Source: https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-2-1-elasticities-of-demand [Revision notes](https://senecalearning.com/en-gb/revision-notes.md) › [IB Diploma](https://senecalearning.com/en-gb/revision-notes/ib-diploma.md) › [Economics](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics.md) › [Economics: IB Diploma](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma.md) › Elasticities of Demand # Elasticities of Demand Economics: IB Diploma, topic 1.2.1 ## Elasticity Elasticity measures the responsiveness of one variable to the change in another variable. ### Price elasticity of demand (PED) ![Price elasticity of demand (PED)](https://image-v2.cdn.app.senecalearning.com/2018-08/ec86d3fd-531b-4b64-9973-8c74c04a96f5/PED%20Equation.png) - Price elasticity = % change in quantity demanded ÷ % change in price. - Elastic demand is where the PED > 1. - Inelastic demand is where the PED < 1. - Unitary elasticity is where the PED = 1. - PED is almost always negative as an increase in price would result in a decrease in demand. But you may see some questions refer to it as positive for ease. ### Income elasticity of demand (YED) ![Income elasticity of demand (YED)](https://image-v2.cdn.app.senecalearning.com/2018-08/ea962048-092e-481b-a485-684ee7500361/YED%20Equation.png) - Income elasticity of demand = % change in quantity demanded ÷ % change in income. - Normal goods have a positive income elasticity, YED > 0 (income rises; demand increases). - Inferior goods have negative income elasticity, YED < 0 (income rises; demand decreases). - For example, those with higher income may buy fewer burgers and more steaks. Burgers in this case are an inferior good. - YED can be positive or negative. ### Cross-price elasticity of demand (XED) ![Cross-price elasticity of demand (XED)](https://image-v2.cdn.app.senecalearning.com/2018-08/f8c10996-52fe-4e25-8a30-0929ce062797/XED%20Equation.png) - Cross-price elasticity of demand is when a change in the price of one good can change the quantity demanded of another. - Cross-price elasticity of demand = % change in quantity demanded of good A ÷ % change in the price of good B. - XED is positive if the goods are substitutes and negative if the goods are complements - you can work this out for yourself but also try to remember it! - If XED is close to zero this would suggest that the goods are unrelated. ## Complement Goods vs Substitute Goods The cross-price elasticity of demand (XED) for complements is negative because a fall in the price of one good will increase the quantity demanded for the other good. ### Complement goods ![Complement goods](https://image-v2.cdn.app.senecalearning.com/2018-08/0192dae0-cf25-4d5d-b17b-d68bbf20c07f/peanut-butter-.jpg) - For complements, a fall in the price of one good will lead to an increase in the quantity demanded for the other good. Complements have negative cross-price elasticities of demand. - E.g. peanut butter and bread. - E.g ice cream and sun cream. - XED < 0 ### Substitute goods ![Substitute goods](https://image-v2.cdn.app.senecalearning.com/2018-08/8b0c5e0b-5067-45f4-9141-371edb45bdad/tea-coffee-.jpg) - For, substitutes, a fall in the price of one will lead to a fall in the quantity demanded of the other. Substitutes have positive cross elasticities of demand. - E.g. coffee and tea. - XED > 0 ### Independent goods ![Independent goods](https://image-v2.cdn.app.senecalearning.com/2018-04/4147369e-4ca6-4108-bc69-d8c878f7b902/shutterstock_62399470.jpg) - Independent goods have a cross-price elasticity of demand of zero. - E.g donkeys and ice cream. - XED = 0 ## Test yourself on Elasticities of Demand - What is another way to describe elasticity? - Why might the demand for burgers go up in a recession? - Which of these could be a complement to peanut butter? - In the context of economic theory, which of these could be a substitute for school? [Practise this topic for free](https://app.senecalearning.com/classroom/course/7b55fd22-05a1-435c-9704-355732f0e415/section/e02b4373-5e04-45a3-bbc4-5a151f424b00/session) - Previous topic: [1.1.8 IB Multiple Choice - Supply](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-1-8-ib-multiple-choice-supply.md) - Next topic: [1.2.2 Factors Affecting Price Elasticity of Demand](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-2-2-factors-affecting-price-elasticity-of-demand.md) ## Economics: IB Diploma contents ### 1 Microeconomics - 1.1 Competitive Markets: Demand & Suply - [1.1.1 Markets & Demand](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-1-1-markets-and-demand.md) - [1.1.2 Diminishing Marginal Returns](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-1-2-diminishing-marginal-returns.md) - [1.1.3 Supply](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-1-3-supply.md) - [1.1.4 Market Equilibrium](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-1-4-market-equilibrium.md) - [1.1.5 Price Mechanism](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-1-5-price-mechanism.md) - [1.1.6 Consumer & Producer Surplus](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-1-6-consumer-and-producer-surplus.md) - [1.1.7 IB