How globalisation helped lower inflation

Expanding international trade can increase competition within and between economies. One argument in the global disinflation literature is that this competitive pressure helped prices rise more slowly as barriers to trade fell and firms became more exposed to international markets.

From 1990 into the mid-2000s, tariff rates declined across much of the world while trade expanded relative to economic output. Over a broadly similar period, average inflation also moved lower. The timing prompted researchers to ask whether trade liberalisation contributed to disinflation in addition to better-known changes in central-bank policy.

What the cross-country pattern suggested

Historical comparisons covering a large group of countries showed inflation becoming more concentrated near low positive rates between 1980 and 2010. Deflation remained uncommon, the shift appeared across several regions, and the movement was gradual rather than a single abrupt break.

Those observations did not prove that trade caused lower inflation. They did, however, motivate an examination of mechanisms that could operate across economies with very different monetary institutions.

Trade, competition and productivity

Trade theory offers one possible channel through firm productivity. Greater openness exposes domestic producers to additional competition and can favour businesses that use resources more efficiently. The influential firm-selection framework developed by Melitz in 2003 formalised how trade can reallocate activity towards more productive firms.

Building on that framework, research published by Schwerhoff and Sy examined how falling tariffs could increase openness and affect inflation. In the model, stronger competition shifts market activity towards efficient firms, which tend to operate with lower prices than less efficient producers. Aggregate prices therefore increase more slowly while that reallocation occurs.

Firms also innovate independently of trade policy. Productivity growth can reduce the cost of goods relative to wages, while openness may reinforce the process by allowing efficient producers to expand and less efficient ones to leave the market.

Relative prices are not the same as inflation

A productivity improvement first affects relative prices: goods may become cheaper compared with labour or other inputs. Inflation, by contrast, concerns the overall price level. Wages and goods prices can both rise while their relationship remains unchanged, so productivity alone does not determine measured inflation.

The monetary environment therefore remains essential. A standard quantity-based account holds that sustained inflation depends on money growth relative to real output. If globalisation enables more output and monetary conditions do not fully offset that increase, inflation may decline.

The widespread nature of historical disinflation led economists to consider factors beyond monetary policy alone. Trade was one candidate because increasing commercial integration reached countries whose central banks differed significantly in credibility, independence and capacity.

Policy implications and limits

The research suggested that trade liberalisation could provide a temporary benefit when an economy was addressing high inflation. Monetary authorities might then seek to stabilise inflation at the lower level rather than assuming the improvement would continue automatically.

The proposed effect depends on increasing openness and intensifying competition. Once openness stabilises, the additional downward pressure may diminish. A central bank that mistakes a temporary structural influence for a permanent change could underestimate later inflation pressure.

This is best read as one historical mechanism rather than a universal prescription. Trade policy also affects employment patterns, supply resilience, distribution and strategic exposure. Inflation outcomes depend on energy and commodity prices, exchange rates, fiscal policy, expectations, supply constraints and monetary decisions as well as trade.