Wage differentials are coz
1.	Labour market imperfections(monopolies,no info),Non homogeneity,Barriers to mobility
Search theory - wage lower if searched for long time
2.	Education&training - human capital investment.Demand for skilled rises&unskilled falls
3.	Working conditions+Non-monetary rewards
4.	Regional variations - employers go to low wages,employees to high,so equilibrium occurs
5.	Wage discrimination - age,sex,race.Women earn 20% less,black 17%less
They dont get better jobs&are not promoted
6.	Vocationalism(job like leisure or hobby,nursing)
1970 Equal Pay Act,1975Sex discrimination,1976 Race relations

 Supply side:
1.	Monopoly restricts the employment of a labour,because it has to pay more to existing
2.	Supply of labour depends on population&is highly inelastic
3.	The leisure preference might make the supply curve to slope backwards
4.	Occupational&geographical immobility exists
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{info author|Keith Siilats}, {DATE|21/05/96}, Subject: {info subject|Economics revision}, Words: {info numwords|1}

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