Microeconomics Essay Plans:
Introduction to Microeconomics:
Explain how a production possibility diagram can be used to illustrate some features of the
fundamental economic problem. (15)
Define fundamental economic problem, PPF, opportunity cost
Diagram – PPF and then shifts
P1 – scarcity and Opportunity cost
Chain of analysis:
The PPF is downward-sloping because producing more of Good X requires diverting
resources away from Good Y.
This demonstrates opportunity cost: increasing output of one good means sacrificing
potential output of another.
The concave shape reflects increasing opportunity cost, as resources are not equally
efficient in all uses.
This links directly to scarcity — the economy cannot produce unlimited quantities of both
goods, so choices are unavoidable
P2 – efficiency and growth
Chain of analysis:
Points on the PPF show productive efficiency — all resources fully employed.
Points inside the curve show unemployment or underutilisation, highlighting inefficiency
as part of the economic problem.
An outward shift of the PPF represents economic growth, caused by improved technology or
increased factor inputs.
This shows the trade-off between using scarce resources for current consumption versus
investing for future growth.
Behavioural Economics:
Discuss the view that individual economic agents will always act as rational decision makers so
as to maximise their utility. (25)
Define rational decision making, individual economic agents, utility
P1 – Agree – classical economics
Chain of analysis:
Consumers compare marginal utility per £ across goods and allocate spending to maximise
total utility (equimarginal principle).
Firms maximise profit by producing where MC = MR, showing rational optimisation.
Workers choose jobs based on wage, working conditions, and utility from leisure vs income.
, These predictable behaviours allow markets to allocate resources efficiently and form the
foundation of supply and demand models.
Ev: perfect info rarely exists and cognitive limitations to process info
P2 – Disagree – behavioural economics – bounded rationality
Chain of analysis:
People use heuristics (rules of thumb) to simplify decisions when information is complex or
time is limited.
Examples include choosing familiar brands, sticking to habitual choices, or following social
norms.
This leads to satisficing rather than maximising — choosing an option that is “good enough”
rather than optimal.
Real-world decisions often deviate from rational models due to limited cognitive processing
and incomplete information.
Ev: heuristics can be efficient and lead to near optimal outcomes, education, training and experience
can reduce the impact of biases
Evaluate the view that the consumption of unhealthy foods can best be reduced through the use
of nudges and other techniques from behavioural economics. (25)
Define behavioural econ, nudges, choice architecture, framing
P1 – Nudges
Chain of analysis:
Placing healthier foods at eye level increases salience, drawing attention to better choices.
Changing portion sizes or plate sizes can reduce consumption through default effects.
Social-norm nudges (“most people choose the healthier option”) leverage conformity to
influence behaviour.
These interventions work because consumers rely on heuristics rather than full rational
optimisation, so small environmental changes can shift decisions.
Ev: often produce small, incremental changes rather than large behavioural shifts, effects may fade
in SR as consumers adapt
P2 – choice architecture to change the default option
Chain of analysis:
Making healthier options the default (e.g., smaller drink sizes, fruit instead of fries) reduces
unhealthy consumption without removing choice.
Rearranging menus or supermarket layouts can shift consumption patterns by altering the path
of least resistance.
These tools exploit predictable behavioural tendencies such as inertia, limited attention, and
decision fatigue.
They are low-cost and preserve consumer freedom, making them politically attractive.
, Ev: Effects may be small and short-lived, may not work for high stakes and complex decisions
P3 – Framing to allow anchoring
Chain of analysis:
Presenting nutritional information in a certain way (e.g., “high in sugar” vs “low in fat”) can
shift perceptions of healthiness.
Anchoring effects mean consumers rely heavily on the first piece of information they see,
such as calorie labels or warning messages.
Framing can make long-term consequences more salient (“eating this daily adds 5kg per
year”), helping overcome present bias.
These techniques work because consumers do not process information neutrally; emotional
and cognitive responses shape decisions.
Ev: depends on consumption as if habitual then it won’t make a difference. Can be criticised as
manipulative as could be exploited. Depends on elasticity of demand.
Graphs to use: shifts in demand showing the impact on consumption particularly merit and demerit
goods
Counter argument: other methods are better than behavioural methods like taxation – externality
graph
Price Determination in a competitive market:
Explain how the concept of cross elasticity of demand can be used to understand the
relationship between markets. (15)
Define cross elasticity of demand and include equation.
Types of relationships:
Positive XED → substitutes
Negative XED → complements
Zero XED → unrelated goods
P1 – substitutes
Chain of analysis:
If Good B’s price rises, consumers switch to Good A because it offers similar utility.
This leads to a positive XED, meaning the goods compete in the same market space.
The stronger the positive XED, the closer the substitutes (e.g., Pepsi and Coca-Cola).
Firms use this information to understand competitive pressure and pricing strategies.
