Food Economics, Marketing and Entrepreneurship
This domain applies economic reasoning to food enterprises: demand and supply, elasticity, cost structure, break-even, pricing, the marketing mix, value chains, and the practical running of a small food business from business plan to records and finance. Numeric questions on elasticity and break-even are frequent, so practise showing the formula and the interpretation.
Demand, supply and elasticity
- Price elasticity of demand (PED) = % change in quantity demanded ÷ % change in price. |PED| > 1 elastic; < 1 inelastic; = 1 unitary.
- Income elasticity: positive for normal goods, negative for inferior staples (Engel's law: as income rises, the share spent on food falls).
- Cross elasticity: positive for substitutes, negative for complements.
- Staples such as cassava and maize tend to be inelastic - a price rise raises total revenue, but hurts poor consumers most.
Costs and break-even
Fixed costs do not vary with output (rent, equipment); variable costs vary per unit (raw material, packaging, fuel). Total cost = fixed + (variable per unit × quantity). Break-even quantity = fixed costs ÷ (price − variable cost per unit); the denominator is the contribution margin per unit. Margin of safety = actual sales − break-even sales.
Worked example
A snack producer sells at 500 FCFA per pack with variable cost 300 FCFA and monthly fixed costs of 240,000 FCFA. Contribution = 200 FCFA. Break-even = 240,000 ÷ 200 = 1,200 packs per month. Now test a price change: raising price 10 % to 550 FCFA cuts sales from 500 to 400 packs. PED = −20 % ÷ +10 % = −2.0, elastic. Revenue before = 500 × 500 = 250,000; after = 550 × 400 = 220,000. Revenue falls, so the price rise destroys value despite the higher unit margin - the reasoning that earns credit.
Marketing and entrepreneurship
Marketing mix: product, price, place, promotion (plus people, process, physical evidence for services). Segmentation targets a defined consumer group. A business plan covers the concept, market analysis, operations, management, financial projections and risk. In Cameroon, smallholder groups often register as Common Initiative Groups (CIGs) and cooperatives; microfinance institutions provide working capital. Record keeping, costing sheets and separate business and household money are core competencies.
Traps
Mixing fixed with variable costs; confusing mark-up with margin; advising a price increase without checking elasticity; ignoring working capital and seasonality; and treating post-harvest loss as a marketing problem rather than an operations one.
Food Security, Sustainability and Consumer Issues
This domain connects production, access, utilisation and stability to consumer protection. It tests definitions, the measurement of food insecurity, causes of post-harvest loss, sustainability trade-offs, and consumer issues such as labelling, additives, food fraud and street-food safety in Cameroon.
The four pillars
- Availability: sufficient food physically present (production, imports, stocks).
- Access: households can obtain it - economic (purchasing power) and physical (roads, markets).
- Utilisation: food is safe, nutritious and properly used - cooking, water, sanitation, health status.
- Stability: the other three hold over time, including through the lean season and shocks.
Food security is about all four; a country can have enough food nationally yet still have food-insecure households. Levels run from global to national to household to individual.
Measuring insecurity
Dietary energy supply per capita, household consumption and expenditure surveys, the Food Insecurity Experience Scale, coping strategy indices, and anthropometric prevalence (stunting, wasting). Each measures a different pillar - do not use a production figure to claim access.
Losses and sustainability
Post-harvest losses occur at harvest, handling, transport, storage and processing; in tomato, plantain and cassava they are largely physical and economic. Sustainability has environmental, economic and social dimensions: soil health, water use, biodiversity, fair returns to farmers, and affordable food for consumers.
Worked example
A trader buys 2,000 kg of tomatoes. 30 % is lost in transport and 15 % of what remains is lost in storage. Saleable mass = 2,000 × 0.70 = 1,400 kg; then 1,400 × 0.85 = 1,190 kg. Total loss = 810 kg = 40.5 %, not 45 %. Reasoning: sequential percentage losses compound multiplicatively (0.70 × 0.85 = 0.595 kept). This is the calculation most often failed.
Consumer issues
- Labelling: name, ingredients, net weight, date marking, storage conditions, allergen and additive declaration; misleading claims are a consumer-protection issue.
- Additives: classified by function (preservatives, colourants, emulsifiers, thickeners); permitted lists and maximum levels apply.
- Food fraud and adulteration: dilution, substitution, false origin, expired stock re-dating.
- Street foods: high nutritional value and income, but risks from water, utensils, hand hygiene and holding temperature.
- New technologies: GM foods, irradiation and organic claims raise choice, labelling and trust questions.
Traps
Equating food security with food safety; assuming availability guarantees access; adding sequential percentage losses; treating sustainability as purely environmental; and forgetting that stability across seasons is a separate pillar.