John Bates Clark,
Essentials of Economic Theory
“ How Improvements which call Labor to a Particular Establishment may displace Labor from a Group.—Another typical case is afforded when some one employer has for a time the exclusive use of a labor-saving device, and pushes his production to the utmost in order to get the full benefit from it. Here are seen the more characteristic effects of such an improvement. It draws labor to the employer who for the time being monopolizes the new instrument of production, but it turns labor from the subgroup of which this employer is a member. ”
