An Ode to the Genius of the Humble Shipping Container

From the Economist:

In a set of 22 industrialised countries containerisation explains a 320% rise in bilateral trade over the first five years after adoption and 790% over 20 years. By comparison, a bilateral free-trade agreement raises trade by 45% over 20 years and GATT membership adds 285%.

To tackle the sticky question of what is causing what, the authors check whether their variables can predict trade flows in years before container shipping is actually adopted. (If the fact that a country eventually adopts containers predicts growth in its trade in years before that adoption actually occurred, that would be evidence that the “container” jump in trade was actually down to some other pre-existing trend.) But they do not, the authors say, providing strong evidence that containerisation caused the estimated surge in trade.