igcse economics
Definition of PPC (Production Possibilities Curve)
A graphical representation that illustrates the maximum combination of two goods that can be produced by an economy with all the available resources.
Definition of demand curve

A demand curve is a graphical representation of the price and quantity demanded (QD) by consumers. Image shows increase
Definition of demand
Demand is the want and willingness of consumers to buy a good or services at a given price.
Resources
Resources are the inputs required for the production of goods and services.
The fundamental economic problem is...
The fundamental economic problem is that there is a scarcity of resources to satisfy all human wants and needs. There are finite resources and unlimited wants.
Scarcity
A lack of recourses. the basic economic problem where finite resources are available in relation to infinite human wants and needs.
Finite resources
Finite resources are those that exist in limited quantities and cannot be replaced at the rate they are being used.
Economic goods
Economic goods are those which are scarce in supply and so can only be produced with an economic cost and/or consumed with a price.
Free goods
Free goods are those which are abundant in supply, usually referring to natural sources such as air or sunlight.
the factors of production
The factors of production are the resources used to produce goods and services.
Land is defined
Land is defined as all natural resources used in the production of goods and services.
Labour refers to
Labour refers to the human effort, both physical and mental, that is used in the production of goods and services.
Capital is defined as
Any human-made resource used to produce goods and services.
Enterprise
The ability to take risks and bring together the various factors of production to produce goods or services.
Opportunity cost
The next best alternative that is sacrificed when a decision is made.
Points on PPC
If below the economy is inefficient, because it is producing less than what it can.
Outside the PPC, is unattainable because it is beyond the scope of the economy’s existing resources.
If shifts to left means economy shrinks, if to right means economy grows.
Economy
An area where people and firms produce, trade, and consume goods and services.
Microeconomics and decision makers
Microeconomics is the study of individual markets and sections of the economy, rather than the economy as a whole.
Microeconomic decision makers are producers and consumers.
Macroeconomics and decision makers
Macroeconomics is the study of an entire economy, as a whole.
Macroeconomic decisions are made by the government of the particular economy
Resource allocation and basic economics questions
The way in which economies decide what goods and services to provide, how to produce them and who to produce them for.
In bold are called ‘the basic economic questions’.
Market
Market is an arrangement that brings together all the producers and consumers of a good or service, so they may engage in exchange.
Market equilibrium
Market equilibrium refers to the point where the quantity of a good or service demanded by consumers equals the quantity supplied by producers, resulting in a stable market price.
Market disequilibrium
A situation where the quantity of a good or service demanded by consumers does not equal the quantity supplied by producers.
Results in too much demand or excess supply
How a market system works
A market system works to allocate scarce resources through the forces of demand and supply (the price mechanism)
price mechanism
The process where prices of goods and services are determined by supply and demand in a free market.
Definition of effective demand
Effective demand is where the willingness to buy is backed by the ability to pay.
Quantity demanded.
The effective demand for a particular good or service.
Individual demand
Individual demand is the demand from one consumer.
market demand
The total (aggregate) demand for the product.
aggregate demand
The total demand for all goods and services in an economy at a given overall price level.
Supply curve drawing and definition of supply

The amount of a good/service that a producer is willing and able to supply at a given price in a given time period. Image shows increase.
A shift to the left or right is caused by any factor other than change in price. A change in price causes a contraction or extension up or down the line.
Causes of supply curve shift
Definition of PED (Price Elasticity Of Demand)
A numerical measure of the responsiveness of the quantity demanded to changes in its price.
PED (of a product) = % change in quantity demanded / % change in price.
Types of PED (Price Elasticity Of Demand)

When the % change in quantity demanded is lesser than the % change in price, it is said to have a price inelastic demand. and vice versa.
When the % change in demand and price are equal, that is value is 1, it is called unitary price elastic demand.
When the price changes have no effect on demand whatsoever, it is said to have a perfect price inelastic demand. Their elasticity is 0.
