Economists had expected 180,000 new jobs in February. Not even close: Hiring tumbled as US employers added just 20,000 jobs last month, the fewest in nearly a year and a half. The Labor Department says the unemployment rate fell to 3.8% from 4%. Businesses stepped up their competition for workers and raised average hourly pay 3.4% from a year earlier, the largest gain in a decade. The sharp slowdown in hiring, which may have been worsened by unseasonably cold weather, comes after employers added a blockbuster 311,000 jobs in January, the most in nearly a year. In the past three months, job gains have averaged 186,000. Three takes: