Balance of Payments (Balance of Payments, Exchange rates and International Competitiveness)

The balance of payments (BoP) is a record of all economic transactions between the residents of a country and the rest of the world over a period of time. At Unit 4 you must know it in full — not just the current account, but the three accounts it is built from.

Account	What it records	Relative size
Current account	Trade in goods and services, primary income (wages, investment income) and secondary income (transfers) — the "here-and-now" earnings side	Usually the largest, headline balance
Capital account	Capital transfers (e.g. debt forgiveness, migrants' assets) and the sale/purchase of non-produced, non-financial assets (e.g. patents, copyrights, land for embassies)	Very small in most economies
Financial account	Cross-border investment: foreign direct investment (FDI), portfolio investment (shares and bonds), other investment (loans, deposits) and changes in reserve assets	Large — it finances the current account

Every transaction is a credit (+) or a debit (−):

• Credit (+): money in — exports, income earned abroad, inward investment.
• Debit (−): money out — imports, income paid abroad, outward investment.

A* link. Be precise with names. The capital account at Unit 4 is not the same as "capital flows" — it is a tiny account for capital transfers and non-produced non-financial assets. The big cross-border investment flows (FDI, portfolio, reserves) sit in the financial account. Muddling the two is a classic Unit 4 slip that the Unit-2 course never has to worry about.

The current account is the headline balance and has four components. Learn them precisely — Unit 4 tests whether you can classify a transaction into the right box and trace what a change does to the balance.

Component	What it records	Examples (credit = money in)
1. Trade in goods	Exports and imports of physical, tangible products (the visible balance)	Exporting cars, oil, machinery; importing food, electronics
2. Trade in services	Exports and imports of intangible services (the invisible balance)	Tourism, banking, insurance, shipping, education sold to foreigners
3. Primary income	Income from factors of production abroad — investment income (interest, profit, dividends) and compensation of employees (wages)	Dividends on overseas shares; wages of a citizen working abroad
4. Secondary income	Current transfers — money moved with nothing given in return	Foreign aid, remittances sent home by migrant workers, contributions to international bodies

The current account balance is the sum of the four component balances:

$\text{Current account} = \text{trade in goods} + \text{trade in services} + \text{primary income} + \text{secondary income}$

Equivalently it is total credits (money in) − total debits (money out) across all four parts. Two sub-balances sit inside it:

• Balance of trade in goods (visible balance) = goods exports − goods imports.
• Balance of trade in goods and services = goods balance + services balance — what most people mean by "the trade balance".

A* link. Watch the direction of primary income. A country that owns assets abroad earns interest/profit/dividends → a primary-income credit. But a country that has attracted lots of inward FDI must pay profits out → a primary-income debit, even though the investment itself was welcome. So heavy inward investment (a financial-account inflow) can worsen the current account later — exactly the kind of link between accounts Unit 4 rewards.

The single most important Unit-4 idea is that the balance of payments as a whole must balance — the three accounts (plus a small "errors and omissions" adjustment) sum to zero:

$\text{Current account} + \text{Capital account} + \text{Financial account} + \text{errors and omissions} = 0$

The logic is simple double-entry accounting. If a country imports more than it exports on the current account, it is spending more foreign currency than it earns. That gap has to be paid for somehow — by borrowing from abroad, selling assets to foreigners, or running down reserves. Every one of those is an inflow on the financial account. So:

• A current-account deficit is matched (financed) by a financial-account surplus — money flows in on the financial account to pay for the excess imports.
• A current-account surplus is matched by a financial-account deficit — the country lends abroad or buys foreign assets with its surplus earnings.

A worked feel (£bn, capital account ≈ 0 and errors ignored):

Account	Balance
Current account	−40 (deficit)
Capital account	0
Financial account	+40 (surplus — net inflows finance the deficit)
Sum	0

The country runs a £40bn current-account deficit, funded by £40bn of net financial inflows (foreign purchases of its bonds, firms and property, or new borrowing).