Graph – demand for 2 substitutes
P2 – Complements
Chain of analysis:
Introduction to Microeconomics:
Explain how a production possibility diagram can be used to illustrate some features of the
fundamental economic problem. (15)
Define fundamental economic problem, PPF, opportunity cost
Diagram – PPF and then shifts
P1 – scarcity and Opportunity cost
Chain of analysis:
The PPF is downward-sloping because producing more of Good X requires diverting
resources away from Good Y.
This demonstrates opportunity cost: increasing output of one good means sacrificing
potential output of another.
The concave shape reflects increasing opportunity cost, as resources are not equally
efficient in all uses.
This links directly to scarcity — the economy cannot produce unlimited quantities of both
goods, so choices are unavoidable
P2 – efficiency and growth
Chain of analysis:
Points on the PPF show productive efficiency — all resources fully employed.
Points inside the curve show unemployment or underutilisation, highlighting inefficiency
as part of the economic problem.
An outward shift of the PPF represents economic growth, caused by improved technology or
increased factor inputs.
This shows the trade-off between using scarce resources for current consumption versus
investing for future growth.
Behavioural Economics:
Discuss the view that individual economic agents will always act as rational decision makers so
as to maximise their utility. (25)
Define rational decision making, individual economic agents, utility
P1 – Agree – classical economics
Chain of analysis:
Consumers compare marginal utility per £ across goods and allocate spending to maximise
total utility (equimarginal principle).
Firms maximise profit by producing where MC = MR, showing rational optimisation.
Workers choose jobs based on wage, working conditions, and utility from leisure vs income.
, These predictable behaviours allow markets to allocate resources efficiently and form the
foundation of supply and demand models.
Ev: perfect info rarely exists and cognitive limitations to process info
P2 – Disagree – behavioural economics – bounded rationality
Chain of analysis:
People use heuristics (rules of thumb) to simplify decisions when information is complex or
time is limited.
Examples include choosing familiar brands, sticking to habitual choices, or following social
norms.
This leads to satisficing rather than maximising — choosing an option that is “good enough”
rather than optimal.
Real-world decisions often deviate from rational models due to limited cognitive processing
and incomplete information.
Ev: heuristics can be efficient and lead to near optimal outcomes, education, training and experience
can reduce the impact of biases
Evaluate the view that the consumption of unhealthy foods can best be reduced through the use
of nudges and other techniques from behavioural economics. (25)
Define behavioural econ, nudges, choice architecture, framing
P1 – Nudges
Chain of analysis:
Placing healthier foods at eye level increases salience, drawing attention to better choices.
Changing portion sizes or plate sizes can reduce consumption through default effects.
Social-norm nudges (“most people choose the healthier option”) leverage conformity to
influence behaviour.
These interventions work because consumers rely on heuristics rather than full rational
optimisation, so small environmental changes can shift decisions.
Ev: often produce small, incremental changes rather than large behavioural shifts, effects may fade
in SR as consumers adapt
P2 – choice architecture to change the default option
Chain of analysis:
Making healthier options the default (e.g., smaller drink sizes, fruit instead of fries) reduces
unhealthy consumption without removing choice.
Rearranging menus or supermarket layouts can shift consumption patterns by altering the path
of least resistance.
These tools exploit predictable behavioural tendencies such as inertia, limited attention, and
decision fatigue.
They are low-cost and preserve consumer freedom, making them politically attractive.
, Ev: Effects may be small and short-lived, may not work for high stakes and complex decisions
P3 – Framing to allow anchoring
Chain of analysis:
Presenting nutritional information in a certain way (e.g., “high in sugar” vs “low in fat”) can
shift perceptions of healthiness.
Anchoring effects mean consumers rely heavily on the first piece of information they see,
such as calorie labels or warning messages.
Framing can make long-term consequences more salient (“eating this daily adds 5kg per
year”), helping overcome present bias.
These techniques work because consumers do not process information neutrally; emotional
and cognitive responses shape decisions.
Ev: depends on consumption as if habitual then it won’t make a difference. Can be criticised as
manipulative as could be exploited. Depends on elasticity of demand.
Graphs to use: shifts in demand showing the impact on consumption particularly merit and demerit
goods
Counter argument: other methods are better than behavioural methods like taxation – externality
graph
Price Determination in a competitive market:
Explain how the concept of cross elasticity of demand can be used to understand the
relationship between markets. (15)
Define cross elasticity of demand and include equation.
Types of relationships:
Positive XED → substitutes
Negative XED → complements
Zero XED → unrelated goods
P1 – substitutes
Chain of analysis:
If Good B’s price rises, consumers switch to Good A because it offers similar utility.
This leads to a positive XED, meaning the goods compete in the same market space.
The stronger the positive XED, the closer the substitutes (e.g., Pepsi and Coca-Cola).
Firms use this information to understand competitive pressure and pricing strategies.
Graph – demand for 2 substitutes
P2 – Complements
Chain of analysis:
