U.S. jobs progress still far short of Fed's 'substantial' tripwire

By Howard Schneider WASHINGTON (Reuters) - The U.S. job market may have picked up steam in March, but the improvement was only a small step towards the Federal Reserve's threshold for considering reining in its massive support for the economy. That's the signal from a broad index of labor market indicators developed by Cornerstone Macro economist Roberto Perli and which includes an array of statistics U.S. central bank officials have placed at the center of their analysis of the economy. Perli's index, using data since 1990, improved following the addition of nearly a million jobs to U.S. payr...