When the quantity demanded changes without any changes in price itself, it is said to have an infinitely price elastic demand.
What effect PED and PES
PED: Number of substitutes, wether luxury or necessity, time it is increased for.
PES:
Definition of PES (Price Elasticity Of Supply)
A numerical measure of the responsiveness of its quantity supplied it to changes in its price.
PES of a product = %change in quantity supplied / % change in price.
Types of PES (Price Elasticity Of Supply)

price elastic supply, price inelastic supply, perfectly price inelastic supply, infinitely price elastic supply and unitary price elastic supply.
Definition of market economic system
An economy that has no government intervention in the allocation of resources and distribution of goods/services.
The key terms associated with market failure: public good, merit good, demerit good, social benefits, external benefits, private benefits, social costs, external costs, private costs. definitions
Definition of the mixed economic system
A blend of a market economy and a planned economy, where the public and private sector all have a role in owning and allocating resources.
Characteristics of money
Durable, portable, recognisable, identical, and dividable.
Functions of money
-Medium of exchange (selling and buying)
-Store of value (when saved)
-Standard of deferred payments (allowing borrowing and spending)
-Unit of account (measure of value of goods)
Money definition and legal tender
Money - a universally accepted medium of exchange.
Legal tender - Any form of payment that must be accepted by law to settle a debt.
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The role and importance of central banks and commercial banks for government, producers and consumers.
Central Banks
Commercial Banks
factors affecting an individual’s choice of occupation
: Wage and non-wage factors.
wage factors - higher pay, overpay, bonuses, commision
Non wage - job satisfaction, type of work (manual, non-manual etc), work conditions, hours, holidays, pensions, fringe benefits, job security, prospect of promotion, size of firm, location
wage determination
Demand and supply of labour in jobs, trade unions, minimum wage, discrimination, skilled workers and esteem of job.
Advantages and disadvantages for workers, firms and the economy of specialisation
For Workers
For Firms
For the Economy
definition of a trade union
Trade Union is a group of workers who join together to protect their interests and work for better wages and working conditions using collective bargaining.
the role of trade unions
Engaging in collective bargaining on wages, working hours and working conditions; protecting employment; and influencing government policy, take industrial action, provide training schemes.
things effecting the role of trade unions
-Strong economy means industries are doing well so can afford to treat workers well, they will also require workers and there will be low unemployment so they will want to retain workers and make it easier to recruit more.
-higher number of member, higher bargaining power, more funds and not many non-union member to replace union members with.
-if contains high skilled members as harder to replace
-consistent demand for product workers produce
-favorable gov legislation
The advantages and disadvantages of trade union activity for workers, firms and the government.
For Workers
For Firms
For the Government
internal and external economies and diseconomies of scale
The advantages and disadvantages of small firms, the challenges facing small firms and reasons for their existence.
Small firms thrive on close customer relationships, personalized services, and quick adaptability to market changes, offering unique products.
However, they face challenges like limited financial resources, difficulty attracting experienced staff, intense competition from larger firms, and vulnerability to economic downturns.
Small firms exist because of small market sizes, consumer preference for personalized services, owner preference for remaining small, lack of capital for expansion.
Definition, example, and advantages and disadvantages of the three types of mergers.
Horizontal Merger
Vertical Merger
Conglomerate Merger
Factors that effect the demand for factors of production
Demand for the product, the price of different factors of production, their availability and their productivity.
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Total cost (TC), average total cost (ATC), fixed cost FC), variable cost (VC), average fixed cost (AFC), average variable cost (AVC) definition and calculations and diagram

Fixed costs (FC) are costs that do not change with the level of output.
Variable costs (VC) are costs that change with output.
Total cost (TC) is the combination of FC and VC.
Average total cost (ATC) is TC divided by output, or total costs per unit of output.
Average fixed cost (AFC) is FC divided by output, or fixed costs per unit of output.
Average variable cost (AVC) is VC divided by output, or variable costs per unit of output.
