The numbers on the sharp GDP improvement in the Japanese economy for the third quarter were not correct. The Japanese government says that they were not even close.
Originally, the data showed the economy grew at an annual rate of 4.8%. That figure has been revised to 1.2%, which is barely better than stagnation. The major culprit for the error was an overestimate of capital investment.
The information was off by enough to lead to questions about economic data in other large countries. A number of experts have noted that the US November unemployment numbers which showed a loss of only 11,000 jobs are distorted. A major criticism is that the system does not effectively project data from companies that do not respond to the Bureau of Labor Statistics questionnaires. Some of the firms that do not respond may actually not be in business.
Government policy based on faulty data is in some ways no policy at all. The November jobs data in the US may be like the Japanese GDP number. It is one snapshot of one part of the economy at a given time. That makes the odds that it is wrong fairly high.
Douglas A. McIntyre