What are the problems for a country depending on one commodity for most of its exports?

• →Primary product dependency refers to a situation in which a significant proportion of a country's export earnings derive from a narrow range of primary sector products, such as agricultural commodities or minerals.
• →Because primary commodities are traded on world markets, their prices are determined by global supply and demand forces that are entirely outside the exporting country's control.
• →This means that a fall in global demand for example, a slowdown in Chinese manufacturing reducing demand for copper, can trigger a sharp decline in export revenues for a copper-dependent economy such as Zambia or Chile.
• →As a result, government tax revenue fall alongside export earnings, forcing cuts to public spending on health, education, and infrastructure at precisely the moment when the domestic economy is under stress.
• →Furthermore, primary commodities are subject to the Prebisch–Singer hypothesis, which states that the long-run relative price of primary goods tends to decline compared to manufactured goods.
• →This means that over time a country must export an ever-increasing volume of its commodity simply to import the same quantity of manufactured capital goods, causing a structural deterioration in the terms of trade.
• →The resulting current account pressures may force the economy into persistent deficits and reliance on external borrowing.
• →Therefore, growth becomes narrow and fragile, leaving the economy trapped in a low-value segment of global supply chains. Whether these problems are insurmountable depends partly on institutional quality and on whether commodity revenues are invested strategically in diversification, Botswana's management of diamond revenues illustrates a positive outcome from a primary product.

• →The Prebisch–Singer hypothesis: understand that this predicts a secular downward trend in the relative price of primary commodities versus manufactures, and be able to explain the mechanism (low income elasticity of demand for primary goods; technological progress reducing raw material intensity in production).
• →Price volatility and income instability: primary commodity prices are highly volatile because both supply (affected by weather, geopolitical events) and demand (sensitive to the global business cycle) shift unpredictably, making it difficult for governments to plan expenditure or for firms to invest.
• →Dutch Disease: a commodity export boom can cause currency appreciation, which makes other export sectors (notably manufacturing) uncompetitive, hollowing out industrial capacity precisely when diversification is needed.
• →Limited linkage effects: primary extraction is often capital-intensive and enclave in nature, meaning it generates few jobs, limited skills transfer, and weak supply-chain links to the rest of the economy — constraining the multiplier effect of commodity revenues.
• →Terms of trade and the current account: be precise about how deteriorating terms of trade affect the current account balance, and how persistent deficits may lead to rising external debt — connecting primary product dependency to wider macroeconomic imbalances.

Questions on this topic assess understanding of the structural constraints on economic development, as set out in Edexcel spec point 4.3.2.a, which covers the characteristics and challenges faced by developing economies. Specifically, examiners are testing whether students can explain the mechanisms through which commodity dependence limits growth and development — including price instability, deteriorating terms of trade, and the absence of diversification — and evaluate policy responses or mitigating factors with sufficient nuance to access the higher mark bands.

Examined 3 times across Edexcel since 2017.

The highest-tariff appearance was the June 2018 25-mark question, which also required a diagram — making it the most technically demanding version of this theme seen to date.