For your Saturday reading pleasure, from Fed Vice Chairman Stanley Fischer: The Federal Reserve and the Global Economy. Here is the conclusion:
To summarize and conclude, the Fed’s statutory objectives are defined by its dual mandate to pursue maximum sustainable employment and price stability in the U.S. economy. But the U.S. economy and the economies of the rest of the world have important feedback effects on each other. To make coherent policy choices, we have to take these feedback effects into account. The most important contribution that U.S. policymakers can make to the health of the world economy is to keep our own house in order–and the same goes for all countries. Because the dollar is the primary international currency, we have, in the past, had to take action–particularly in times of global economic crisis–to maintain order in international capital markets, such as the central bank liquidity swap lines extended during the global financial crisis. In that case, we were acting in accordance with our dual mandate, in the interest of the U.S. economy, by taking actions that also benefit the world economy. Going forward, we will continue to be guided by those same principles.