Keynesian economics suggests that adjusting government spending and tax rates are the best ways to stimulate aggregate demand. His can be used in times of recession or low economic activity as on essential tool in providing the framework for strong economic growth and working toward full employment. The government can implement these deficit-spending policies due to s size and stimulate trade, in theory these deficits would be paid for by an expended economy during the boom that would follow: this was the reasoning behind the new deal.