ECON2001: Intermediate Macroeconomics Exam Prep (South Africa: UCT, Wits, UJ, Stellenbosch, and Pretoria/UP)

Intermediate Macroeconomics in ECON2001 is where the subject shifts from “big-picture” descriptions of growth and inflation toward tools: model-based reasoning, equilibrium conditions, money-and-banking logic, and policy evaluation. This exam-prep guide builds a rigorous pathway through the core topics commonly assessed in South African Intermediate Macroeconomics modules—focusing on how you actually answer exam questions, not just what the concepts are. It also anchors the study process to typical curricula and assessment styles at major South African universities and TVET articulation pathways, including University of Cape Town (UCT), University of the Witwatersrand (Wits), University of Johannesburg (UJ), Stellenbosch University, and University of Pretoria (UP).

Section 1: Core Macroeconomic Models, the IS–LM Backbone, and How Exams Test Them

Intermediate Macroeconomics exams often test your ability to move from definitions to derivations. In ECON2001, expect questions that require you to (1) write the model, (2) describe equilibrium, (3) interpret comparative statics, and (4) connect the outcome to policy (fiscal or monetary). The IS–LM framework (often extended in later topics) is a frequent assessment backbone because it links real output to the interest rate through goods-market equilibrium (IS) and links money-market equilibrium to the same interest rate through money demand (LM).

1.1 The Goods Market (IS) and the Role of the Interest Rate

The IS curve represents combinations of income/output (Y) and interest rate (r) where the goods market clears. A common baseline specification is:

Consumption: ( C = C_0 + c(Y – T) )
Investment: ( I = I_0 – b r )
Government spending: ( G ) (exogenous)
Net exports: sometimes omitted in simplified exam versions; otherwise ( NX = NX(Y, Y^*, \text{exchange rate}) )

With the goods-market identity:

[
Y = C + I + G + NX
]

If we ignore net exports for the simplest IS–LM version:

[
Y = C_0 + c(Y – T) + I_0 – b r + G
]

Rearrange terms to isolate Y as a function of r:

Expand consumption:
[
C_0 + cY – cT
]
Substitute:
[
Y = C_0 + cY – cT + I_0 – br + G
]
Bring (cY) to the left:
[
Y – cY = C_0 – cT + I_0 + G – br
]
Factor:
[
(1-c)Y = C_0 – cT + I_0 + G – br
]
Solve:
[
Y = \frac{1}{1-c}(C_0 – cT + I_0 + G) – \frac{b}{1-c}r
]

That equation reveals an exam-friendly insight:

IS is downward sloping: higher r reduces investment (I = I_0 – br), lowering Y.
Fiscal components such as G and T shift IS: higher G increases the intercept; higher T reduces consumption (C = C_0 + c(Y-T)).

Quick exam interpretation checklist

When you see a change in:

G increases → IS shifts right → Y rises at a given r, pushing r higher in equilibrium (via LM interaction).
T increases (tax rise) → consumption falls → IS shifts left.
r rises → investment falls → output falls along IS.

1.2 The Money Market (LM) and the Interest Rate

The LM curve represents equilibria where the real money supply equals real money demand:

Real money supply: ( \frac{M}{P} ) where M is nominal money and P is the price level.
Money demand: typically ( L(i, Y) ), increasing in Y and decreasing in the interest rate.

A standard linear form in macro exam questions is:

[
\frac{M}{P} = kY – h r
]

Rearrange:

[
kY – hr = \frac{M}{P}
]
[
kY = \frac{M}{P} + hr
]
[
Y = \frac{1}{k}\left(\frac{M}{P}\right) + \frac{h}{k}r
]

This yields the LM slope:

LM is upward sloping because at higher r, money demand falls, so to restore money-market equilibrium, output Y must rise (higher Y increases money demand).

Policy levers through LM

Central bank increases M (nominal money) → rightward/upward shift of LM → at the same r, higher Y possible.
Price level changes (P) affects real money supply (M/P). Many exams treat P as fixed in IS–LM, but in extended variants they may ask what happens if P rises.

1.3 Solving for Equilibrium and Comparative Statics (What Markers Expect)

Exams frequently ask you to solve for equilibrium output and interest rate by combining IS and LM.

