And so the increase in the national debt has been gargantuan; but has there been any resulting “stimulus,” that is, enhanced economic growth? The following charts show the respective contributions of private investment, personal consumption, net exports, and government spending to GDP growth for the last three years.
Investment changes explain most of the recession and recent recovery. Changes in personal consumption have an effect that is important but smaller, while changes in net exports seem to explain only some of the smaller GDP changes in 2008. What is of greater interest is the contribution of government outlays: They have had virtually no effect at all (with a simple “correlation” with GDP growth of only about 5 percent).
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