The percentage of men in the labor force has fallen faster and further in the U.S. in recent decades than in almost any rich country, a trend White House economists have termed “troubling” and pinned on a lack of employer interest in low-skilled work.

The share of men between the ages of 25 and 54 in the job market has been falling for more than six decades, a phenomenon spotlighted in a 48-page paper released by President Obama’s Council of Economic Advisers Monday.