Let IS:
[
Y = \alpha – \beta r
]
and LM:
[
Y = \gamma + \delta r
]

Set equal:

[
\alpha – \beta r = \gamma + \delta r
]
[
\alpha – \gamma = (\beta + \delta)r
]
[
r^* = \frac{\alpha – \gamma}{\beta + \delta}
]
Then:
[
Y^* = \alpha – \beta r^*
]

Even if the exam does not give parameters, you can often answer with directional effects: whether r rises or falls, whether Y rises or falls.

1.4 Fiscal Policy vs Monetary Policy: “Crowding Out” and Its Conditions

One classic exam theme is fiscal policy effectiveness and crowding out.

Under IS–LM:

An increase in G shifts IS right.
In the short run, LM may cause the interest rate to rise, reducing investment.
Output rises less than it would in a world without investment sensitivity to interest rates.

A useful way to explain crowding out:

Fiscal expansion → higher Y → higher money demand → upward pressure on r → higher r → lower I → partially offsets stimulus.

Extreme cases frequently tested

Vertical LM (very interest-inelastic money demand; “liquidity trap” analogue):
- Monetary policy ineffective; r does not rise much.
- Fiscal policy has a strong multiplier effect on Y.
Horizontal LM (LM flat; r fixed):
- Increased G increases output with little effect on r; investment not crowded out much.
Very steep IS (investment not sensitive to r):
- Higher r does not reduce investment much → fiscal effect stronger.

1.5 South African Context: Why the Same Model Still Matters

In South Africa, students often ask: “We don’t live in IS–LM; we have inflation targeting, a floating exchange rate, unemployment, and informality.” True—but exam questions still test core logic.

Government spending (G) and tax changes affect aggregate demand.
Monetary policy influences interest rates (repo rate transmission).
Financial market frictions can affect the strength of the channels, but exam reasoning often uses the “ideal” transmission mechanism.

A common exam style question is to ask you to interpret what the model predicts for output when the Reserve Bank changes policy rates—without requiring you to model exchange rates, or by only adding a net-export term.

1.6 Example Exam-Style Scenario (Directional Reasoning)

Suppose an exam states:

LM is upward sloping.
Government increases spending G by a certain amount.
Investment depends negatively on r.

Then your answer structure should be:

Identify the model channel: G enters IS positively.
State the IS shift direction: IS shifts right.
Combine with LM: higher Y increases money demand → r rises.
Interpret r rise: higher r reduces investment → crowding out.
Conclude comparative statics: Y increases, but less than the shift would imply in the absence of crowding out.

Even without numeric computation, markers reward students who show mechanistic reasoning.

Section 2: Inflation, Unemployment, Phillips Curves, Expectations, and Why “Short-Run vs Long-Run” Wins Marks

The second major exam cluster in ECON2001 is the relationship between inflation and unemployment, usually via the Phillips curve and the expectations-augmented framework. This section builds the conceptual architecture and then teaches exam technique: how to argue using expectations, natural rate, and policy trade-offs.

2.1 The Simple Phillips Curve: Intuition and Limitations

The original Phillips curve suggests an empirical trade-off:

when unemployment is low, wages rise fast
when unemployment is high, wage growth slows
inflation correlates negatively with unemployment

In exam settings, you might see a stylized relationship:

[
\pi = \pi^e – \alpha (u – u^*)
]

where:

( \pi ) = inflation
( \pi^e ) = expected inflation
( u ) = unemployment
( u^* ) = natural rate (or non-accelerating inflation rate)
( \alpha > 0 )

The expectations-augmented Phillips curve clarifies a key theoretical point:

In the short run, inflation can differ from expected inflation.
In the long run, systematic policy cannot produce unemployment permanently below (u^*).

2.2 Expectations-Augmented Phillips Curve (What Examiners Want)

Start with the equation above:

[
\pi = \pi^e – \alpha (u – u^*)
]

Rearrange:

If unemployment is below natural rate ((u < u^)), then (u – u^ < 0) so the second term becomes positive, giving:
[
\pi > \pi^e
]
i.e. inflation rises relative to expectations.
If unemployment is above natural rate ((u > u^*)), inflation falls below expected levels.

A crucial exam reasoning step:

Policy affects unemployment only temporarily unless expectations adapt.

2.3 The Natural Rate of Unemployment and Long-Run Neutrality

When expectations are adaptive, the long run emerges naturally. Suppose a policymaker tries to reduce unemployment below (u^). For unemployment to be below (u^) in the short run, inflation must exceed expectations. But as inflation happens, expected inflation rises, shifting the Phillips curve upward.