A* link. "Sums to zero" is an accounting identity, not an economic guarantee that all is well. It tells you the deficit is being financed; it says nothing about the quality of that financing. A deficit funded by stable, long-term FDI is comfortable; one funded by volatile short-term 'hot money' that can flee overnight is fragile. The identity is where a top-band evaluation starts, not where it ends.

Why does a country run a deficit (or a surplus)? Learn the causes as chains — 'so exports fall / imports rise / the balance worsens' — not one-liners.

1. Competitiveness. If a country's goods and services are uncompetitive (higher prices or lower quality than rivals), foreigners buy fewer exports and residents buy more imports → deficit. High relative costs (wages, energy) and high relative inflation erode competitiveness; low costs and high quality push towards surplus.

2. The exchange rate. A strong (appreciated) currency makes exports dearer abroad and imports cheaper at home → deficit. A weak (depreciated) currency does the reverse → surplus (subject to the Marshall–Lerner condition and the J-curve — see below).

3. Relative growth and incomes. If the domestic economy grows faster than its trading partners, rising incomes pull in more imports, while partners' slower growth means weaker demand for its exports → deficit. A country in recession while partners boom may swing into surplus.

4. Productivity. Low productivity raises unit costs and weakens competitiveness over time → structural deficit. High and rising productivity supports a persistent surplus.

5. Structural factors. Deeper features of the economy: deindustrialisation (a shrinking exportable manufacturing base), over-reliance on commodity exports (vulnerable to price swings), an appreciating "petro-currency", or a savings–investment gap (a country that invests more than it saves must import capital, running a current-account deficit).

Cause	Pushes towards a DEFICIT when…	Pushes towards a SURPLUS when…
Competitiveness	prices high / quality low vs rivals	prices low / quality high
Exchange rate	currency strong (exports dear)	currency weak (exports cheap)
Relative growth/incomes	growing faster than partners	growing slower than partners
Productivity	low / falling	high / rising
Structural	deindustrialised, commodity-dependent, low savings	strong tradable base, high savings

Strong answers select one cause, trace it through exports, imports and the balance, then evaluate how large and how lasting the effect is.

Because the accounts sum to zero, a persistent current-account deficit must be financed year after year — and that is where the risks lie.

Consequences of a persistent deficit:

1. Financing and indebtedness. The deficit is financed by borrowing abroad or selling assets, so external debt rises or ownership of firms, property and bonds passes to foreigners. Servicing that debt (interest, profit repatriation) then worsens future primary income — a self-reinforcing cycle.
2. Currency pressure. Persistent excess demand for foreign currency (to buy imports) can push the exchange rate down, risking imported inflation. If confidence falls, financing can dry up suddenly (a "sudden stop"), forcing a sharp, painful adjustment.
3. Lost demand and jobs. A deficit is net leakage from the circular flow — spending going on imports rather than domestic output — which can lower AD, growth and employment in tradable sectors.

Consequences of a persistent surplus (often overlooked):

• It can reflect weak domestic demand — the country under-consuming and relying on exports for growth.
• It can provoke trade tensions and retaliation from deficit partners.
• One country's surplus is another's deficit, so large surpluses contribute to global imbalances.
• A persistent surplus tends to appreciate the currency over time, eventually eroding the competitiveness that produced it.

But an imbalance is not always harmful. A deficit that finances productive investment (importing capital goods to raise future output and exports) is a "good" deficit; a deficit reflecting a strong, fast-growing economy can signal strength; and a deficit financed by stable inflows in a country borrowing in its own currency is sustainable for a long time.

A* link. The killer evaluation line: whether a deficit matters depends on its cause (structural vs cyclical), size relative to GDP, how it is financed (stable FDI vs volatile hot money) and what the borrowing funds (consumption vs productive investment). Neither a deficit nor a surplus is automatically 'good' or 'bad' — the judgement is always conditional.

