The Wave Of Layoffs: Is It Bound To Get Bigger?
December unemployment rate was 4 percent, only tenth of percentage point above its lowest level in 30 years, even as announcements of layoffs reached their highest level in seven years; apparent contradiction reflects nothing more than timing; low unemployment rate gives picture of where economy has been, not where it is going; number can distort reality during turning points in economic cycle; as announced layoffs take effect, unemployment rate will start rising, perhaps as soon as Feb 2, when government releases next jobs report (M)