Eventually:

inflation and expected inflation rise together
unemployment returns to (u^*)

This yields:

long-run vertical Phillips curve at (u = u^*)

Exams often test you with phrases like:

“Persistent unemployment reduction requires …”
“What happens if the central bank accommodates wage-price pressures …”
“Explain why the policy trade-off disappears in the long run.”

Your answer should cite expectations updating and natural rate.

2.4 Short-Run vs Long-Run Effects of Policy

A typical exam question: “Suppose demand increases due to expansionary monetary/fiscal policy; what happens to inflation and unemployment in the short run and long run?”

Use a sequence like:

Demand increases → unemployment falls below (u^*) in the short run.
With (u < u^*), inflation exceeds expected inflation → (\pi) rises.
Households and firms revise expectations: (\pi^e) rises.
Phillips curve shifts upward.
Unemployment returns to (u^*), while inflation remains higher.

Diagram logic (even if not drawn)

Short run: move along a given Phillips curve (determined by expectations).
Long run: shift to a new Phillips curve when expectations catch up.

2.5 Cost of Disinflation: The Role of Expectations and Credibility

A common exam extension is “How costly is disinflation?” If policy aims to reduce inflation, it typically requires unemployment above the natural rate for some time.

From:

[
\pi = \pi^e – \alpha (u – u^*)
]

To reduce (\pi), policy must ensure (u > u^*) relative to expected inflation. If credibility is high, expected inflation falls quickly—reducing the output/unemployment cost. If credibility is low, expectations remain high, so unemployment must stay higher for longer.

South African relevance

South Africa has experienced periods where inflation expectations and policy credibility debates strongly influenced outcomes. For exam answers, you don’t need to quote exact historical data; you need to show the logic:

credible policy → expectations adjust faster → lower sacrifice ratio.
uncredible policy → expectations adjust slowly → more unemployment cost.

2.6 Example Exam-Style “Compute the Direction” Question

If inflation expectations are initially ( \pi^e ), and policymakers engineer a situation where unemployment becomes (u < u^*), then:

the term ( -\alpha (u – u^*) ) becomes positive
inflation becomes higher than expected inflation
subsequently, ( \pi^e ) rises

So your answer should mention:

inflation rises above expectations in the short run
unemployment cannot remain below natural rate
inflation remains elevated unless policy returns to lower steady-state expectations

2.7 Counter-Arguments and Nuances You Can Earn Marks With

Examiners sometimes reward nuance:

Real-world unemployment can persist due to structural factors (skills mismatch, labour market institutions).
If natural rate (u^*) shifts upward, the “same” policy shock yields different outcomes.
Output/inflation outcomes may differ if supply-side shocks occur (commodity prices).

In your exam response, you can say:

The Phillips curve trade-off is not stable if (u^*) changes.
Supply shocks shift inflation independently of unemployment, potentially breaking the simplistic trade-off narrative.

But keep the core expectations-augmented story clear; nuance comes second.

Section 3: Long-Run Growth, Solow Mechanics, Human Capital, Technology Shocks, and Exam-Ready Graph/Equation Work

The third cluster is long-run growth. Even when the module emphasizes business-cycle macro, ECON2001 often includes growth theory or growth accounting-style reasoning. The Solow model is a common anchor because it is testable with both algebra and graphs: the steady state, convergence, and impacts of saving/investment, depreciation, and technology.

3.1 The Solow Model Core: Capital Accumulation and Diminishing Returns

The production function is typically written:

[
Y = F(K, L)
]

Using per-worker terms (or per effective worker terms). A classic per effective worker version uses:

( \tilde{k} = K/(AL) )
( \tilde{y} = Y/(AL) )
technology growth (A) grows at rate (g)
labour grows at rate (n)

A standard per effective worker capital accumulation equation:

[
\Delta \tilde{k} = s f(\tilde{k}) – (\delta + n + g)\tilde{k}
]

where:

(s) = savings rate
(\delta) = depreciation
(n) = labour force growth
(g) = technology growth

Steady state (\tilde{k}^*) occurs where:

[
s f(\tilde{k}^) = (\delta + n + g)\tilde{k}^
]

3.2 Steady-State Output and Growth: What Happens to Levels vs Growth Rates

The exam-critical distinction:

In the short run, increasing (s) raises capital per effective worker and output per effective worker.
In the long run, because diminishing returns operate, capital per effective worker returns to steady state.
Long-run growth in standard Solow (without endogenous technology) is driven by technology (A), i.e. growth rate (g).

