The Labour Supply Curve Facing a Monopsonist Is Positively Sloped

Multiple Choice

The labour supply curve facing a monopsonist is positively sloped because:

A) the monopsonist must pay a higher wage if it wishes to attract more labour.
B) these workers are scarce and drive up the wage rate.
C) government intervenes in the labour market.
D) the monopsonist only hires skilled labour.