Unions & Wages
Unions may try to use their collective bargaining power to get higher wages for members
For this to be effective then the union needs to have a degree of control over the labour force and therefore the total labour supply
The extent to which unions can impact wages depends on:
The level of unemployment & Competition
If demand for labour is elastic then unions can force wages higher but quantity demanded will decrease
If demand for labour is inelastic than unions will be more effective at rising wage levels
Many markets that have unions have more elastic demand for labour therefore unions have less influence on wage rates