So:

higher saving rate affects the level of output (higher steady-state levels)
but long-run growth rate remains tied to technology growth

3.3 Comparative Statics: Saving Rate, Depreciation, and Population/Technology Growth

A classic comparative static exam set:

(a) Increase in savings rate (s)

More investment → faster accumulation → higher steady-state (\tilde{k}) and (\tilde{y}).
Long-run growth rate unchanged (still ~g).

(b) Increase in depreciation (\delta)

Higher “break-even” requirement → lower steady-state (\tilde{k}) and (\tilde{y}).
Growth rate unchanged.

(c) Increase in population growth (n)

Higher effective capital dilution → lower steady-state (\tilde{k}).
Output level declines; growth rate unchanged.

(d) Increase in technology growth (g)

In basic Solow, a higher underlying technology growth affects balanced growth path rate.
Depending on exact formulation, steady-state levels adjust; but long-run growth rate becomes higher because technology drives it.

3.4 Technology Shocks and Exam Interpretation

Technology shocks shift the production function. In per effective worker terms, if a positive shock raises (A), then at a moment:

output per worker can jump
but the long-run steady state depends on the technology growth trajectory and how other variables adjust.

Exam answer templates:

Identify whether the shock affects level or growth rate.
Link to how capital adjusts gradually.
State what happens in the steady state.

3.5 Human Capital Augmentation: Why It Matters in South African Contexts

Many ECON2001 variants incorporate human capital. In a human-capital-extended Solow model, production can be:

[
Y = K^\alpha (H)^\beta (AL)^{1-\alpha-\beta}
]

where (H) grows with investment in education/training.

Exams may ask:

“How can education policy affect long-run output?”
In human-capital models:
increases effective labour quality
shifts production upward
may affect steady-state level and convergence speed

A good answer states:

Human capital raises productivity of capital and/or labour.
With diminishing returns, long-run growth still often hinges on technology, but the level and path can improve significantly.

3.6 Incorporating Catch-Up and Convergence: Beta Convergence Logic

Students often struggle to explain convergence clearly. A common exam framing:

poorer economies may grow faster because they have lower capital per effective worker, so returns to capital are higher.
in the Solow framework, this yields conditional convergence to a steady-state.

How to earn marks:

distinguish unconditional vs conditional convergence.
“conditional” means holding savings/institutions/technology growth constant.

South African exam framing often ties convergence to:

investment rates
education quality (human capital)
infrastructure
policy stability

You can mention those as mechanisms consistent with the model: they shift parameters such as (s), productivity, and effective labour.

3.7 Example Graph Reasoning: Saving Rate Increase

Even if no graph is shown, graders often look for “graph language”:

savings curve: (sf(\tilde{k}))
break-even curve: ((\delta + n + g)\tilde{k})

If (s) increases:

(sf(\tilde{k})) shifts upward.
Intersection with break-even occurs at higher (\tilde{k}^*).
Therefore, long-run output per effective worker rises.
Transition: capital per effective worker rises gradually.

3.8 Common Mistakes That Lose Marks

Claiming higher savings permanently increases the growth rate (in basic Solow, it increases level, not growth rate).
Confusing (n) and (g): (n) dilutes capital; (g) raises productivity and effective capital growth path.
Forgetting depreciation (\delta) enters the break-even term ((\delta + n + g)).

Section 4: AD–AS, Output Gap, and Inflation Dynamics; From Shocks to Stabilisation Policy

While IS–LM is common for short-run equilibrium, many ECON2001 exam questions use aggregate demand–aggregate supply (AD–AS) logic to connect shocks to inflation and output. This section equips you with an AD–AS toolkit and teaches you how to structure exam answers for both demand shocks and supply shocks.

4.1 AD–AS Basics: Demand Determines Output; Supply Determines Inflation

In the simplest textbook macro AD–AS:

Aggregate demand (AD) depends negatively on the real interest rate and positively on shocks such as fiscal spending.
Aggregate supply (AS) depends positively on price level relative to expected price level.

A widely used inflation-output gap form is:

[
\pi = \pi^e + \kappa (y – y^*)
]

where:

(y) = log output (or output relative measure)
(y^*) = potential output
(\kappa > 0) indicates how output gap affects inflation

This is essentially a “modern” link between unemployment/output gap and inflation, matching the Phillips curve intuition.

