Name Juan-Pierre
Surname Lessing
Student number 57911207
Unique code 655050
Date 1 April 2025
ECS 2601 ASSIGNMENT 1
, QUESTION 1
1.1 In microeconomic we make certain assumptions of consumer preference. We make
these assumptions to analyse and build models.
Assumption 1: Completeness
• This assumption posits that consumers are rational decision-makers who will
always choose the good or service that provides them with the greatest
satisfaction or utility, given their preferences and budget constraints.
Example:
When a consumer chooses what type of phone he/she wants to buy:
• A consumer can always compare and rank different features, price, and other
factors to decide which phone they prefer.
Assumption 2: Transitivity
• This assumption states that if a consumer prefers good A over good B, and
good B over good C, then they must prefer good A over good C. This ensures
consistency in the consumer's preferences.
Example:
• Preference ranking of cakes based on taste.
1.2 Definition of marginal rate of substitution.
In microeconomics, the Marginal Rate of Substitution (MRS) represents the rate at
which a consumer is willing to exchange one good for another without changing their
overall satisfaction level. An indifference curves slope illustrates the trade-off
between two goods in a graph. MRS can also be calculated with the ratio of the
marginal utility/satisfaction of one good to the marginal utility/satisfaction of another.
A consumer will reach the most satisfaction when the MRS is equal to the price ratio
(Equilibrium condition).
When the MRS matches the price ratio, it indicates that the
consumer's readiness to swap one good for another is in perfect alignment with the
market's exchange rate. This guarantees that the consumer is optimizing their
utility within their budget limits. If the MRS exceeds the price ratio, the consumer
will prioritize the good on the horizontal axis more than the indicated price
1.3 Arc elasticity of demand
Used to measure the elasticity of demand over a range of prices instead of a single
point. It calculates the percentage variation in quantity demanded for a specific
percentage change in price between two points on the demand curve.
Example:
Arc elasticity will help to indicate how responsive a demand is to price change when a
product shows an increase in price and the demand decreases in units.
Cross Price Elasticity of Demand
The Cross Price Elasticity of Demand measures how sensitive the demand for one
product is to price changes in another product. It's calculated by comparing the
percentage change in demand for one good to the percentage change in the price of
Surname Lessing
Student number 57911207
Unique code 655050
Date 1 April 2025
ECS 2601 ASSIGNMENT 1
, QUESTION 1
1.1 In microeconomic we make certain assumptions of consumer preference. We make
these assumptions to analyse and build models.
Assumption 1: Completeness
• This assumption posits that consumers are rational decision-makers who will
always choose the good or service that provides them with the greatest
satisfaction or utility, given their preferences and budget constraints.
Example:
When a consumer chooses what type of phone he/she wants to buy:
• A consumer can always compare and rank different features, price, and other
factors to decide which phone they prefer.
Assumption 2: Transitivity
• This assumption states that if a consumer prefers good A over good B, and
good B over good C, then they must prefer good A over good C. This ensures
consistency in the consumer's preferences.
Example:
• Preference ranking of cakes based on taste.
1.2 Definition of marginal rate of substitution.
In microeconomics, the Marginal Rate of Substitution (MRS) represents the rate at
which a consumer is willing to exchange one good for another without changing their
overall satisfaction level. An indifference curves slope illustrates the trade-off
between two goods in a graph. MRS can also be calculated with the ratio of the
marginal utility/satisfaction of one good to the marginal utility/satisfaction of another.
A consumer will reach the most satisfaction when the MRS is equal to the price ratio
(Equilibrium condition).
When the MRS matches the price ratio, it indicates that the
consumer's readiness to swap one good for another is in perfect alignment with the
market's exchange rate. This guarantees that the consumer is optimizing their
utility within their budget limits. If the MRS exceeds the price ratio, the consumer
will prioritize the good on the horizontal axis more than the indicated price
1.3 Arc elasticity of demand
Used to measure the elasticity of demand over a range of prices instead of a single
point. It calculates the percentage variation in quantity demanded for a specific
percentage change in price between two points on the demand curve.
Example:
Arc elasticity will help to indicate how responsive a demand is to price change when a
product shows an increase in price and the demand decreases in units.
Cross Price Elasticity of Demand
The Cross Price Elasticity of Demand measures how sensitive the demand for one
product is to price changes in another product. It's calculated by comparing the
percentage change in demand for one good to the percentage change in the price of
