Job reports can be confusing, especially January job reports -- Daniel Indiviglio, the Atlantic's business editor, puzzled over the report for Jan. 2010, and was so puzzled by the Jan. 2011 report he devoted 3 columns to it:
Measurement of Unemployment by Katherine Bradbury, Public Policy Brief No. 06-2 from the Federal Reserve Bank of Boston. Draft of article published in the Palgrave Dictionary of Economics . Good on international measures and how they differ.