Multiple Choice - Demand](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-1-7-ib-multiple-choice-demand.md) - [1.1.8 IB Multiple Choice - Supply](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-1-8-ib-multiple-choice-supply.md) - 1.2 Elasticity - [1.2.1 Elasticities of Demand](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-2-1-elasticities-of-demand.md) - [1.2.2 Factors Affecting Price Elasticity of Demand](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-2-2-factors-affecting-price-elasticity-of-demand.md) - [1.2.3 Elasticity of Supply](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-2-3-elasticity-of-supply.md) - [1.2.4 Price Elasticity of Supply](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-2-4-price-elasticity-of-supply.md) - [1.2.5 IB Multiple Choice - Price Elasticity of Demand](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-2-5-ib-multiple-choice-price-elasticity-of-demand.md) - [1.2.6 IB Multiple Choice - Price Elasticity of Supply](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-2-6-ib-multiple-choice-price-elasticity-of-supply.md) - [1.2.7 IB Multiple Choice - Other Elasticities](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-2-7-ib-multiple-choice-other-elasticities.md) - 1.3 Government Intervention - [1.3.1 Indirect Taxes & Subsidies](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-3-1-indirect-taxes-and-subsidies.md) - [1.3.2 Application Question - Taxing Prices or Quantities](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-3-2-application-question-taxing-prices-or-quantities.md) - [1.3.3 Subsidies & Price Controls](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-3-3-subsidies-and-price-controls.md) - [1.3.4 Deadweight Loss & Government Intervention](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-3-4-deadweight-loss-and-government-intervention.md) - [1.3.5 Elasticity & Tax Incidence](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-3-5-elasticity-and-tax-incidence.md) - [1.3.6 IB Multiple Choice - Government Intervention](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-3-6-ib-multiple-choice-government-intervention.md) - 1.4 Market Failure - [1.4.1 Types of Market Failure](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-4-1-types-of-market-failure.md) - [1.4.2 Introduction to Externalities](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-4-2-introduction-to-externalities.md) - [1.4.3 Negative Externalities](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-4-3-negative-externalities.md) - [1.4.4 Policy for Negative Externalities](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-4-4-policy-for-negative-externalities.md) - [1.4.5 Positive Externalities](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-4-5-positive-externalities.md) - [1.4.6 The Deadweight Welfare Loss of Externalities](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-4-6-the-deadweight-welfare-loss-of-externalities.md) - [1.4.7 Case Study - The Externalities of Education](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-4-7-case-study-the-externalities-of-education.md) - [1.4.8 Public Goods & the Free-Rider Problem](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-4-8-public-goods-and-the-free-rider-problem.md) - [1.4.9 Asymmetric Information](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-4-9-asymmetric-information.md) - [1.4.10 End of Topic Test - Market Failure](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-4-10-end-of-topic-test-market-failure.md) - [1.4.11 Application Questions - Market Failure](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-4-11-application-questions-market-failure.md) - 1.5 HL: Theory of the Firm & Market Structures - [1.5.1 Theory of the Firm & Market Structures](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/1-5-1-theory-of-the-firm-and-market-structures.md) ### 2 Macroeconomics - 2.1 The Level of Overall Economic Activity - [2.1.1 The Circular Flow of Income](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-1-1-the-circular-flow-of-income.md) - [2.1.2 Defining GDP](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-1-2-defining-gdp.md) - [2.1.3 Limitations of GDP](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-1-3-limitations-of-gdp.md) - [2.1.4 IB Multiple Choice - Economic Indicators](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-1-4-ib-multiple-choice-economic-indicators.md) - [2.1.5 Business Cycles](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-1-5-business-cycles.md) - [2.1.6 Output Gaps](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-1-6-output-gaps.md) - 2.2 Aggregate Demand & Aggregate Supply - [2.2.1 The Aggregate Demand Curve](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-2-1-the-aggregate-demand-curve.md) - [2.2.2 Components of Aggregate Demand](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-2-2-components-of-aggregate-demand.md) - [2.2.3 Shape of the Aggregate Demand Curve](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-2-3-shape-of-the-aggregate-demand-curve.md) - [2.2.4 Shifts in Aggregate