Abstract
This paper examines whether the international role of the dollar as main global reserve currency has contributed to persistent current account imbalances. To this end, we analyse how central banks' accumulation of reserve assets affects the current account balance of both reserve-accumulating and reserve-providing countries.Based on a simple portfolio balance model we show theoretically that the global demand for reserve assets by central banks may lower the current account balance of the reserve-issuing country. Our panel data analysis over the period 1970–2009 confirms this hypothesis: Any dollar of provided reserve assets decreases the US current account by more than one dollar. On average, the demand for dollar reserves has lowered the US current account by 1–2 percentage points relative to GDP. The flip side of this effect is a higher current account balance in reserve-accumulating countries. These novel findings show that the worldwide demand for international reserves has contributed to the buildup of global imbalances.
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