Well I’ve thought that traffic on this site has been a little sparse so this is the first in a number of threads I’m planning to help Spur discussion of Mises.org!
Now my basic thesis here: The broken window fallacy (the creation of additional demand for its own sake) is economically inefficient and does not increase human welfare or employment because it only takes employment and money from areas where it would have otherwise have seen demand. This is Mises.org 101, why government spending cannot increase employment. With this said this is only relevant at full employment, and during an economic downturn with significant amount of unemployment it might not be the case.
In short the broken window fallacy and the usual explanation of it does not, in and of itself, refute the Keynesian paradigm. This is important because stimulus spending to end the recession is one of the biggest areas where government spending is demanded today. The Broken Window Fallacy, in its basic state necessitates that the money which would be spent on the broken window, would otherwise have been spent on something else, either invested on producer’s goods or spent on consumer’s goods. However, if we grant the usual Keynesian assumption that money is merely hoarded during a recession and prices are sticky, then this is no longer the case.
If there is a large amount of unemployment, and a high amount of uncertainty then Peter would likely have hoarded a great deal of his money rather than spending it on a window. If he does spend on the window then his consumption has increased, and the window repair person will also spend a portion of that money, thusly boosting the economy from what it would have been. If we assume this on a mass scale, then unemployment will be reduced and output would increase from an increase in general demand, from many broken windows.
If we did not break the windows, and increase aggregate demand, then we’re stuck in the recession and below full employment, UNLESS we can prove that there is another way to get out of the recession, and that the market will adjust in some other way or there is another negative aspect to spending, but the movement of resources from a market provided use to a state provided use, and thusly the absence of a gain in net productivity, is not an argument during a recession as such.
So for once and for all, the broken window fallacy in and of itself cannot even touch Keynesianism by itself, and it does not apply during a recession. It is a good mental exercise and an important part of government lies, but it is not a compelling counter argument to normal Keynesianism.
EDIT In order to reduce the astounding amount of confusion on this thread I would like to make this very clear: I AM NOT ARGUING IN FAVOR OF KEYNESIANISM, I AM MERELY STATING THAT THE BROKEN WINDOW FALLACY BY ITSELF AND UNAIDED BY OTHER ARGUMENTS DOES NOT ADDRESS KEYNESIANISM, however effectively other Austrian arguments can. There are very good Austrian objections to Keynesianism, but the broken window is not so long as we’re dealing with the heart of Keynesian work: Recessionary macroeconomics.