Unit 4 wants you to evaluate the three families of policy a government can use to correct a current-account deficit. Each works differently — and each has costs.

1. Expenditure-switching policies — switch spending away from imports and towards exports/domestic goods.

• Devaluation / depreciation of the currency makes exports cheaper abroad and imports dearer at home. It only improves the balance if the Marshall–Lerner condition holds (combined price elasticities of demand for exports and imports > 1), and may worsen the balance first (the J-curve) before improving.
• Protectionism — tariffs, quotas and other barriers make imports dearer or scarcer. But it invites retaliation, breaches trade agreements, raises costs for domestic firms using imported inputs, and can be inflationary.

2. Expenditure-reducing policies — cut total domestic demand so that import spending falls.

• Deflationary (contractionary) fiscal policy — higher taxes / lower government spending reduces disposable income and AD, so imports (which rise with income) fall.
• Contractionary monetary policy — higher interest rates cut borrowing and spending, reducing imports (and attracting financial inflows that support the currency).
• The problem: reducing AD lowers growth and raises unemployment — a heavy price for correcting the deficit, and politically unpopular.

3. Supply-side policies — raise competitiveness and productivity so exports rise and import-substitutes improve without cutting demand.

• Investment in education, training, infrastructure and R&D; incentives for innovation; measures to raise productivity and improve non-price competitiveness (quality, design, reliability).
• These tackle a structural deficit at its root and avoid the growth/unemployment cost of demand deflation — but they are slow to work and uncertain.

Policy family	Mechanism	Main drawback
Expenditure-switching	Devaluation / protectionism → exports cheaper, imports dearer	Marshall–Lerner / J-curve; retaliation; inflation
Expenditure-reducing	Deflationary fiscal/monetary policy → lower demand → fewer imports	Lower growth, higher unemployment
Supply-side	Raise productivity and competitiveness → more exports	Slow, costly, uncertain results

A* link. The strongest evaluation ties the policy to the cause. A cyclical deficit from over-heated demand may only need mild expenditure-reducing measures; a structural deficit from poor competitiveness needs supply-side policy, because devaluation or deflation only treat the symptom. Expenditure-switching via devaluation is often a short-run fix (limited by Marshall–Lerner and the J-curve) while supply-side reform is the long-run cure — matching the policy to the diagnosis and time horizon is the mark of a top answer.

The Section B(a) calculation is worth easy marks if you are disciplined with signs. Two methods give the same answer.

Method A — sum the component balances. For each component work out credits − debits (money in minus money out), keep the sign, then add the four:

$\text{Current account} = \text{goods bal.} + \text{services bal.} + \text{primary income bal.} + \text{secondary income bal.}$

Method B — total credits − total debits. Add all money in and subtract all money out across the whole current account.

Worked example (£bn).

Component	Credits (in)	Debits (out)	Balance
Trade in goods	250	310	−60
Trade in services	160	110	+50
Primary income	70	55	+15
Secondary income	10	25	−15

• Trade balance (goods + services) $= -60 + 50 = -10$ → a £10bn trade deficit.
• Current account balance $= -60 + 50 + 15 - 15 = \mathbf{-10}$ → a £10bn current-account deficit.

Check with Method B: total credits $= 250+160+70+10 = 490$; total debits $= 310+110+55+25 = 500$; balance $= 490 - 500 = -10$. ✓

By the identity, this −£10bn deficit must be financed by a +£10bn surplus on the capital and financial accounts combined.

As a % of GDP. If GDP is £2,000bn:

$\frac{-10}{2000} \times 100 = -0.5\% \text{ of GDP}$

so the deficit is 0.5% of GDP — small, and a better gauge of whether it "matters" than the raw £bn figure.

Golden rules:

• A negative balance = deficit; a positive balance = surplus. Always state which.
• Show working and keep credits and debits in the right columns — most lost marks are sign errors.
• "Trade balance" = goods (+ services) only; "current-account balance" = all four components.