America's Productivity Plunge Explained

For the first time since the financial crisis, US multifactor productivity growth turned negative last year, mystifying economists who have struggled to find something to blame for the fact that worker productivity is declining despite a technology boom that should make them more efficient – at least in theory.
To be sure, economists have struggled to find explanations for the exasperating trend, with some arguing that the US hasn’t figured out how to properly measure productivity growth correctly now that service-sector jobs proliferate while manufacturing shrinks.