Study Notes
Wage Rises - Income & Substitution Effects (Labour Markets)
- Level:
- A-Level, IB
- Board:
- AQA, Edexcel, OCR, IB, Eduqas, WJEC
Last updated 21 Mar 2021
This analysis looks at the individual labour supply decision and in particular the work-leisure trade off and how this is affected by a change in wages.
- Most individuals face a choice between hours worked and hours of leisure
- The opportunity cost of taking leisure is the monetary value of the wages foregone
- A change in the wage rate has both an income effect and a substitution effect
The income effect of a rise in the hourly wage rate
- Positive income effect: When higher wages cause people to want to work more hours in order to reach a target / desired income
- Negative income effect: When a target income has been reached and people prefer spending more time on leisure rather than earning more income
The substitution effect of a rise in the hourly wage rate
- A rise in the real wage increases the opportunity cost of leisure
- Therefore higher wages will always cause people to be incentivised to work longer hours via the substitution effect
- But the income effect may work in the opposite direction

Some people may have a backward bending individual labour supply curve – they may choose to work fewer hours when the wage rate rises (ceteris paribus)

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