IB Economics HLTopic 4 — The Global EconomyPaper 1, 2 & 3Evaluation~12 min read
Economic, Political and Social Barriers
The poverty trap explains the mechanism. This page explains what holds it in place. There is a long list, but every country has its own combination — and picking the right two or three from a data extract is the actual exam skill.
📚 What you need to know
Economic barriers include primary sector dependence, inequality, blocked market access, a large informal economy, capital flight, debt and weak infrastructure.
Geography and climate matter: landlocked countries face higher trade costs, and endemic disease cuts productivity.
Political and social barriers include a weak institutional framework, poor governance, unequal power and gender inequality.
The institutional framework covers the legal system, tax structure, banking and property rights.
Barriers are country-specific: the same list applies everywhere, the weighting does not.
Good evaluation means saying which barrier binds hardest here, and why.
Economic barriers
Barrier
What goes wrong
Dependence on the primary sector
Exports concentrated in one or two commodities. Prices swing violently, income elasticity of demand is low, and very little value is added before export
Rising income inequality
A small middle-income band means weak domestic consumption, so aggregate demand and growth stay low even when national income rises
Lack of access to markets
Tariffs and quotas in richer economies shut out exactly the goods low-income countries can produce competitively
A large informal economy
Unrecorded work is untaxed, so government revenue is thin and there is little to spend on infrastructure or merit goods
Capital flight
Money and assets leave rapidly after political upheaval, sanctions or a policy shift, draining the funds available for investment
Indebtedness
Repayments with interest consume revenue that could have funded schools, clinics and roads, and high debt deters new lending
Weak infrastructure and technology
Poor roads, power and telecoms raise business costs and deter foreign investment, which is why infrastructure lending unlocks so much
Low human capital
Weak education and health hold productivity down and keep the production possibility frontier close in
Geography
Landlocked countries pay far more to trade, since sea freight is much cheaper than air. Deserts and mountains cut usable land
Tropical climate and disease
Malaria, dengue and similar diseases reduce the productivity and output of the workforce year after year
Why commodity dependence is so dangerous
This is the barrier most worth understanding properly, because it is pure elasticity theory applied to a real problem. Demand and supply for commodities are both price inelastic, so tiny shifts produce enormous price swings.
Draw the curves steep and the shift small. Students who draw gently sloping curves accidentally show the opposite of what they are trying to argue.
🧩 The three separate problems with primary exports
Price volatility. Inelastic demand and supply mean government revenue lurches from year to year, making planning almost impossible.
Low income elasticity of demand. As the world gets richer it does not buy proportionally more copper or cocoa, so the long-run growth in demand is weak.
Little value added. The profit sits in processing and manufacturing, which happens somewhere else.
Point two is the one that separates good answers. Volatility is a short-run problem you could insure against. Low income elasticity is structural: it means that even a perfectly stable commodity market would still leave you falling behind the rest of the world.
Political and social barriers
Institutions are the multiplier. A country with sound courts, banks and property rights turns aid, investment and reform into results. One without turns them into leakage.
Institution
What it enables
What happens without it
Legal system
Contracts that hold, clear boundaries for firms and households, confidence to invest
Overseas investors stay away and domestic firms stay small and informal
Tax structure
Revenue for merit and public goods, and redistribution through progressive rates
Weak collection means the progressive design never reaches the people it was meant to help
Banking system
Savings turned into loans, so firms and households can invest
The growth loop of the poverty trap cannot start turning
Property rights
Land and housing usable as collateral, and secure enough to be worth improving
Households cannot borrow against their main asset, and have no reason to invest in it
Governance, power and gender
Poor governance means resources are allocated badly and money intended for investment is diverted, so projects deliver far less development than they cost. Unequal political power shows up where workers have little bargaining strength, which makes low wages easier to sustain and inequality worse. Gender inequality reduces the incentive for women to enter the workforce, which shrinks the productive potential of the whole economy — a smaller production possibility frontier for no good reason.
Frame gender inequality as an efficiency loss, not only a fairness one. Excluding half the potential workforce from higher-productivity work means the economy operates inside its frontier permanently. That is an economics argument, and it scores better.
Worked examples
WORKED EXAMPLE 1
Copper makes up 70% of a country’s export earnings. The world copper price falls 30%. Calculate the effect on total export earnings and explain why this is a barrier to development. [4]
Step 1: the calculation0.70 × 30% = 21%, so total export earnings fall by roughly a fifth.
Step 2: the immediate consequence
Export revenue and government tax receipts both fall sharply, worsening the current account and cutting funds for development spending.
Step 3: why it is a barrier
The fall was caused by world market conditions the country cannot influence. Planning multi-year investment on income this unstable is close to impossible.
A 21% fall in export earnings from a single price movethis assumes volumes are unchanged, which is reasonable when supply is inelastic in the short run
WORKED EXAMPLE 2
World income rises 10%. A country’s main export has a YED of 0.3; a neighbour exports manufactured goods with a YED of 1.8. Compare the effect on each country’s exports. [4]
Step 1: the primary exporter0.3 × 10% = 3% rise in quantity demanded.
Step 2: the manufacturer1.8 × 10% = 18% rise in quantity demanded.
Step 3: interpret
Global growth pulls the manufacturing economy along six times faster. The commodity exporter gains far less from the same world boom.
Step 4: the implication
This is the structural case for diversification into higher value-added goods, not just for stabilising commodity prices.
3% against 18% — the gap widens automatically over time
💡 Exam tip
In data-response, read the extract for barriers before you read the questions. Two or three will be signposted.
Do not list all ten. Pick the ones the extract supports and develop them properly.
Use elasticity language for commodity dependence — PED for volatility, YED for the long-run problem.
Say which barrier you think binds hardest and justify it. That is the evaluation mark.
Link barriers back to the poverty trap diagram wherever you can.
⚠ Common mix-up
Volatility and low YED are different problems. One is short run, one is structural.
Capital flight is not the same as a trade deficit. It is money leaving the financial account.
A large informal economy is not only a tax problem. It also means official data understates the economy.
Being landlocked is not automatically fatal. Several landlocked countries are wealthy; it raises costs rather than fixing outcomes.
Do not blame culture. Frame social barriers through incentives, institutions and bargaining power.
Up next: Trade Strategies, Diversification and Social Enterprise — the first family of solutions, starting with the two strategies that pull in opposite directions.
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