Demand](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-2-4-shifts-in-aggregate-demand.md) - [2.2.5 IB Multiple Choice - Aggregate Demand](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-2-5-ib-multiple-choice-aggregate-demand.md) - [2.2.6 Short & Long-Run Aggregate Supply](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-2-6-short-and-long-run-aggregate-supply.md) - [2.2.7 Alternative Models of LRAS](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-2-7-alternative-models-of-lras.md) - [2.2.8 Equilibrium in the AD-AS Model](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-2-8-equilibrium-in-the-ad-as-model.md) - [2.2.9 Output Gaps & the AD-AS Model](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-2-9-output-gaps-and-the-ad-as-model.md) - 2.3 Macroeconomic Objectives - [2.3.1 Introduction to Unemployment](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-3-1-introduction-to-unemployment.md) - [2.3.2 Limitations of Unemployment](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-3-2-limitations-of-unemployment.md) - [2.3.3 Types of Unemployment](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-3-3-types-of-unemployment.md) - [2.3.4 Causes & Impact of Unemployment](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-3-4-causes-and-impact-of-unemployment.md) - [2.3.5 Defining Inflation](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-3-5-defining-inflation.md) - [2.3.6 Measuring Inflation](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-3-6-measuring-inflation.md) - [2.3.7 Use of Index Numbers](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-3-7-use-of-index-numbers.md) - [2.3.8 The Consumer Price Index](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-3-8-the-consumer-price-index.md) - [2.3.9 Consequences of Inflation](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-3-9-consequences-of-inflation.md) - [2.3.10 Causes of Inflation](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-3-10-causes-of-inflation.md) - [2.3.11 Inflation & Unemployment Tradeoff](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-3-11-inflation-and-unemployment-tradeoff.md) - [2.3.12 The Short-Run Phillips Curve](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-3-12-the-short-run-phillips-curve.md) - [2.3.13 The Long-Run Phillips Curve](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-3-13-the-long-run-phillips-curve.md) - 2.4 Economic Growth, Poverty & Inequality - [2.4.1 Measuring Economic Growth](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-4-1-measuring-economic-growth.md) - [2.4.2 Determinants of Productivity](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-4-2-determinants-of-productivity.md) - [2.4.3 Economic Growth & Productivity](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-4-3-economic-growth-and-productivity.md) - [2.4.4 Absolute & Relative Poverty](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-4-4-absolute-and-relative-poverty.md) - [2.4.5 Inequality](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-4-5-inequality.md) - [2.4.6 Inequality 2](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-4-6-inequality-2.md) - [2.4.7 Lorenz Curve](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-4-7-lorenz-curve.md) - [2.4.8 Government Policy on Poverty](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-4-8-government-policy-on-poverty.md) - [2.4.9 End of Topic Test - Poverty & Inequality](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-4-9-end-of-topic-test-poverty-and-inequality.md) - [2.4.10 Application - Inequality & Poverty](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-4-10-application-inequality-and-poverty.md) - 2.5 Fiscal Policy - [2.5.1 Introduction to Fiscal Policy](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-5-1-introduction-to-fiscal-policy.md) - [2.5.2 Fiscal Policy and AD-AS Model](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-5-2-fiscal-policy-and-ad-as-model.md) - [2.5.3 Fiscal Policy Lags](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-5-3-fiscal-policy-lags.md) - [2.5.4 Automatic Stabilizers](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-5-4-automatic-stabilizers.md) - [2.5.5 IB Multiple Choice - Fiscal Policy](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-5-5-ib-multiple-choice-fiscal-policy.md) - 2.6 Monetary Policy - [2.6.1 Objectives of Monetary Policy](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-6-1-objectives-of-monetary-policy.md) - [2.6.2 Monetary Policy Implementation](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-6-2-monetary-policy-implementation.md) - [2.6.3 Monetary Policy & AD-AS Model](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-6-3-monetary-policy-and-ad-as-model.md) - [2.6.4 Monetary Policy Lags & Pitfalls](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-6-4-monetary-policy-lags-and-pitfalls.md) - 2.7 Supply-Side Policies - [2.7.1 Supply-Side Policies](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-7-1-supply-side-policies.md) - [2.7.2 Supply-Side Policies 2](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/2-7-2-supply-side-policies-2.md) ### 3 The Global Economy - 3.1 International