Total revenue (TR) and average revenue (AR) definition and calculations
Total Revenue (TR) is the total income a firm receives from selling all its output, calculated as Price × Quantity.
Average Revenue (AR) is the revenue per unit sold, found by dividing Total Revenue by the quantity sold, meaning AR is equal to the price per unit.
objectives of firms 4
Survival, social welfare, profit maximisation and growth.
Characteristics, advantages and disadvantages of a monopoly.
Advantages include economies of scale, potentially invest in innovation but disadvantages include higher prices, reduced choice, potential for inefficiency (X-inefficiency), and no consumer sovereignty.
the role of government
Locally, nationally and internationally.
At a local level, governments manage services like local infrastructure, sanitation, and housing to meet community needs.
Nationally, they focus on macroeconomic goals such as controlling inflation, reducing unemployment, promoting economic growth, and ensuring social welfare through policies like taxes, subsidies, and infrastructure projects.
Internationally, governments engage in diplomacy, negotiate trade agreements, provide foreign aid, and manage international trade through restrictions or open markets to foster global relations and economic stability.
the macroeconomic aims of government.
Reasons behind the choice of aims and the criteria that governments set for each aim. Possible conflicts between aims.
1. Economic Growth
2. Full Employment/Low Unemployment
3. Stable Prices/Low Inflation
4. Balance of Payments Stability
5. Redistribution of Income
Possible conflicts between aims:
-full employment versus stable prices (as when low unemployment higher demand for workers so businesses may have to raise wages leading to inflation.)
- economic growth versus balance of payments stability (Rapid economic growth can lead to increased imports and a trade deficit, as more demand and consumer disposable income.)
-full employment versus balance of payments stability as (Policies to achieve full employment might lead to increased wages and costs, making exports less competitive and potentially worsening the balance of payments.)
definition of the government budget
A financial plan outlining the government's expected revenue and planned expenditure for a specific period, usually one year.
main areas of government spending and the reasons for and effects of spending in these areas.
Main government spending areas include public goods and merit goods, welfare and social protection, infrastructure, and debt interest payments.
Reasons for spending are to correct market failures (like free riders and under-consumption), redistribute income, boost economic growth, and provide essential services. Spending effects include job creation, improved living standards, increased productivity, potential inflation, and changes in national debt.
reasons for levying taxation
types of tax
The qualities of a good tax.
The impact of taxation on consumers, producers, government and economy as a whole.
Consumers: Taxes raise prices, reduce disposable income, and influence buying behavior (e.g., discouraging harmful goods).
Producers: Taxes increase production costs, reduce supply, lower profits, and may cause inefficiencies in markets.
Government: Taxes provide revenue for public services, help stabilize the economy, redistribute income, and correct market failures.
Economy as a Whole: Taxes affect economic activity, can either reduce or improve efficiency, and support social welfare through public goods and inequality reduction.
definition of fiscal policy
Fiscal policy is a government policy which adjusts government spending and taxation to influence the economy.
Calculating a Budget Deficit or Surplus:
Budget Deficit = Government Spending - Government Revenue opposite for surplus
definition of money supply and monetary policy
The money supply is the amount of money in an economy at any given moment in time.
Monetary policy is adjusting monetary policy measures like interest in order to influence the total demand in an economy.
monetary policy measures and effects
Changes in interest rates, money supply and foreign exchange rates.
Exchange Rate Stability
definition of supply-side policy
Supply side policies are microeconomic policies aimed at increasing supply in the economy,
supply-side policy measures and effects on government macroeconomic aims
Possible supply-side policy measures include:
education and training, labour market reforms, lower direct taxes, deregulation, improving incentives to work and invest, and privatisation.
2. Labour Market Reforms:
3. Lower Direct Taxes:
4. Deregulation:
6. Privatisation:
definition of economic growth
The annual increase in the level of national output as measured by the gross domestic product (GDP).
measurement of economic growth 2 GDP ones
Real Gross Domestic Product (GDP) is the value of all goods and services produced in a country annually, adjusted for inflation.
