other factors of production to create goods or services. The individuals that bring together all of the other elements are called entrepreneurs. The income generated from entrepreneurship is called profit.
Scarcity
Scarcity is the foundation of economics. It is the fundamental economic problem of having limited resources to meet unlimited wants and needs. It forces individuals and societies to make choices about how to allocate resources efficiently. Time, capital, land and labour are all scarce recourses.
Opportunity Cost
Opportunity cost is the value of the best alternative you give up when you choose something. It is the hidden “price” of every decision: what you could have potentially gained instead with the same time, money or attention.
Value
Value is that which humans act to gain or keep.
All human interactions are transactions, of time, energy and attention.
When two parties consent to a transaction, it is only because they each believe they will be better off after the trade. This is the only reason trade occurs: because we each value things differently at different times and in different places. If humans always valued everything equally in all times and in all places, then trade would never occur.
Elasticity
Elasticity measures how sensitive buyers or sellers are to price changes. There are three main types: price elasticity of demand, income elasticity of demand and cross elasticity of demand.
When the percentage change in demand is less than the percentage change in price, then a good or service is inelastic. When the percentage increase in price leads to greater percentage decrease in demand, then a good or service is elastic.
Supply & Demand
Both supply and demand are the fundamental forces that determine prices in a market. This mechanism is referred to as the Invisible Hand.
Supply reflects how much producers are willing and able to sell a good or service at a specific price. Demand reflects how much consumers are willing and able to buy a good or service at a specific price.
When demand exceeds supply, prices rise. When supply exceeds demand, prices fall. If supply is equal to demand, it is referred to as the equilibrium point.
Incentives
Incentives are factors that motivate and influence the behaviour of individuals and organisations.
The 3 main types of incentives are economic, social and moral.
Incentives can either be financial, such as rewards and penalties, or non-financial, such as social recognition and intrinsic satisfaction.
Incentives drive outcomes.
Money
Money is an information system.
It has 3 functions: store of value, medium of exchange and unit of account.
The quality of money matters. When money is stable, it encourages saving, long-term planning and productive investment. When it is unstable, it distorts behaviour, rewards speculation and erodes purchasing power.
Growth
Economic growth comes from productivity — doing more with the same inputs. This is driven by technology, capital formation, education and efficient institutions. Growth is not guaranteed; it must be earned through investment, innovation and sound incentives.
Government
Governments shape the economic environment through taxes, spending, regulation and monetary policy. At their best, they provide stability, rule of law and public goods. At their worst, they distort markets, misallocate capital and create long-term fragility.
A subsidy is a benefit given to businesses by government to encourage production and consumption.
Public Goods
Public goods are goods or services that benefit all members of society that the government provides through taxation.
A pure public good is one that is impossible to exclude from an individual consuming. For example, national defense.
This gives rise to the free rider problem which refers to individuals benefiting from a good or service without paying for it, relying on others to bear the cost.
Cycles
Economies move in cycles. Periods of expansion are followed by periods of contraction. Booms sow the seeds of busts. Understanding cycles helps explain why volatility is not a flaw of the system, but a feature of it.
Inflation
Inflation refers to the rate at which the general level of prices for goods and services rises, leading to a decrease in purchasing power. It is therefore a critical indicator of economic health, influencing everything from interest rates to wages.
Gross Domestic Product (GDP)
Gross Domestic Product (GDP) measures the total value of all goods and services produced within a country over a specific period. It serves as a broad indicator of a nation’s economic activity and health.
- Population Growth: The more people there are, the more people contributing to the economy.
- Productivity Growth: The more productive people are, the more they are producing.
- Debt Growth: Is a way of offsetting poor population and productivity but robs people of future via inflation.
Monetary Policy
Monetary policy involves the actions taken by a country’s central bank to control the money supply and interest rates. This helps manage economic growth, control inflation, and stabilize the currency.
Fiscal Policy
Fiscal policy is the use of government spending and taxation to influence the economy. By adjusting its levels of spending and tax rates, the government can either stimulate economic growth or cool down an overheated economy.
Marginality
Marginal cost is the additional cost of producing one more unit of a good of service. It is the cost of the next unit, not the average of all units.
Marginal utility is the additional benefit gained from consuming one more unit of a good or service. It is the satisfaction of the next unit, not the total benefit so far. The law of diminishing marginal utility states that as each extra unit of a good is consumed, satisfaction falls and the good is less valuable.
Marginal revenue refers to the additional revenue gained from selling one extra unit of a good or service
Trade
Trade involves the exchange of goods and services between countries.
It allows specialisation. By focusing on what they do best, individuals and nations increase total output and efficiency. Voluntary exchange is positive-sum.
The trade balance, which is the difference between a country’s exports and imports, can indicate economic strength. A trade surplus indicated more exports than imports. A trade deficit indicates more imports than exports.
Division Of Labour
Division of labour is when work is broken into specialised tasks, so people focus on what they do best.
Specialisation boosts speed, skill and efficiency, which increases output and lowers costs. Trade is what links those specialists together.
Comparative Advantage Versus Competitive Advantage
Comparative advantage, also known as Ricardo’s Law, refers to how entities benefit most by specialising in and producing what they are best at and then trading for other goods and services.
Absolute advantage refers to an entity’s ability to produce a good or service more efficiently than others, meaning it can produce the same output with fewer resources or at a lower cost.
Costs & Benefits
Costs and benefits analysis involves weighing the expected costs against the expected benefits of a decision. This helps in making rational economic choices, ensuring that the benefits outweigh the costs.
Tragedy Of The Commons
The tragedy of the commons describes how a shared, open-access resource gets overused because individuals capture the private benefit of consuming more, while the cost is spread across everyone.
Without clear property rights, pricing or rules, rational self-interest leads to depletion and a worse outcome for the group.
Economies Of Scale Versus Diseconomies Of Scale
Economies of scale refers to the cost advantages firms experience as production increases, leading to a lower average cost per unit. Diseconomies of scale refers to the rise in average costs that can occur when a firm becomes too large and operations become inefficient.
Globalisation
Globalisation refers to the process by which economies have been drawn closer together through the increasing integration and interdependence of national economies in terms of trade, financial flows, ideas, information and technology.
Conclusion (TL;DR)
Economics is the study of how individuals, businesses and governments allocate resources to satisfy their wants and needs.
