The national unemployment rate fell to 4.7 percent in February, the Labor Department reported Friday. But relying on that one headline number as an indicator for the economy as a whole ignores import information just below the surface. Each month on "Jobs Friday," the Bureau of Labor Statistics puts out a trove of economic data, each of which provides its own perspective on the labor market and the employment situation. Economists look past the official unemployment rate — that 4.7 percent figure, also known as the "U-3" — to other metrics that give their own view of jobs in the...