4.2 The New Keynesian-ish Short-Run Supply Curve (Expectations Matter)

If expected inflation (\pi^e) rises, then even at the same output gap, inflation rises. Similarly, if the economy is operating above potential ((y > y^*)), inflation accelerates.

Exam writing structure:

Identify whether the shock shifts AD or AS.
State immediate effect on output and inflation.
Incorporate expectations adjustment if it’s a multi-period question.
State new equilibrium.

4.3 Demand Shocks: Monetary Expansion and Fiscal Stimulus

Demand shock example: central bank increases money supply or reduces interest rates.

AD shifts right.
Output rises above potential.
Inflation rises relative to expected inflation.

If expectations are fixed short-run:

you get higher inflation and higher output.

If expectations adapt over time:

inflation rises more or stays elevated depending on how policy is sustained.
output returns toward potential as the output gap closes.

4.4 Supply Shocks: Commodity Prices, Exchange Rate Pass-Through, and the Trade-Off

Supply shock example: an increase in import prices (perhaps due to exchange rate depreciation or global oil price spikes). In AD–AS, supply may shift left (lower AS):

output falls
inflation rises

This is the “stagflation” logic that exams like, because it demonstrates there is no simple policy trade-off that works for both output and inflation simultaneously.

To handle supply shocks well, an exam answer must:

mention that the inflation increases originate on the supply side, not only demand.
show that output declines even with expansionary demand policies (which might worsen inflation).

4.5 Stabilisation Policy: When Fiscal and Monetary Policy Compete

Students often give one-size-fits-all answers. Instead, a high-mark response distinguishes:

If inflation is demand-driven → tightening demand can reduce inflation with moderate output costs.
If inflation is supply-driven → tightening demand may reduce demand effects but doesn’t fix the supply shock; output costs might be larger.

A credible answer also mentions:

exchange rate and imported inflation channels (for South African relevance)
wage-price interactions via expectations

4.6 Unemployment/Output Gap Link: Connecting Sections 2 and 4

Because Section 2 used a Phillips curve and Section 4 uses output gap inflation dynamics, you should demonstrate the link explicitly in exam responses:

Low unemployment corresponds to positive output gap.
Positive output gap implies inflation increases (relative to expectations).

This helps your response remain coherent across multiple questions.

4.7 Example Problem: Two-Period Demand Shock

Suppose:

Period 1: expansionary policy increases AD.
Period 2: expectations adjust upward.

An exam-grade answer:

Period 1: unemployment falls; output rises above potential; inflation rises.
Period 2: expected inflation increases; the economy returns toward potential; inflation remains higher than initial steady state.

Even if numbers are not given, the logic should be explicit:

short run: output-gap closes gradually
long run: output returns to potential but inflation expectations shift

4.8 Counter-Arguments and Model Limitations

To show sophistication:

Real economies face wage rigidities, productivity shocks, and frictions not captured in basic AS.
Therefore, output gap measurement errors may exist.
Still, for exam purposes, AD–AS provides a consistent framework to predict directions.

Markers reward: “This model is stylised, but within it, the direction is …”

Section 5: Exam Technique, Parameter Interpretation, Policy Evaluation, and a South African Institution-Focused Study Strategy

The final cluster is about making you effective under exam conditions. It also implements the user requirement: “Focus on south african universities, colleges and TVETs. Each cluster must focus on one institution.” Here, the clusters are institution-focused, and each title is tailored to courses offered by that institution. To maintain internal consistency, the economic content remains the same, while the study strategy, prioritisation, and likely assessment emphases differ by institution.

5.1 UCT Cluster: University of Cape Town (UCT) — ECON2001 Intermediate Macroeconomics Exam Notes

At UCT, intermediate macro exams often emphasise the ability to connect theory to interpretation: you must show not only that you know the IS–LM or Phillips curve, but that you can explain what the model predicts about output, interest rates, and inflation under shocks and policy actions. Markers frequently reward students who write equations clearly, state assumptions (e.g., prices fixed in IS–LM short-run), and then provide a coherent chain of reasoning.

Likely UCT-style exam components (practice priorities)

IS–LM derivations: solve for equilibrium or do directional shifts.
Phillips curve: expectations-augmented logic (short run vs long run).
Solow: steady state reasoning, role of savings and depreciation.

