Cameroon GCE O-Level Economics common mistakes
Cameroon GCE O-Level Economics · Understand the traps and how to avoid them.
When asked to explain the basic economic problem, candidates define it purely as 'poverty' or 'lack of money' and then answer every scarcity question by describing poor people or government underfunding, rather than stating the unlimited wants versus limited resources mismatch and the resulting need for choice, opportunity cost and allocation.
Everyday Cameroonian usage of 'scarcity' and 'economic problem' means hardship or shortage of cash, so candidates import the colloquial meaning into the technical one. Textbooks are skimmed for the phrase 'limited resources' without linking it to the three questions (what, how, for whom) and to opportunity cost, so the concept never becomes a usable tool.
What to do instead
Train a fixed three-sentence template and apply it to every example: wants are unlimited, resources (land, labour, capital, enterprise) are limited and have alternative uses, therefore choice is necessary and every choice has an opportunity cost. Practise by taking five concrete situations (a family budget, a government road project, a farmer's plot, school leavers' time, foreign exchange) and writing the template plus the specific opportunity cost for each. When a question says 'scarcity', never write 'poverty' unless the question is about income distribution.
On demand-and-supply diagrams, candidates shift the curve and move along the curve interchangeably: they answer 'a fall in price increases demand so the demand curve shifts right', or they draw a price ceiling and then move the supply curve instead of reading the shortage off the existing curves.
The words 'increase in demand' and 'increase in quantity demanded' sound identical in ordinary speech, and candidates learn the diagram by copying shapes rather than by attaching each shape to a cause. Under exam pressure they reach for the more dramatic action (shifting a line) even when the cause is a price change.
What to do instead
Drill the cause test before drawing: if the only thing that changed is the good's own price, move along the curve and call it quantity demanded/supplied; if a non-price determinant changed (income, tastes, price of substitutes or complements, population, expectations; for supply: input costs, technology, taxes and subsidies, weather, number of firms), shift the curve. Write the label 'extension/contraction' versus 'increase/decrease' on every practice diagram, and always state the new equilibrium price and quantity in words after shifting.
Candidates compute price elasticity of demand with the wrong formula orientation or wrong base, for example dividing the change in price by the change in quantity, or dividing by the new value instead of the original, and then label a good 'elastic' when the coefficient is below one. They also treat a steep demand curve as automatically elastic.
The formula is memorised as a jumble of symbols without the meaning 'responsiveness of quantity to price', and candidates have not internalised that the answer must be a pure number compared with 1. Slope and elasticity are conflated because both are drawn as steepness on the same axes.
What to do instead
Always write the formula as (% change in quantity demanded) ÷ (% change in price), compute each percentage against the original value, and immediately classify: greater than 1 elastic, equal to 1 unitary, less than 1 inelastic, zero perfectly inelastic. Practise with numbers where the answer is obvious (price rises 10%, quantity falls 30% gives 3, elastic) and with a real case such as salt versus air travel. For the slope confusion, remember elasticity also depends on the price and quantity at the point, so state the point you are measuring at.
In production and cost questions, candidates draw total product, average product and marginal product curves that do not obey the required relationships (marginal product crossing average product at its maximum, marginal cost cutting average cost at its minimum), or they place fixed costs on a diagram that should show only variable costs in the short run.
The curves are learned as three separate pictures rather than as one family derived from the same production function, so the intersection rules are not understood as arithmetic necessities. The short-run/long-run distinction is treated as a vocabulary item rather than as 'is there a fixed factor?'
What to do instead
Derive the relationships once by hand with a small table: units of labour 1 to 6, total product, then marginal and average product computed from it, then cost columns. Observe in your own numbers that marginal pulls average up or down and must cross it at the average's turning point. Before any diagram, ask 'is any factor fixed?' and label axes and curves accordingly; check that MC crosses AC at AC's minimum and that AFC falls continuously.
Candidates describe every market structure with the same phrases ('many buyers and sellers, price takers') and cannot distinguish monopolistic competition from perfect competition or oligopoly, nor explain why a monopolist's marginal revenue lies below price and why output is set where marginal cost equals marginal revenue.
The structures are memorised as lists of features without a decision rule, and the diagrams look similar, so candidates default to the perfect-competition answer, which is the first one taught. The MR-equals-MC profit rule is often learned only for perfect competition, where price equals marginal revenue, and is then misapplied to monopoly.
