ECC1000 Chapter Notes - Chapter 1: Marginal Utility, Capital Accumulation, Comparative Advantage

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PRINCIPLES OF MICROECONOMICS (ECC1000) TOPIC SUMMARIES
TOPIC 1 – INTRODUCTION TO MICROECONOMICS
CHAPTER 1 What is economics?
A definition of economics
All economic questions arise from scarcity – from that fact that wants exceed the
resources available to satisfy them
Economics is the social science that studies the choices people make as they cope
with scarcity
Economics can be divided into Microeconomics and Macroeconomics
Two big economic questions
Two big questions summarise the scope of economics:
1. How do choices end up determining what, how, when, where and for whom
goods and services are produced?
2. When do choices made in the pursuit of self-interest also promote the social
interest?
The economic way of thinking
Every choice is a trade-off – exchanging more of something for less of something else
The classic guns-versus-butter trade-off represents all trade-offs
All economic questions involve a trade-off
The big trade-off is between equality and efficiency
The highest-valued alternative forgone is the opportunity cost of what is chosen
Choices are made at the margin and respond to incentives
Economics: a social science
Economists distinguish between positive and normative statements
Economists explain the economic world by building and testing economic models
Economists use the ceteris paribus assumption and careful observation, statistical
tools, and experiments to try to disentangle cause and effect
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