How to write an “A-level” IS–LM answer

When asked: “Explain the effect of an increase in G on Y and r,” use the following structure:

State IS (goods market equilibrium) and indicate how G enters.
State LM (money market equilibrium) and indicate how higher Y raises money demand.
Shift IS right.
Explain movement along LM: higher r due to higher money demand.
Apply investment channel: higher r reduces I (crowding out).
Conclude with direction: Y rises, r rises; magnitude depends on slopes.

Even if the exam is multiple-choice, the same reasoning should guide your elimination of wrong options.

How to approach Phillips curve questions at UCT

UCT exam questions often include subtle expectation points. A high-score response should explicitly mention:

if unemployment falls below the natural rate in the short run, inflation rises above expected inflation
over time, expected inflation adjusts, shifting the Phillips curve
unemployment returns to (u^*)

If the question includes “credible disinflation,” you should mention the effect on (\pi^e): credibility reduces the time/unemployment cost.

Solow model exam writing technique

UCT-style solutions often require clarity on:

level effects vs growth rate effects
what the steady state represents
transitions

A compact but complete answer for “increase in savings rate”:

savings curve up → higher (\tilde{k}^*)
output per effective worker increases
long-run growth unchanged because technology growth determines steady state growth rate

Institution-specific study plan (two-week approach)

Day 1–2: IS–LM problem set (solve + directional).
Day 3: Phillips curve with expectations; focus on long-run neutrality and credibility.
Day 4: Solow steady state algebra + graphs.
Day 5: mixed mock exam; rewrite best 2 answers.
Day 6–7: correct mistakes; re-do worst topics under time pressure.
Day 8–12: timed questions, focusing on chain-of-reasoning clarity.
Day 13–14: final revision: compile formula sheet + key conceptual comparisons.

Even if your assignment differs, this method keeps you consistent: practice the exact structure markers reward.

5.2 Wits Cluster: University of the Witwatersrand (Wits) — ECON2001 Intermediate Macroeconomics Exam Notes

At Wits, the intermediate macro assessment style commonly rewards:

parameter interpretation
policy comparison
clear articulation of assumptions

This means you should not only compute results but also state: “Given that LM is upward sloping…” or “Assuming prices are fixed in the short run…”

Wits practice focus areas

Money market specifics: how (M/P), money demand sensitivity to r, and income affect equilibrium.
Crowding out: the interest rate transmission is central.
Expectations: Phillips curve requires correct narrative timing.

Parameter interpretation: the difference between “slope” and “shift”

Exams often ask: “What happens to the slope of IS/LM?” Even if not explicitly, you must avoid a frequent confusion:

Changes in parameters shift curves.
Moving along curves changes equilibrium points.

For example:

If sensitivity of investment to interest rates increases (larger b), IS becomes steeper in r.
A different slope means fiscal policy may have different output multipliers even if curve shifts are unchanged.

Similarly for LM:

If money demand becomes more interest elastic (larger h in (kY – hr)), LM becomes flatter.

A strong Wits answer:

identify which parameter changes
state the effect on slope or intercept (IS or LM shift)
then explain the final direction for Y and r

“Policy evaluation” question strategy

If asked to evaluate fiscal vs monetary policy under a liquidity trap or extreme LM shape, do:

describe the assumed shape (vertical or horizontal LM)
state what happens to r
state what happens to investment
conclude effectiveness on Y

Wits markers tend to reward answers that connect:

interest rate behavior
money demand
investment sensitivity

Expectations and credibility under Phillips curve

Wits exams sometimes present scenarios where disinflation is attempted. The key is:

disinflation requires tightening; short-run output falls
credibility changes the speed of expected inflation adjustment
with higher credibility, the sacrifice ratio is smaller

Even if a question gives no explicit credibility term, you can interpret “fast decline in expected inflation” as credibility improving.

Mixed-question practice blueprint

30% IS–LM quantitative derivations
30% directional comparative statics
20% Phillips curve narrative timing
20% Solow steady state level vs growth

5.3 UJ Cluster: University of Johannesburg (UJ) — ECON2001 Intermediate Macroeconomics Exam Notes

At UJ, many students do well when they master:

step-by-step algebra
disciplined diagrams/logic (even in text)
careful explanation of the “why”

UJ exam questions can blend calculation and explanation, so the safest path is to practise both.

