© The McGraw-Hill Companies, 2008 Chapter 2 The tools of economic analysis David Begg, Stanley Fischer and Rudiger Dornbusch, Economics, 9th Edition, McGraw-Hill,

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Presentation transcript:

© The McGraw-Hill Companies, 2008 Chapter 2 The tools of economic analysis David Begg, Stanley Fischer and Rudiger Dornbusch, Economics, 9th Edition, McGraw-Hill, 2008 PowerPoint presentation by Alex Tackie and Damian Ward

© The McGraw-Hill Companies, 2008 Models and data Model –a framework based on simplifying assumptions –helps to organize our economic thinking Data –the economist’s link with the real world –time series –cross section

© The McGraw-Hill Companies, 2008 Real and nominal Many economic variables are measured in money terms Nominal values –measured in current prices Real values –adjusted for price changes compared with a base year –measured in constant prices

© The McGraw-Hill Companies, 2008 Diagrams … help to analyse patterns and trends in data

© The McGraw-Hill Companies, 2008 Diagrams (2) … help to analyse patterns and trends in data

© The McGraw-Hill Companies, 2008 Diagrams (3) … help to analyse patterns and trends in data

© The McGraw-Hill Companies, 2008 Economic models: an example To organise our thinking we need a simplified picture of reality focusing on key elements Quantity of tube journeys demanded = f(Prices, income, preferences)

© The McGraw-Hill Companies, 2008 Relationships Diagrams help economists to explore relationships between economic variables

© The McGraw-Hill Companies, 2008 Evidence in economics Scatter diagrams help us to confront economic theory with empirical reality Econometrics takes this further using statistical techniques Evidence may allow us to reject a theory or accumulate support for it