Real GDP Growth Rate = Nominal GDP Growth Rate - Inflation Rate
GDP per capita, calculated by dividing Real GDP by the total population, showing the average output or income per person.
Meaning of recession
A recession occurs when an economy experiences two or more consecutive quarters of negative GDP growth
The costs and benefits of economic growth
Benefits of Economic Growth
Costs of Economic Growth
policies to promote economic growth
demand-side policies, which boost total spending through fiscal (government spending and taxation) and monetary (interest rates and money supply) measures.
supply-side policies, which improve the economy's productive capacity through education, training, deregulation, and investment incentives
definition of employment, unemployment and full employment
Employment: the economic use of labour as a factor of production ·
Full Employment is the situation where the entire labour force is employed. That is, all the people who are able and willing to work are employed.
A situation where people in the labour force who are able and willing to work are unemployed.
How unemployment is measured and the formula for the unemployment rate.
(Number of Unemployed / Total Labour Force) x 100.
Claimant Count : The number of people registered as officially unemployed and claiming unemployment benefits.
Labour Force Survey (LFS) : A regular survey of households that asks a series of questions to classify people as employed, unemployed, or economically inactive, based on ILO criteria.
causes/types of unemployment
Frictional Unemployment : (This is a natural, short-term form of unemployment) When people are temporarily between jobs or first entering the workforce.
Structural Unemployment is caused by a long-term mismatch between the skills workers possess and the skills demanded by employers (often caused by development, or a mismatch between the worker's location and job availability.)
Cyclical unemployment : Unemployment caused by a fall in the overall demand for goods and services, typically occurring during a recession or economic slowdown.
The consequences of unemployment for the individual, firms and the economy as a whole.
Unemployment has negative consequences for individuals (loss of income, health issues, damaged self-esteem), firms (reduced sales, lower output, loss of skills), and the overall economy (lower GDP, decreased tax revenue, increased government spending on benefits, economic stagnation).
definition of inflation and deflation
inflation is a sustained increase in the general price level of goods and services in an economy over time.
Deflation is a sustained decrease in the general price level of goods and services in an economy over time.
Measurement of inflation and deflation using the Consumer Prices Index (CPI).
Tracking the average change over time in the prices of a "basket" of consumer goods and services.
new CPI - old CPI / old CPI x 100.
A positive result indicates inflation, while a negative result signifies deflation.
Causes of inflation
Demand-Pull Inflation: Occurs when the total demand for goods and services in an economy exceeds the total supply.
Cost-Push Inflation: Occurs when the costs of producing goods and services rise.
Causes of deflation
Demand-Side Deflation: Results from a general decrease in aggregate demand in the economy.
Supply-Side Deflation: Occurs due to an increase in the overall supply of goods and services or a decrease in production costs.
The range of policies available to control inflation and deflation
The consequences of inflation and deflation for consumers, workers, savers, lenders, firms and the economy as a whole.
Inflation (rising prices)
deflation
Real GDP per head and the Human Development Index (HDI), pros and cons
The Human Development Index (HDI) combines income, life expectancy, and education into a single score.
Real GDP per Head : The total value of goods and services produced in an economy, adjusted for inflation, and divided by the total population.
Reasons for differences in living standards and income distribution within and between countries.
Factors Within Countries,: Education and skills, different employment opportunities, government policies, Inheritance and wealth, Discrimination, Rural vs. Urban Divide due to varying access to services and economic opportunities.
Factors Between Countries, Economic Structure: Countries with economies heavily reliant on the primary sector (agriculture) and a large proportion of the workforce in informal, low-wage jobs often have lower living standards. Economic Development & Technology, Natural Resources, Conflict, Crime, and Natural Disasters, Geographic Factors impact its ability to engage in trade, access markets, and experience economic growth.
definition of absolute and relative poverty, how measured
Absolute poverty: the inability to afford basic necessities needed to live. It's measured by the number of people living below the poverty line.