Trade - [3.1.1 Globalisation](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-1-1-globalisation.md) - [3.1.2 Globalisation for LEDCs](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-1-2-globalisation-for-ledcs.md) - [3.1.3 Globalisation for MEDCs](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-1-3-globalisation-for-medcs.md) - [3.1.4 Comparative Advantage & Trade](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-1-4-comparative-advantage-and-trade.md) - [3.1.5 Protectionism](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-1-5-protectionism.md) - [3.1.6 Arguments for Protectionism](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-1-6-arguments-for-protectionism.md) - [3.1.7 Arguments Against Protectionism](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-1-7-arguments-against-protectionism.md) - [3.1.8 End of Topic Test - Globalisation & Trade](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-1-8-end-of-topic-test-globalisation-and-trade.md) - [3.1.9 Case Study - Globalisation & Trade](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-1-9-case-study-globalisation-and-trade.md) - 3.2 Exchange Rates - [3.2.1 Floating Exchange Rates](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-2-1-floating-exchange-rates.md) - [3.2.2 Fixed Exchange Rate](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-2-2-fixed-exchange-rate.md) - [3.2.3 Effect of a Stronger & Weaker Dollar](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-2-3-effect-of-a-stronger-and-weaker-dollar.md) - 3.3 The Balance of Payments - [3.3.1 Balance of Payments](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-3-1-balance-of-payments.md) - [3.3.2 Balance of Payments 2](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-3-2-balance-of-payments-2.md) - [3.3.3 FDI & Reducing a BoP Deficit](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-3-3-fdi-and-reducing-a-bop-deficit.md) - 3.4 Economic Integration - [3.4.1 Customs Unions & WTO](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-4-1-customs-unions-and-wto.md) - [3.4.2 Merged Currency](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-4-2-merged-currency.md) - 3.5 Terms of Trade - [3.5.1 Absolute & Comparative Advantage](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-5-1-absolute-and-comparative-advantage.md) - [3.5.2 Gains from Trade](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-5-2-gains-from-trade.md) - [3.5.3 Terms of Trade](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-5-3-terms-of-trade.md) - [3.5.4 IB Multiple Choice - Comparative Advantage & Trade](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-5-4-ib-multiple-choice-comparative-advantage-and-trade.md) - 3.6 Economic Development - [3.6.1 Factors Influencing Growth & Development](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-6-1-factors-influencing-growth-and-development.md) - [3.6.2 International Institutions](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-6-2-international-institutions.md) - [3.6.3 Measures of Development](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-6-3-measures-of-development.md) - [3.6.4 Barriers to Development](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-6-4-barriers-to-development.md) - [3.6.5 Case Study - The Bottom Billion](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-6-5-case-study-the-bottom-billion.md) - [3.6.6 End of Topic Test - Emerging & Developing](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-6-6-end-of-topic-test-emerging-and-developing.md) - 3.7 The Role of Domestic & International Factors - [3.7.1 Interventionist Strategies](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-7-1-interventionist-strategies.md) - [3.7.2 Development Strategies](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-7-2-development-strategies.md) - [3.7.3 Development Promotion Policies](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-7-3-development-promotion-policies.md) - [3.7.4 End of Topic Test - Growth & Global Development](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-7-4-end-of-topic-test-growth-and-global-development.md) - [3.7.5 Application Questions -Growth & Global Development](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-7-5-application-questions-growth-and-global-development.md) - 3.8 The Role of International Trade - [3.8.1 International Institutions](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-8-1-international-institutions.md) - [3.8.2 End of Topic Test - Globalisation & Trade](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-8-2-end-of-topic-test-globalisation-and-trade.md) - 3.9 The Role of Foreign Aid - [3.9.1 Aid](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-9-1-aid.md) - [3.9.2 Limitations of Aid](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-9-2-limitations-of-aid.md) - [3.9.3 Support for Aid](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-9-3-support-for-aid.md) - [3.9.4 Application Questions - Developing Countries](https://senecalearning.com/en-gb/revision-notes/ib-diploma/economics/economics-ib-diploma/3-9-4-application-questions-developing-countries.md)