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EC202: Worked Example #3.10 Frank Cowell April 2006
This presentation covers exactly the material set out in the file WorkedExamples.pdf, but with the addition of a few graphics and comments To start the presentation select Slideshow\View Show or click on icon below left. Mouse click or [Enter] to advance through slide show
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WX3.10: Labour supply Part 1: Check out the utility function
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WX3.10: CES, special cases x1 s 0 x2 x1 s = 1 x2 x2 x1 s
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WX3.10: Labour supply Part 2: derive individual’s behavioural responses
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WX3.8: Set up optimisation problem
Budget constraint Transform utility function Substitute in budget constraint
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WX3.8: Solve optimisation problem
FOC for an interior maximum Rearrange this: Get the labour supply function
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WX3.8: Check labour supply function
From the FOC This must be less than 1 But if M were too large expression would be negative So we have constraint on w for positive h Individual chooses not to work if Where h is positive:
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WX3.10: Labour supply Part 3: Characterise behaviour for people of different types
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WX3.8: Comparative statics for w
Differentiate h with respect to the wage Evaluate this Rearrange Work may decrease with the wage rate if s < 1 and M is small.
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WX3.8: Effect on consumption
From labour-supply function and the budget constraint: Differentiate this with respect to the wage
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WX3.8: Consumption for different types
Consumption (disposable income) is higher for higher w Consumption is higher for workers than non workers Only low ability people choose not to work Higher ability people enjoy higher consumption
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WX3.10: Labour supply Part 4: Apply results to tax system
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WX3.10: Use comparative statics
Given restriction on s… …lower w means lower h But tax lowers wage from w to [1t]w Also benefit B raises consumption of leisure and other goods So tax-transfer system causes people to work less
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