How a Balance of Trade Worsens, and Whether Pursuing a Healthy Trade Balance Leaves Room for Protectionism

Answer

Part (a)

The balance of trade is the difference between export revenue and import expenditure on goods and services. It worsens when export revenue falls and/or import expenditure rises. This essay explains two channels — an appreciation of the exchange rate, and a loss of comparative advantage — at least one of which affects both exports and imports.

Appreciation of the exchange rate. If the country’s currency appreciates over time, its exports become dearer in foreign-currency terms while imports become cheaper in domestic-currency terms. Provided demand for both exports and imports is price-elastic, the dearer exports suffer a more-than-proportionate fall in quantity demanded, lowering export revenue, while cheaper imports are demanded in greater quantity, raising import expenditure. Falling X and rising M worsen the balance of trade. (The same logic applies to relative inflation: if domestic costs rise faster than abroad, exports become relatively expensive and imports relatively cheap, again cutting X and raising M.)

Loss of comparative advantage. A country that under-invests in productive capacity while rivals invest in infrastructure and R&D gradually loses its comparative advantage — its relatively low opportunity cost — in goods it once exported. As foreign producers achieve lower costs in the same goods, foreign households buy fewer of the domestic country’s now-pricier exports (X-revenue falls) and domestic households switch to cheaper imports (M-spending rises). The country shifts from exporter towards importer in those goods, and the trade balance deteriorates.

Consolidation. A balance of trade worsens through any combination of falling export revenue and rising import expenditure. An appreciating currency or higher relative inflation works on both sides simultaneously through price competitiveness, while a gradual loss of comparative advantage erodes export demand and pulls in imports — each capable of turning the trade balance against the country over time.

Part (b)

Protectionism — tariffs, quotas, export subsidies — aims to switch spending from imports to domestic goods and to raise export competitiveness, ostensibly improving the trade balance. The view to assess is that pursuing a healthy trade balance leaves no room for protectionism. My thesis is that protectionism has a narrow, short-run role for some economies but, for most — and for small open economies in particular — it is ineffective or counter-productive, so the view is broadly correct, though “no room” overstates it.

Protectionism can improve the trade balance. A tariff raises the price of imports, contracting import volumes. If demand for imports is price-elastic, the more-than-proportionate fall in quantity lowers import expenditure, improving the trade balance. Pairing a tariff with an export subsidy — funded from the tariff revenue — lowers export prices and, if export demand is elastic, raises export revenue. Higher X and lower M improve the balance.

Protectionism may fail to improve the trade balance, and brings costs. First, the tariff imposes a welfare loss: consumers lose surplus (triangle D) and the extra domestic output (Q1–Q3) is produced by relatively inefficient firms that lack comparative advantage (triangle B). Second, where the deficit stems from a loss of comparative advantage, tariffs and subsidies cannot lower domestic costs enough to restore competitiveness — they are symptomatic relief, not a cure. Third, for import-reliant economies like Singapore, demand for imported raw materials is price-inelastic, so a tariff raises import expenditure rather than lowering it, worsening the trade balance; the dearer inputs also raise costs of production, lowering aggregate supply and generating slower growth and cost-push inflation. Fourth, protectionism invites retaliation: trading partners impose their own tariffs, so export revenue falls — possibly by more than the fall in import spending — and the balance does not improve. Finally, the beggar-thy-neighbour effect: cutting imports lowers partners’ national income, reducing their demand for the country’s exports, again undermining export revenue.

Judgement. Protectionism’s usefulness is narrow. It can help only in the short run, and chiefly for large economies with the capacity to substitute domestic production for restricted imports — where higher domestic output offsets fewer imports and the home market is large enough to absorb retaliation. Even then, export subsidies do not guarantee higher revenue, and the welfare losses persist. For small, trade-reliant economies such as Singapore — dependent on imported factors and on export markets for growth — protectionism is at best ineffective and at worst self-defeating, raising costs and inviting retaliation. The durable route to a healthy trade balance is to raise productivity and so lower unit costs, restoring genuine export competitiveness, while keeping markets open and diversifying import sources. The pursuit of a healthy trade balance therefore leaves little room for protectionism — close to none for small states — though a narrow, temporary role survives for large economies addressing a transient import surge. The blanket claim of “no room” is thus largely, but not quite wholly, correct.