Currency collapses and output dynamics in commodity dependent countries

This paper provides new empirical evidence on the relationship between currency collapses (i.e. large nominal depreciations or devaluations) and real output by paying a specific attention to commodity exporting countries. Using a dataset including 108 emerging and developing economies for the period 1970–2016, we document and estimate what happens to output growth during episodes of currency collapses for commodity-dependent and non commodity-dependent countries. One particular feature of our analysis is to control for war events. We find that currency crises occur more frequently in commodity-dependent countries (one crisis every 17 years versus 30 years for non commodity-dependent countries) and with a larger magnitude (median depreciation about 12% points larger for commodity-dependent countries). In both groups of countries, output growth declines in response to the currency collapse. It appears however that output growth starts to slowdown earlier in commodity-dependent countries while the impact is more persistent in non commodity-dependent countries. The magnitude of the output growth slowdown is very close between the two groups of countries. Finally, we find that the output growth-currency collapse relationship differs among commodity-dependent countries according to the category of their main exported commodity. More precisely, it turns out that currency collapses affect mainly the output growth of agricultural exporters while the impact on the output growth of energy or mineral exporters is not significant.