This blog post originally appeared on RealMoney Silver on Aug. 2 at 8:15 a.m. EDT.U.S. corporations have a renewed emphasis on temporary hirings at the expense of permanent job placements. Years ago, inventory on-demand solutions arose at manufacturing companies around the world, resulting in improved returns on industrial invested capital and corporate profitability both in the U.S. and abroad. Not surprisingly, today, the trend of a broader use of temporary workers is the next generation of return optimization in an age of broad uncertainty and a wider-than-usual set of economic outcomes. Prior to the 2008-2009 Great Decession, temporary employment growth has signaled permanent hiring strength. The chart below plots the year-over-year percentage change in temporary jobs in the U.S. against the overall rate of change in overall nonfarm employment.