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Summary Microeconomics I Economics and Business Economics VU University, ISBN: 9781319153960 Microeconomics I (E_EBE1_MICEC) $6.44
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Summary Microeconomics I Economics and Business Economics VU University, ISBN: 9781319153960 Microeconomics I (E_EBE1_MICEC)

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Comprehensive summary of Microeconomics I, a first year course of Economics and Business Economics at the VU.

Last document update: 4 year ago

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Available practice questions

Flashcards 31 Flashcards
$3.21 1 sales

Some examples from this set of practice questions

1.

What are the properties of an indifference curve?

Answer: 1. Downward sloping 2. Never cross 3. The further away from the origin, the higher the utility 4. Every bundle belongs to an indifference curve

2.

What does Microeconomics study?

Answer: 1. The behaviour of individuals and firms 2. Market structures and price settings

3.

What is a Nash Equilibrium?

Answer: A combination of strategies is a Nash Equilibrium if each strategy is a best response to the strategies of the others

4.

What does the Herfindahl-Hirschman Index (HHI) measure?

Answer: It measures the market concentration to determine the degree of competition.

5.

What are \'sunk costs\'?

Answer: Money that has already been spent and which cannot be recovered

6.

What does the Lerner Index measure?

Answer: Market power

7.

What is \'price discrimination\'?

Answer: A selling strategy that charges customers different prices for the same product or service based on what the seller thinks they can get the customer to agree to.

8.

When is welfare maximised in a Monopoly?

Answer: P = MC

9.

What is the government surplus?

Answer: The amount a government receives from taxes minus the amount the government spends on subsidies

10.

What is the calculation for economic profit?

Answer: Economic profit = revenue - economic costs

Microeconomics I summary

Microeconomics has two areas:
1. Analysing the behaviour of individuals and firms
2. Explaining the market structures and price settings

Supply depends on:
- Production technology
- Costs of inputs
- Market price

Demand depends on:
- Preferences of consumers
- Income of consumers
- Market price
- Prices of other goods

Supply > demand  price
Supply < demand  price

Budget is used to:
- Buy consumer goods
- Save (intertemporal decision making)
- Enjoy leisure (labour supply decision)

Assumptions on preferences:
1. Completeness: the consumer prefers one bundle over another or is indifferent
2. Transitivity: bundle A>B, bundle B>C, then the consumer prefers bundle A over C
3. More is better: if a bundle contains all goods of another bundle plus at least one
good more, then the consumer prefers the bundle with more goods over the other

Indifference curve = collection of all bundles of goods for which the consumer is indifferent.
- Non-increasing
- Indifference curves never cross
- Further away from the origin implies a higher utility
- Each bundle belongs to an indifference curve

Utility = the valuation of a bundle to a consumer

Marginal rate of substitution = extent to which goods can be traded against each other
without affecting utility
−∆ q y MU x
MRS= =
−∆ q x MU y
MRS is the derivative of the indifference curve.

When MRS is small, only few additional units of good Y are necessary to replace one unit of
good X.

, MRS = 0 or MRS = ∞ MRS = C




Marginal utility = how much utility increases if the amount of a good in the bundle increases
with one.
 the more is better assumption implies that marginal utility cannot be negative
Marginal utility of good X:
∂ U (q x , q y )
MU x = >0
∂ qx

q y implies that the amount of good Y remains constant.

Budget = p x q x + p y q y ≤ B
Budget line:
p x q x + p y q y =B
1 p
q y = B− x q x
py py

Opportunity set = all bundles (qx, qy) that can be bought with the budget.

Marginal rate of transformation = how much the consumer should sell of good Y to be able
to buy one additional unit of good X within the same budget.
−∆ q y p x
MRT = =
∆ qx py
MRT determines the slope of the budget line.
MRT does not change if the budget increases.
MRT changes if the price of one good changes.

The bundle of goods is optimal if:
1. The bundle lies on the budget line: p x q x + p y q y =B
2. The marginal rate of substitution equals the marginal rate of transformation:
MU x p x
MRS= = =MRT
MU y p y
 this gives the interior solution

Sometimes it gives more utility if you only buy one good (q x =0or q y =0).
 this gives the corner solution

Concave indifference curves always give corner solutions.

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