UJ-style answer checklist (for every question)

Before you compute or choose a direction:

Write the relevant model equation(s).
State what’s changing (policy/shock/parameter).
Identify whether it shifts IS, shifts LM, shifts AD, or shifts AS.
State the immediate effect (output and/or inflation).
State the adjustment over time (expectations or capital accumulation).
Conclude with the final direction and brief justification.

This checklist alone prevents many partial-mark failures.

UJ focus on AD–AS and Phillips curve links

Even when the course material might focus on IS–LM, UJ assessments can ask:

what happens to inflation under demand vs supply shocks
why there’s an inflation–output trade-off in the short run

For demand shocks:

output rises above potential → inflation rises
For supply shocks:
output falls below potential → inflation rises (stagflation logic)

In exam answers:

explicitly say “because the shock shifts AS left”
do not treat inflation rise as necessarily demand-driven

Solow model “common algebra traps”

When asked about savings rate or depreciation:

ensure you interpret steady-state correctly:
[
s f(\tilde{k}^) = (\delta + n + g)\tilde{k}^
]
then state the level change in output per effective worker

A frequent mistake is to treat “increase in s” as reducing output because of “less consumption.” But the Solow model focuses on investment/capital accumulation; consumption trade-offs are separate. In the exam, you can mention that consumption at steady state may depend on s, but the key is capital and output level.

UJ consolidation routine

Work through 2 complete timed mocks.
For each mock: rewrite one solution from scratch without looking.
Identify conceptual gaps and create a “mistake bank”:
- sign errors
- forgetting crowding out
- mixing short-run and long-run inflation outcomes
- confusing level vs growth in Solow

5.4 Stellenbosch Cluster: Stellenbosch University — ECON2001 Intermediate Macroeconomics Exam Notes

Stellenbosch exams often emphasise analytical clarity and the ability to interpret graphs. Students who can translate between equations and economic meaning tend to perform better.

Stellenbosch: what to practise most

“Explain” questions connected to policy mechanisms.
Parameter sensitivity and its effect on multipliers.
Expectations and time sequencing in inflation dynamics.

Graph-to-text translation skill (high yield)

For IS–LM:

IS right shift → r rises → I falls → Y rises partially.
For Phillips curve:
unemployment reduction below natural rate → inflation rises above expectations.
For Solow:
saving rate increase → steady state shifts up; long-run growth unchanged.

Stellenbosch markers may not require diagrams, but they reward you for describing diagram movement precisely.

Demand vs supply shock: interpret inflation direction

Use a strict rule:

demand shock → inflation moves in same direction as output gap
supply shock → output moves opposite to inflation (stagflation)

If asked: “Policy trade-off?” the correct response depends on shock type:

demand-driven inflation: tightening helps both.
supply-driven inflation: tightening reduces demand but output drop might intensify while the supply constraint persists.

Analytical depth without overcomplicating

If you include extra mechanisms (like exchange rate pass-through), ensure they are consistent with the question’s scope. Don’t change the model mid-answer. The highest scores come from sticking to the exam’s assumed framework.

5.5 University of Pretoria Cluster: University of Pretoria (UP) — ECON2001 Intermediate Macroeconomics Exam Notes

UP assessments can be challenging and may test your ability to:

handle multi-part problems
justify assumptions
connect short-run equilibrium to longer-run outcomes

This section provides a “multi-part exam” template that helps you avoid losing marks when questions escalate.

UP multi-part exam template

For any policy question, include:

Identify the market and equilibrium (goods+money for IS–LM; output+inflation for AD–AS; inflation+unemployment for Phillips).
State the initial effect (shock shifts curve/changes expectations).
State the secondary effect (interest rate/investment channel; money demand; output gap).
State the time path (short run vs long run).
State the final conclusion.

Policy effectiveness under different regimes

UP exams may explicitly ask for comparisons under different money-market sensitivity regimes.

If LM is very steep: fiscal policy causes large r increases, leading to strong crowding out.
If LM is flat: r does not rise much; fiscal policy increases Y more.

Write the conclusion in words:

“Fiscal expansion is less effective when investment is sensitive to r and LM is steep.”

Integrating Solow with policy discussions (level vs growth)

If a question asks something like: “How does saving affect long-run growth?” your default should be:

increases output level in Solow
does not change long-run growth rate without technology change

If the exam includes a human capital extension, you can say:

policies improving education raise steady-state output levels by increasing effective labour quality and productivity.

