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About the author
Stephen Holroyd is an experienced economics teacher and has been teaching
the IB for twelve years. He has examined for the IB since 1999 and teaches
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, CONTENTS
ABOUT THIS B O O K ............................................................... ..3
Introduction to Econom ics......................................................4
M icro e co n o m ics.......................................................................7
Dem and.......................................................................... .. 7
S u pply............................................................................. .. 9
Equilibrium .........................................................................10
Government Intervention in the M a rket..........................12
Elasticities of Demand and S u pply........................................ ...17
Price Elasticity of D em and............................................ ..17
Cross Elasticity of D em and............................................. 19
Income Elasticity of D em and...........................................20
Price Elasticity of S u p ply................................................. 20
Market Failure and Government R esponse.............................22
Externalities.......................................................................22
Negative Externalities.................................................... ..22
Positive Externalities..................................................... .. 25
Public G o o d s.................................................................... 27
Merit and Demerit G o o d s................................................26
Monopoly P ow er............................................................. .26
Theory of the Firm .....................................................................29
Aims and Objectives of F irm s................................................. .29
Costs in the Short R u n .....................................................29
Costs in the Long R u n .....................................................30
R evenue......................................................................... ..32
P ro fit................................................................................ ..34
Perfect Competition....................................................... ..35
M onopoly........................................................................ ..36
Perfect Competition and Monopoly C om pared........... ..37
Monopolistic Com petition................................................38
O ligopoly......................................................................... .39
Price Discrimination.................................................... .....40
M a croe co n o m ics......................................................................42
Measuring National Incom e.................................................. ... 42
Circular Flow of Income............................................................ .42
Macroeconom ic M o d e ls ..........................................................43
Macro Policy Objectives................................................ ...43
Aggregate Demand and Supply A nalysis.................... ..44
The Multiplier and Accelerator...................................... ..48
Demand-side and Supply-side Policies...........................49
Unemployment and Inflation.....................................................51
Unemployment............................................................. ....51
Inflation........................................................................ .....53
The Keynesian/Monetarist D ebate............................... .56
International E conom ics.........................................................61
Reasons for Trade......................................................................61
Absolute Advantage...................................................... ..61
Comparative Advantage................................................ .61
T rad el Protectionism.................................................................63
Economic integration..................................................................64
Balance of Paym ents............................................................... .65
Exchange R ate s........................................................................66
Balance of Payments and Exchange R a te s............................69
Terms of Trade....................................................................... ....71
, Development Economics........................................................72
Distinction between Growth and Development.................... ... 72
Characteristics of Economic G ro w th ...................................... ..72
Indicators of Economic Developm ent.......................................73
Sources of Economic Developm ent....................................... ..73
Consequences of Growth......................................................... ..74
Barriers to Economic Growth/Development.............................. 75
Development Strategies.......................................................... ..77
Revision Advice....................................................................... ..83
Examination Technique and Model Answers.................... ..85
Multiple C hoice ............................................................... ..85
E ssays............................................................................ ...86
Short A nsw ers...................................................................87
Data R esponse............................................................... ..92
Acknowledgements
In writing this guide I am indebted to the word-processing skills of
Sophie Holroyd.
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