massachusetts lnstitute of technology professor david autor has tracked the polarization of jobs in the United states over the last three decades. he finds that job
op-portunities are declining in middle-skill white-collar and blue-collar jobs,largely due to a combination of the automation of routine work,and global offshoring.2 Conversely,job opportunities are increasingly concentrated in both highskill, high-wage professional, technical and management occupations and in low-skill, low-wage occupations such as food service and personal care. jobs at the high-skill end involve abstract tasks, and at the low-skill end, manual tasks.