165
Even though the practice of trend-following makes economists appear correct
about the direction of the trend, say, 80% of the time, they are really never correct at
all. We can understand this point more easily through analogy. Suppose there are two
sets of forecasters on a train traveling through fog: a socionomist in the cab of the
locomotive and a pack of economists in the caboose. Their job is to anticipate curves
in the track so the engineer can slow the train in time to negotiate them. The
economists are looking out the rear window saying, “The track is still straight as an
arrow behind us, so we predict more of the same.” Since curves in the track are few
and far between, extrapolating past trends in linear fashion makes the economists
appear correct most of the time, simply because the caboose is often going in the
same direction as the locomotive. The socionomist in the cab can’t see very well
because of the fog, so he makes several cautious suggestions for naught, but when the
curves arrive he can see them clearly. Although his forecasting record is imperfect, he
is in no way condemned to miss all the turns as the economists are.
First question: Who is actually in the forecasting business? Who even has a
chance to be right?
Second question: Who truly has the better track record? If the socionomist sees
the curves in time to slow the train before it careens off the rails, he has provided an
important service. Economists in the caboose cannot possibly anticipate any curves.
For the task at hand, they are never right. When your life or livelihood depends upon
advice, hind-casting is not an option. It is nothing.
In 2007 and early 2008—as detailed in Chapter 5—the most educated
economists in the profession predicted that the macroeconomic “track” was still
pointing straight ahead. Like their colleagues in the caboose, they were simply
describing the state of the past while marketing it as a prediction. Figure 26 shows
that people relying upon such statements suffered terrible injury when the train
careened off the rails and crashed.