This paper addresses vulnerability of revenue to external shocks using export composition to capture economic structure and differentiating countries according to income levels, resource endowments and political regimes. This gives a richer characterisation than previous studies. Lower income countries are vulnerable to shocks, especially in terms of trade (associated with the greatest revenue loss): democratic regimes seem to be less vulnerable to revenue losses due to shocks than non-democracies whereas revenue in resource rich countries is more vulnerable to shocks (except natural disasters) than non-resource rich countries. We find a negative relationship between manufacturing exports and revenue in lower income countries.