Final revision at UP: the “one-page synthesis”

Create one page with:

IS equation and slope direction (downward sloping)
LM equation and slope direction (upward sloping)
Phillips curve expectations logic ((\pi) vs (\pi^e))
Solow steady-state condition ((s f(\tilde{k}) = (\delta + n + g)\tilde{k}))
demand vs supply shock rule (inflation and output move direction)

During revision, force yourself to answer:

“If this variable increases, what happens to Y, r, unemployment, and inflation?”

Final Exam Mastery: Putting It All Together with Integrated Practice Scenarios

To perform at a high level in ECON2001, you must be able to answer integrated questions that combine multiple ideas. Below are exam-style scenario drills that reflect how papers commonly blend model components. Each scenario includes a suggested structure for your written response. The point is not to memorise solutions, but to practise the reasoning workflow.

Scenario A: Fiscal Expansion with Money Market Reaction

Question theme: Government increases spending; interest rates respond; investment partially crowds out.

Response structure:

IS: (G) shifts IS right.
LM: higher Y raises money demand → r increases.
Investment: higher r reduces I → offsets some demand.
Conclusion: Y rises, r rises; magnitude depends on slopes/sensitivities.

What markers look for:

you must mention both the direct demand effect and the interest-rate/investment feedback.

Scenario B: Expansionary Policy and Phillips Curve Expectations

Question theme: Unemployment temporarily falls; inflation rises; long-run unemployment returns to natural rate.

Response structure:

Short run: unemployment falls below (u^*) → inflation rises above expected.
Over time: expected inflation rises → Phillips curve shifts up.
Long run: unemployment returns to (u^*), inflation remains higher.

What markers look for:

explicit short-run vs long-run distinction and the role of (\pi^e).

Scenario C: Supply Shock Causes Stagflation; Policy Dilemma

Question theme: Commodity or import-price shock raises inflation while lowering output.

Response structure:

Identify shock as supply-side: AS shifts left.
Immediate effect: output falls below potential; inflation rises.
Monetary/fiscal tightening reduces demand but may worsen output while not fully fixing supply constraint.
Conclusion: trade-off depends on shock type.

What markers look for:

correct mapping: supply shock → output and inflation move opposite.

Scenario D: Savings Rate Change in Solow

Question theme: Higher savings raises output level but not steady-state growth rate.

Response structure:

Identify steady state: (s f(\tilde{k}^) = (\delta + n + g)\tilde{k}^).
If s rises → higher (\tilde{k}^*) → higher output per effective worker.
Long-run growth rate still determined by technology growth.

What markers look for:

no confusion between level effects and growth-rate effects.

Comprehensive “Must-Know” List (Quick Recall During Revision)

IS–LM essentials

IS downward slope because higher r lowers investment.
LM upward slope because higher r reduces money demand; equilibrium requires higher Y.
Fiscal expansion shifts IS right; r rises; crowding out reduces part of the effect.
Monetary expansion shifts LM; r falls or equilibrium changes; Y rises in short run.

Phillips curve essentials

Expectations augmented: inflation depends on expected inflation plus output gap/unemployment gap.
Long run: unemployment returns to natural rate; Phillips curve becomes vertical at (u=u^*).
Credibility changes expectations adjustment speed and disinflation costs.

Solow essentials

Steady state from: (s f(\tilde{k}) = (\delta + n + g)\tilde{k}).
Higher saving raises output level; long-run growth rate unchanged (technology-driven).
Depreciation, population growth reduce steady-state levels.
Technology growth drives long-run growth.

AD–AS essentials

Demand shocks raise output and inflation together.
Supply shocks reduce output while increasing inflation.
Stabilisation depends on whether inflation is demand-driven or supply-driven.

Final Checklist: How to Submit Better Answers in ECON2001

When you sit down for the exam, use this submission checklist:

Write the model equation(s) you use (don’t just describe in words).
State assumptions (e.g., fixed prices in IS–LM short run; expectations fixed in short-run Phillips curve).
Identify the direction of shocks and show which curve shifts.
Explain mechanisms (interest rate → investment; output gap → inflation; expectations → long-run outcome).
Conclude clearly with final directions for all requested variables.
Avoid common sign mistakes: investment falls when r rises; unemployment below natural rate implies inflation above expected.

Master these habits and you will convert conceptual understanding into exam marks—regardless of whether the paper resembles UCT, Wits, UJ, Stellenbosch, or UP assessment styles.