Weekly jobless claims fall to 422,000 from 428,000
Four-week claims average drops 14,000 to 425,500
Continuing U.S. claims dip 1,000 to 3.7 million
First-quarter producitivity revised up to 1.8%
Unit labor costs revised down to 0.7%
Manufacturing productivity revised down to 4.2%
8:30 a.m. June 2, 2011