My inaugural column for Forbes.com, "Avoiding the Coming Growth Slowdown," is now up. Here's a teaser:
Consider this puzzle. Compare economic performance in two periods: 1973-1990 versus 1990-2007. Both periods are 17 years in length; both begin and end with the last year of an economic expansion. In the earlier period, the U.S. economy weathered oil shocks, stagflation, and a punishing recession in the early ’80s, and growth in labor productivity in the nonfarm business sector limped along at a dismal 1.33 percent a year. In the latter period, prosperity was interrupted only by a pair of brief, mild recessions, and the IT revolution led a dazzling rebound in productivity growth up to 2.33 percent a year. Yet in 1973-1990, real gross domestic product per capita rose at an average annual rate of 1.93 percent – better than the 1.85 percent average annual growth rate during 1990-2007. How could that have happened?
Check out the whole thing.

I think that you are right that we should expect fairly low GDP per capita growth in the coming years (although I think that inflation is generally overstated, so this may be more an artifact of measurement).
However, I think there is a small chance (maybe 1-5%) that we blow way past any of these predictions and do get really large productivity gains, on the order of 5%/yr or more, as a result of another major technological shift. But these sorts of things are obviously hard to predict or plan for :).
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