Relative Poverty is a situation where a person lacks the resources to maintain the average standard of living within their society. It's measured by a percentage of the national median income (e.g., less than 60% of the median).
causes of poverty : including unemployment, low wages, illness and age.
Policies include: promoting economic growth, improved education, more generous state benefits, progressive taxation, and national minimum wage.
advantages and disadvantages of specialisation and reasons
definition of globalisation
Globalisation is the increased economic interconnectedness of countries through increasing cross-border movement of people, goods/services, technology and finance.
multinational corporation definition
a business that has production facilities in two or more countries
MNCs and the costs and benefits to home and host countries.
Impact on home country:
Advantages:
Disadvantages :
Impact on host country
Advantages:
Disadvantages:
the benefits of free trade or consumers, producers and the economy
Consumers: Lower prices, Greater variety, Higher quality.
Producers: Expanded markets, Economies of scale, Lower costs: Producers can access cheaper raw materials and other production resources cheeper from other countries. Increased efficiency and innovation: Competition from foreign firms incentivises domestic companies to innovate.
For the economy: Economic growth, Efficient resource allocation: Countries can specialise in producing goods where they have a comparative advantage, leading to more efficient use of global resources. Increased competition so higher efficiency and Higher incomes and living standards, Spread of technology and ideas. Stronger international relations.
methods and reasons of protection
Tariffs are taxes on imported goods.
Quotas limit the quantity of imports.
Subsidies are government payments to domestic producers.
Embargoes are complete bans on trade.
To protect infant and declining industries, Strategic industries (industries that are considered crucial for a country's long-term economic growth or national security), and avoidance of dumping (when a company exports a product to another country at a price lower than its domestic market price or even below the cost of production leading to unfair competition).
*improving a country's trade balance in the short term by making imports more expensive and less competitive. However, it often leads to higher consumer prices, reduced choice, and can provoke retaliatory measures from trading partners, potentially harming export competitiveness and increasing global trade friction.
definition of foreign exchange rate
and two systems
the price of one country's currency in terms of another country's currency
Floating exchange rates are determined by market forces without government intervention, while fixed exchange rates are pegged to another currency by the government or central bank.
Floating exchange rate Advantages
Disadvantages
Fixed exchange rate: Stability and predictability which promotes trade and investment. But Loss of monetary policy independence: The central bank must focus on maintaining the fixed rate, limiting its ability to use interest rates for other domestic economic goals. Requires large foreign reserves: The central bank needs to hold large reserves to intervene and defend the peg if necessary. Vulnerability to speculative attacks: If speculators believe a fixed rate is unsustainable, they can attack the currency, potentially causing a currency crisis. Difficult to adjust: It can be hard to adjust to external shocks, sometimes requiring difficult and painful economic restructuring or devaluation.
causes of foreign exchange rate fluctuations
Changes in the demand for exports and imports
Changes in the rate of interest
Speculation
the entry or departure of MNCs.
How change rate fluctuation impacts price of exports and imports.
A currency appreciation makes exports more expensive for foreign buyers and imports cheaper for domestic consumers, while a depreciation does the opposite.
The total effect of these changes on the volume of spending depends on the price elasticity of demand (PED)
Current account of balance of payments structure and calculation

Trade in goods and services
Reasons for current account deficit and consequences
Causes of a current account deficit
Consequences of a current account deficit
Policies to achieve balance of payments stability
Policies to achieve balance of payments stability include exchange rate policies (A government can choose (devaluation) to devalue its currency to make exports cheaper and imports more expensive, thus improving the balance of payments or let it happen naturally from a current account deficit (Floating Exchange Rate)
Fiscal and monetary policies to reduce national income and demand, This decreases spending on imports, which helps to improve the balance of payments deficit.
Supply-side policies (to improve international competitiveness).