What is not a characteristic of a perfectly competitive labour market?

Which of the following factors will make a labour market less competitive?

Taki

hopes to become a dentist one day. In the meantime, like many of his friends,

he is selling sweets at the local taxi rank. The following diagram shows his

cost and revenue curves. 

Given

the market price, the Taki's total cost per day is

The ________ effect of a wage increase states that a higher wage rate increases workers' real income, and thus increases their demand for all normal goods, including leisure, which decreases the quantity of labour supplied.