Transfer Earnings and Economic Rent in Factor Markets

Tick each line you got. Your score builds from the marks on the scheme.

• identifies that transfer earnings are the minimum payment needed to keep a factor in its current use, shown as the area under the supply curve.1 mark
• identifies that economic rent is the area above the supply curve but below the equilibrium wage line.1 mark
• identifies that the footballer has a highly inelastic supply, since very few people have comparable talent and there are few close substitutes.1 mark
• explains that this means the footballer would likely stay in the sport for a wage far below their actual earnings, so most of the actual wage is economic rent.1 mark
• identifies that the shop worker faces a highly elastic supply, since many people are able and willing to do similar work with little specific training.1 mark
• explains that competition between many potential shop workers keeps the wage close to what workers could earn elsewhere, so most of the wage is transfer earnings.1 mark
• correctly links the diagrams, e.g. a steep (inelastic) supply curve for the footballer versus a flatter (elastic) supply curve for the shop worker.1 mark
• concludes clearly that the proportion of earnings made up of economic rent rises as the elasticity of supply of the factor falls.1 mark

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Tick each line you got. Your score builds from the marks on the scheme.

• Limited knowledge of transfer earnings or economic rent; little or no application; no clear analysis.4 marks
• Accurate knowledge of the distinction between transfer earnings and economic rent; some application to taxation; one developed chain of analysis.4 marks
• Constructs a developed chain of analysis showing that taxing pure economic rent does not reduce the quantity of the factor supplied, since the after-tax payment can still exceed the factor's opportunity cost elsewhere, so such a tax causes no loss of output or employment; begins to evaluate against a practical limitation.4 marks
• As Level 3, with a well-substantiated evaluation and a supported final judgement.4 marks
• Specific content that can gain credit: in theory, a tax on pure economic rent is efficient, because the factor remains in its current use even after the tax, as its after-tax payment can still exceed what it could earn elsewhere, so there is no deadweight loss, unlike a tax on transfer earnings, which can push a factor's after-tax payment below its opportunity cost and cause it to leave that use; the practical difficulty is that government cannot easily observe how much of an individual's actual earnings is transfer earnings and how much is economic rent, since this requires knowing the true next-best alternative income for that specific person, making a precisely targeted 'rent tax' hard to design and administer; a real-world example of a tax aimed at rent-like profit is a windfall tax on the profits of oil and gas producers, such as the UK's Energy Profits Levy introduced in 2022, intended to capture returns above what firms needed to keep investing in that sector; a supported conclusion should note that the argument is theoretically strong but practically difficult, since a poorly targeted rent tax risks unintentionally taxing transfer earnings and reducing supply.4 marks

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