2.13 - Importance of PED
The importance of PED for firms' revenue decisions
Price elasticity of demand (PED) measures how sensitive the quantity demanded of a good or service is to changes in its price. For firms, understanding PED is essential as it helps forecast how price adjustments will impact total revenue.
Predicting revenue changes from price adjustments
Firms can use PED to decide whether to raise or lower prices to boost revenue.
How PED affects revenue decisions:
Whether a price change raises or lowers revenue depends on how large the quantity response is compared with the price change that caused it.
| Demand condition | Price change that raises revenue | Why revenue moves that way | Coffee shop example |
|---|---|---|---|
| Price elastic (PED greater than 1) | A price reduction | The percentage rise in quantity demanded exceeds the percentage fall in price | With many similar coffee shops nearby, raising prices makes customers switch, so revenue falls |
| Price inelastic (PED less than 1) | A price increase | The percentage drop in quantity demanded is smaller than the percentage rise in price | Where customers value the unique experience and have few alternatives, raising prices leaves sales broadly intact and revenue grows |
How PED affects tax shifting for firms
PED also influences how firms handle indirect taxes, such as value-added tax (VAT), by determining how much of the tax burden can be passed on to consumers through higher prices.
Shifting indirect taxes to consumers
The more inelastic the demand, the larger the share of the tax that firms can shift to consumers without losing significant sales volume.
Why inelastic demand helps tax shifting:
- With inelastic demand, consumers are less responsive to price increases because substitutes are scarce, so quantity demanded falls only slightly.
- For instance, a luxury watchmaker facing inelastic demand can pass most of a new luxury tax to consumers without significantly affecting sales volume.
PED in government tax revenue strategies
Governments rely on PED when designing tax policies to generate revenue, as it affects how consumption responds to tax-induced price changes.
Maximising tax revenue through PED
Tax revenue equals the tax per unit multiplied by the quantity consumed after the tax.
How PED affects government tax revenue:
- Goods with low PED (inelastic demand) yield higher tax revenues because price increases from taxes lead to only small reductions in quantity demanded.
- Governments often target necessities with inelastic demand for taxation to ensure stable revenue streams.
- For example, governments often impose taxes on necessities like household utilities because demand remains relatively stable despite price increases.
Using PED to reduce consumption of demerit goods
PED assists governments in setting taxes on demerit goods, products harmful to individuals or society, to discourage their use.
Setting taxes to curb demerit good consumption
For demerit goods with inelastic demand, such as addictive items, governments must impose high taxes to achieve meaningful reductions in consumption.
How PED helps determine tax policy:
- PED calculations help determine the tax rate needed to meet specific targets for lowering demand.
- For instance, to reduce consumption of energy drinks by 15%, policymakers need to understand the drinks' PED to calculate the appropriate tax rate.