WAEC Economics
Past Questions

AI Explanation

**The reasoning** The demand curve slopes **downward** because of the **Law of Demand**: as price decreases, quantity demanded increases, and vice versa. Think about it practically—when the price of garri or data bundles drops, you buy more, right? When it's expensive, you cut back. On a graph with price on the vertical axis and quantity on the horizontal axis, this inverse relationship creates a downward slope from left to right. Higher prices → fewer people can afford or want to buy. Lower prices → more people jump in to purchase. **Why the wrong options tempt you** - **Up (A)** confuses demand with supply (supply curves slope upward—sellers offer more at higher prices) - **Flat (C)** would mean price changes don't affect demand at all—unrealistic for normal goods - **Vertical (D)** would mean you'd buy the exact same amount regardless of price—only true for perfectly inelastic goods, not the general case **Quick takeaway** Remember: "When price goes DOWN, demand goes UP" — that's why the curve slopes down!

AI Explanation

**The reasoning** Cross-elasticity of demand measures how the quantity demanded of **one good** changes when the **price of another good** changes. This reveals the relationship between two different products. The formula: **Cross-elasticity = % change in quantity of Good A ÷ % change in price of Good B** - If **positive** → the goods are **substitutes** (when Pepsi's price rises, people buy more Coke) - If **negative** → the goods are **complements** (when petrol prices rise, people buy fewer cars) - If **zero** → unrelated goods (rice and shoes have no connection) So cross-elasticity specifically tells you whether goods are substitutes or complements. **Why the wrong options tempt you** **A) Same good** — That's regular price elasticity, not *cross*-elasticity. The word "cross" means it crosses between two different goods. **C) Time** — You're confusing this with how elasticity *changes* over time, but cross-elasticity measures product relationships, not time periods. **D) Income** — That's income elasticity, which shows how demand changes with consumer income. **Quick takeaway** "Cross" means crossing between two goods—it reveals if they're friends (complements) or rivals (substitutes).

AI Explanation

**The reasoning** M0 is the **narrowest measure of money supply** — it captures only the most liquid (immediately spendable) forms of money. Think of M0 as "money you can touch and spend right now without needing anyone's permission." M0 includes: - Physical cash (notes and coins) in public hands - Cash in bank vaults (reserves) That's it. Just **currency in circulation**. If you can't pull it out and buy akara with it immediately, it's not M0. **Why the wrong options tempt you** **B) All bank loans** — These are promises to pay, not actual cash. They're credit, which expands the money supply at higher levels (M2, M3), but they're not liquid currency. **C) All assets** — Too broad! Your phone is an asset, but it's not money. Assets include everything you own. **D) Land only** — Land is an asset, not currency. You can't use a plot in Lekki to buy bread directly. **Quick takeaway** Remember: **M0 = "Cash I can spend NOW"** — if it's physical money changing hands today, it's M0. Everything else is either credit or assets.

AI Explanation

**The reasoning** A **trade union** (or labour union) is an organized group formed *by workers* to protect their collective interests. Think of it as workers joining forces to negotiate better wages, safer working conditions, and fair treatment from employers. In Nigeria, examples include the Nigeria Labour Congress (NLC) and the Academic Staff Union of Universities (ASUU). These unions speak *on behalf of workers*, not for management or government. The core principle: **collective bargaining** — workers have more power together than alone. **Why the wrong options tempt you** - **A) Employers** — This confuses who unions *negotiate with* (employers) versus who they *represent* (workers). - **C) Government** — Government may regulate unions or mediate disputes, but unions advocate specifically for workers' rights, not government policies. - **D) Banks** — Completely unrelated. This might catch someone not paying attention. **Quick takeaway** Trade unions are workers standing together to fight for their rights — remember: *union* means *unity among workers*.

AI Explanation

**The reasoning** The **bank rate** (also called the **discount rate**) is the interest rate at which a country's central bank lends money to commercial banks. In Nigeria, this is controlled by the **Central Bank of Nigeria (CBN)**. Think of it this way: the CBN is like the "bank for banks." When FirstBank or GTBank needs emergency funds, they borrow from the CBN at the bank rate. By raising or lowering this rate, the CBN controls how expensive it is for banks to borrow money — which affects the whole economy. High bank rate = borrowing is expensive = less money circulating. Low bank rate = cheaper borrowing = more economic activity. This is a key **monetary policy tool** used to control inflation and stabilize the economy. **Why the wrong options tempt you** - **A) Stock exchange** deals with buying/selling shares, not interest rates - **C) Commercial banks** receive the bank rate; they don't set it (though they set their own lending rates to customers) - **D) Treasury** handles government spending and debt, not banking rates **Quick takeaway** The Central Bank sets the bank rate because it's the regulator that controls monetary policy — remember: "Central Bank = Controller of money supply and rates."

AI Explanation

## The reasoning A **subsidy** is money the government gives to producers to help them make goods cheaper. Think of it like this: if you're a farmer and fertilizer costs ₦10,000, but the government gives you ₦3,000 to buy it, your actual cost drops to ₦7,000. The principle: **Subsidies directly lower production expenses** for businesses. This is their main purpose — to encourage production by making it more affordable for companies to produce goods. When production costs fall, firms can either: - Sell at lower prices (helping consumers) - Keep higher profits - Produce more goods But the *direct* effect is always on **cost of production** — that's what the subsidy reduces immediately. --- ## Why the wrong options tempt you **A) Profit** — Actually, subsidies often *increase* profit because costs go down while selling price may stay the same. **C) Demand** — Subsidies don't reduce demand; they might even increase it if lower costs lead to lower prices. **D) Imports** — Subsidies can reduce imports *indirectly* by making local production competitive, but they don't directly reduce imports themselves. --- ## Quick takeaway **Subsidies = government money that makes production cheaper for businesses.**

AI Explanation

**The reasoning** Currency depreciation means your naira loses value against foreign currencies like the dollar or pound. Let's say ₦1 = $1 today, and you want to import a phone worth $100. You'd need ₦100. Now your currency depreciates: ₦2 = $1. That same $100 phone now costs you ₦200! You need **more naira** to buy the same foreign goods. This is the **depreciation-import price principle**: When your currency weakens, you pay more in local currency for anything priced in foreign currency. Imports become more expensive because you're essentially buying dollars (or pounds) at a higher naira price. **Why the wrong options tempt you** **A) Cheaper** — You might confuse depreciation with *exports* becoming cheaper for foreigners (which is true — they benefit from our weak naira). **C) Banned / D) Free** — These are policy actions governments take. Depreciation is just a market change in exchange rates, not a law. **Quick takeaway** When naira depreciates, you need more naira to buy the same amount of dollars — so anything imported costs you more in naira terms.