Quantity of labour supplied depends upon various factors:
Wage: This is the primary factor determining labour supplied
and varies directly with it. An increase in wages would increase
labour supplies and vice versa.
Non Labour income: People with greater non labour income tend
to work less than those with no income. This is because at higher
income levels, the income effect because of non labour income
outstrips substitution effect.
Non Monetary benefits: When non monetary benefits are
lucrative, labour supplied increase despite constant wages.