Before assessing AfCFTA, we need the theory of economic integration — which, crucially, tells us that integration is not automatically beneficial. This module covers the stages of integration, Viner's trade-creation-vs-diversion analysis (the key tool), and the distinction between shallow and deep integration that determines where the real modern gains lie.
The stages of integration
Bela Balassa's classic ladder of integration (deepening at each rung): a free-trade area (members remove tariffs among themselves, keep separate external tariffs), a customs union (an FTA plus a common external tariff), a common market (a customs union plus free movement of labour and capital), an economic union (a common market plus harmonised economic policies), and finally a monetary/full economic union (a shared currency and unified policy — the euro, the CFA, the International Macro course). AfCFTA begins as a free-trade area (its name), with the continental ambition (Agenda 2063, the Abuja Treaty) pointing toward deeper stages — an African Economic Community and eventually monetary union — over the long run. Knowing the ladder clarifies both what AfCFTA is now (an FTA) and where it aspires to go.
Trade creation and trade diversion
Viner: the central tool
The most important analytical tool for assessing any integration (from the preferential-trade module, applied here to Africa). Forming a preferential bloc has two opposing effects: • Trade creation (GOOD) — a member's production shifts from a high-cost DOMESTIC producer to a lower-cost PARTNER producer, now tariff-free. Efficiency improves. • Trade diversion (BAD) — a member's imports shift from the lowest-cost WORLD producer to a higher-cost PARTNER producer, because the partner gets the tariff preference while the efficient outsider still faces the external tariff. Efficiency falls, and the government loses the tariff revenue. Whether a bloc raises or lowers welfare depends on whether creation or diversion dominates. Creation is more likely to dominate when (a) the partners are LOW-COST, competitive producers (so sourcing from them is genuinely efficient), and (b) the external tariff against the rest of the world is LOW (so little efficient world trade is diverted). Diversion is more likely when integrating among HIGH-COST producers behind a HIGH external tariff. This is the lens through which AfCFTA's welfare effects must be judged — and it raises a real concern for South-South integration.
The South-South diversion risk
Integrating among high-cost producers
Viner's analysis carries a specific warning for African integration. If African countries are relatively high-cost producers (compared with, say, China) and they form a bloc that gives each other tariff preferences while maintaining tariffs against the efficient rest of the world, the bloc could be net trade-DIVERTING — African consumers and firms shifting from cheap Chinese/world goods to more expensive African-partner goods because of the preference, losing efficiency and tariff revenue. This is the standard critique of South-South integration: a club of similar high-cost developing economies risks diverting trade rather than creating it. The counter-arguments (why AfCFTA may still be beneficial despite this static concern): (1) the DYNAMIC gains — scale economies, competition, learning, and industrialisation (the new-trade-theory and development arguments) — may dominate the static Vinerian calculus; (2) AfCFTA aims for relatively LOW external tariffs and to boost MANUFACTURED intra-African trade (which builds capacity rather than just diverting commodity trade); and (3) the integration is partly about deep, behind-the-border integration (below) where the gains are larger. So the static diversion risk is real and must be managed (keep external tariffs low, integrate to build competitiveness not shelter inefficiency), but it does not doom AfCFTA — provided the dynamic and deep-integration gains are realised. The honest position: AfCFTA's success depends on it being creation- and capacity-building-oriented, not a high-tariff club sheltering inefficient producers.
Shallow versus deep integration
Where the modern gains are
Shallow integration removes border barriers — tariffs and quotas. Deep integration goes behind the border, harmonising the regulations, standards, services rules, investment regimes, and competition policies that increasingly matter more than tariffs (especially as tariffs are already low or falling). The crucial modern insight: with tariffs already modest in many cases, the LARGER gains from integration now come from DEEP integration — reducing the regulatory, services, and non-tariff barriers that fragment markets, not just cutting tariffs. This is why modern trade agreements (and AfCFTA's later phases — services, investment, competition, digital, the beyond-goods module) focus on deep integration. For Africa, the deep-integration agenda — harmonising standards, liberalising services, facilitating trade, building a digital single market — may yield more than the headline tariff-cutting, and it is also where the diversion concern matters less (deep integration is more about reducing real costs than reallocating tariff-protected trade). The shift from shallow to deep is the frontier of integration economics.
Exercise
African countries form a continental free-trade area. A critic argues, 'This will just be trade-diverting — Africans will buy expensive African goods instead of cheap Chinese ones, losing efficiency and tariff revenue, so it will make the continent worse off.' (1) Explain the trade-diversion concern the critic is raising and when it would be valid. (2) Give the counter-arguments for why AfCFTA may still be beneficial. (3) Explain how keeping the external tariff low and focusing on deep integration addresses the concern. (4) Explain why the dynamic gains might dominate the static Vinerian calculus for Africa specifically.