The federal government has not meaningfully measured the contingent workforce since 2005. However, two economists, Lawrence Katz (Harvard) and Alan Krueger (Princeton), conducted a 2015 survey that is currently acknowledged as the best available measurement of the contingent workforce to date. And when Monique Morrissey, an Economist with the Economic Policy Institute, testified before the U.S. Senate Health, Education, Labor & Pensions Subcommittee early last month, she cited some data from this study.