profits, cash on hand, debt, and aggregate demand
(Chart via Orcam Investment Research) http://pragcap.com/an-alternative-view-on-the-corporate-cash-hoard let me say, however, that I think there’s a very good case that the redistribution of income away from labor to corporate profits is very likely a big factor. http://krugman.blogs.nytimes.com/2013/02/08/corporate-hoarding-and-the-slow-recovery/
