Tomato prices and the Mayor's ceiling in Yaoundé
In March a landslide closes the Mbouda–Yaoundé road for three weeks. Before the closure, Yaoundé's Mfoundi market received about 400 baskets of tomatoes a day and the price settled at 8,000 FCFA per basket. After the closure, only 180 baskets arrive daily by a longer route. The mayor, under pressure from consumers, fixes a maximum price of 6,000 FCFA per basket. Traders say transport costs have risen by 1,500 FCFA per basket and that they now lose money at the ceiling. Some sell secretly at 10,000 FCFA to regular customers; others mix unripe tomatoes into baskets to reduce quality. A consumers' association wants the ceiling kept until the road reopens. A group of traders threatens to stop supplying the market unless the ceiling is removed. The regional delegate must advise the mayor. There are no price controls on other vegetables.
1. Explain, using demand and supply, why the market price would rise after the road closure even without the mayor's ceiling.
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The road closure raises transport costs and reduces the quantity that can reach Mfoundi market. This shifts the supply curve to the left: at the old price of 8,000 FCFA, traders are willing and able to supply only about 180 baskets a day instead of 400. Demand at 8,000 FCFA has not fallen by the same amount, so there is excess demand of about 400 − 180 = 220 baskets a day. Buyers bid against one another for the scarce baskets, and the price is pulled upward. The higher price performs two jobs: it rations the smaller supply among buyers, and it gives traders an incentive to absorb the higher transport cost and keep bringing tomatoes by the longer route. The new equilibrium will be at a higher price and a smaller quantity than before. The ceiling prevents this adjustment rather than removing the underlying shortage.
2. Analyse the likely effects of the 6,000 FCFA maximum price. Include shortage, allocation, black market and quality.
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At 6,000 FCFA, the ceiling is below the market-clearing price. Quantity demanded increases as some buyers take advantage of the lower price, while quantity supplied falls because traders face higher transport costs and cannot cover them. The shortage therefore becomes larger than the 220-basket gap at 8,000 FCFA. The market must allocate the scarce baskets by non-price means: queues, personal connections, rationing by traders, or favouritism. A black market is likely, as shown by secret sales at 10,000 FCFA. The ceiling also weakens quality incentives: traders may mix unripe tomatoes into baskets to reduce losses, because they cannot recover higher costs through price. Some traders may withdraw from the market, making the shortage worse. Consumers who obtain tomatoes at 6,000 FCFA gain, but many consumers may get none, pay more in the black market, or receive lower quality. The policy protects a visible price while hiding the real scarcity.
3. Recommend what the mayor should do. Justify with economic reasoning and consider the consumers' association's view.
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The mayor should remove the fixed ceiling and allow the price to rise temporarily, while using targeted measures to protect vulnerable consumers. A ceiling below equilibrium does not create tomatoes; it creates queues, black markets and quality dilution. A higher price would ration the limited supply and encourage traders to use the longer route.
To answer the consumers' association, the mayor could: organise a temporary public sale of tomatoes bought from unaffected areas; give a limited food voucher or cash transfer to the poorest households; publish daily prices to reduce panic buying; and act against hoarding. The mayor should also prioritise reopening the road or organising a convoy, because the real problem is the supply shock. If the ceiling is kept for political reasons, it should be short, combined with a subsidy to traders for transport costs, and monitored for black-market sales. The judgement is that price controls treat the symptom, while supply restoration and targeted support treat the cause.