What to do instead
Build a comparison grid with rows for number of firms, nature of product, barriers to entry, price-setting power, long-run profit and examples in Cameroon (farmers' cocoa, a taxi union, mobile network operators, a single water utility). For monopoly, always draw the downward demand curve and the separate MR curve below it, mark output at MR = MC, then read price up to the demand curve, and state in words why price exceeds marginal revenue (to sell more, the firm must cut price on all units).
On factor incomes, candidates say wages are determined by 'the government' or 'the employer's kindness', confuse rent with house rent, interest with any payment, and profit with the owner's salary; they cannot explain economic rent as a surplus over transfer earnings or why interest is the price of loanable funds.
Everyday meanings of rent, interest and profit dominate, and the factor-market analysis (derived demand, marginal revenue product, supply of factors) is taught late and thinly, so candidates fall back on moral or institutional explanations.
What to do instead
Anchor each income to a factor and a market: wages to labour, rent to land and other fixed factors, interest to capital, profit to enterprise and risk-bearing. Learn one definition sentence each, including economic rent as payment above transfer earnings and interest as the reward for parting with liquidity or for waiting. Apply them to Cameroon examples: land near Douala, a cocoa farm's profit after a bad season, a bank's lending rate, a minimum wage debate.
In money and banking questions, candidates list the functions of money but cannot distinguish money from near-money, describe a central bank as if it were a commercial bank, and explain credit creation as if banks lend out the whole of a deposit, ignoring the cash reserve ratio and the resulting money multiplier.
The functions are reproduced as a list without operational meaning, and the two-tier banking system is not connected to what candidates see (they use commercial banks but never see the central bank), so the functions blur. Credit creation is memorised as a phrase rather than as a sequence of balance-sheet changes.
What to do instead
Learn the four functions with an example each (medium of exchange, unit of account, store of value, standard of deferred payment) and test any asset against them to decide whether it is money. Separate the tiers in a table: central bank (issues currency, banker to government and to banks, lender of last resort, monetary policy) versus commercial banks (accept deposits, lend, create credit). Work credit creation numerically: deposit 100,000 with a 10% reserve ratio, trace round by round, and show total deposits approach 1,000,000 as the multiplier 1/0.1.
When measuring national income, candidates add transfer payments to GDP, count the sale of second-hand goods or intermediate goods as current output, and mix up GDP at market prices with GNP at factor cost; they also confuse nominal with real figures and cannot explain why GDP per head is an imperfect welfare measure.
The three counting rules (exclude transfers, exclude second-hand sales, count final goods only) are stated in class but not practised, and the price and factor-cost adjustments are treated as arbitrary labels. Candidates also assume the largest number is always the right answer.
What to do instead
Apply the three exclusion rules to a list of ten items and justify each decision in one line. Memorise the bridge in words: GDP at market prices minus indirect taxes plus subsidies gives GDP at factor cost; add net factor income from abroad to get GNP; divide by population for per head; deflate nominal values by a price index to get real values. Then list three concrete reasons GDP per head overstates welfare (pollution, inequality, non-market work) and one reason it understates it.
On public finance, candidates define a budget deficit as 'the government spending too much' without distinguishing revenue and expenditure items, classify any tax on a company as direct, and cannot explain the difference between progressive, proportional and regressive taxes or who actually bears a tax.
The terms are learned as labels rather than as tests, and incidence is counter-intuitive because candidates assume the person who hands over the money bears the whole burden. Political commentary in the media reinforces the 'overspending' shorthand.
What to do instead
Use two tests. Direct versus indirect: is the tax levied on income and wealth and paid by the same person (direct), or on goods and services and passed on in price (indirect)? Progressive versus regressive: does the tax take a larger share of income from the rich (progressive) or from the poor (regressive)? Then work incidence with an elasticity argument: a tax on a good with inelastic demand falls mainly on the consumer. Classify a list of Cameroonian taxes and fees with reasons.
In international trade and balance-of-payments questions, candidates treat a trade deficit as automatically bad, record the export of goods and the import of capital in the same account, and confuse a depreciation of the currency with a fall in the value of money domestically or with a devaluation decided by the authorities.
The current account and the financial/capital account are memorised as two lists without a sign convention, and the everyday phrase 'the money has lost value' is applied to the exchange rate. Media treatment of deficits as failures shapes the moral judgement.
What to do instead
Learn the balance-of-payments as a double-entry statement: goods and services plus primary and secondary income make the current account; capital transfers and financial flows make the capital and financial account; the two must offset, with reserves taking the residual. Classify ten transactions into the correct account with a plus or minus sign. Then define depreciation (market fall under floating rates) versus devaluation (official decision under a fixed peg) and note that a deficit can be financed by inflows that raise productive capacity.