The Significance of PED for Different Stakeholders

Exam code: 2281

Written by: Ashika|Reviewed by: Caroline Carroll|Updated 2 July 2026

Consumers and firms

Understanding price elasticity of demand (PED) is essential for analysing how consumers, firms, workers, and governments respond to changes in price
By applying knowledge of PED, economic agents can make more informed and effective choices

Consumers and PED

Understanding PED helps consumers make better purchasing decisions, especially in price-sensitive situations
- When demand for a product is elastic, consumers can easily switch to substitutes when the price rises
- When demand is inelastic, there may be fewer alternatives (e.g. essential medicine or utilities), so consumers must pay even if the price increases
- Informed consumers can adjust their spending by identifying products where price changes will affect their overall budget more significantly
  - For example, a consumer in Panama may reduce consumption of imported apples when prices rise, but not cut back on beans, which are more price inelastic

Firms and PED

Firms use PED to decide pricing strategies that maximise revenue and profits
- If demand is price inelastic, a price increase will lead to higher total revenue
  - (TR rises even if fewer units are sold)
- If demand is price elastic, a price decrease can increase total revenue by attracting more customers.
- Firms may also use price discrimination: charging higher prices to inelastic segments (e.g. peak train tickets) and lower prices to elastic ones (e.g. student discounts)

Case study

Coca-Cola’s “Mini-can” strategy in the United States

Context

In the early 2010s, Coca-Cola noticed a drop in soft drink sales in the United States. Health-conscious consumers were becoming more price- and calorie-sensitive, especially in response to rising concerns about sugar and obesity. Standard-sized cans were facing falling demand

Using PED knowledge

Coca-Cola recognised that demand for sugary drinks had become more price elastic — consumers were more responsive to price changes and increasingly switched to alternatives like bottled water or fruit juices

Instead of simply lowering the price, Coca-Cola introduced smaller “mini-cans” (7.5 oz) at a higher price per litre than the regular size.

This pricing strategy used PED insights to

Appeal to health-conscious buyers (lower calories)
Retain brand perception as a premium product
Increase total revenue despite selling less volume

The outcome

The mini-can campaign was a success
- Sales volume stabilised, especially among younger consumers
- Revenue per can increased, as consumers were willing to pay a higher price for smaller, more health-aligned products
- Coca-Cola strengthened its position in a market where demand was becoming increasingly elastic

Why it worked

By understanding that demand had shifted from relatively inelastic to more elastic, Coca-Cola adapted its product and pricing to match consumer responsiveness — a textbook application of PED analysis

Workers and governments

Workers

Workers may use PED knowledge when choosing which industries to work in or when negotiating wages
- Industries producing price inelastic goods (e.g., electricity, fuel) tend to have more stable employment and revenue
- Workers in sectors with price elastic demand (e.g., luxury fashion, entertainment) may face more uncertainty, as demand drops sharply with price increases
- Trade unions may use PED data to argue that wage increases won’t reduce demand for labour, particularly in inelastic sectors
For example, a software developer may choose employment in the cloud computing industry (relatively inelastic demand) rather than mobile gaming (more elastic and volatile)

Governments

Governments use PED to design effective taxation and subsidy policies
- For taxation:
  - Taxing price inelastic goods (e.g. petrol, tobacco) generates high revenue with minimal reduction in consumption
  - Consumers bear most of the tax burden as they are less responsive to price changes
- For subsidies:
  - Subsidising price elastic goods (e.g. solar panels, public transport) can cause a greater than proportional increase in demand, encouraging wider use
- PED also informs regulation, such as whether a product should face price controls or income support (e.g., staple foods)

Case study

Colombia’s cigarette tax and price inelastic demand

Context

In 2016, the Colombian government introduced a significant tax increase on cigarettes, doubling the excise tax as part of a wider effort to reduce smoking rates and increase public health funding. The move was also designed to boost government revenue

Using PED knowledge

The government recognised that cigarettes are price inelastic in demand. People who smoke tend to be addicted and continue to buy them even if prices rise

This meant a higher tax would not reduce sales drastically, but it would increase the amount consumers spent
The majority of the tax burden would fall on the consumer, and firms could pass on the tax without losing significant demand

The outcome

Tobacco tax revenue rose by over 50% in the first year following the increase
Smoking rates fell slightly, but not significantly — confirming the inelastic nature of demand
The government used the extra revenue to fund healthcare programmes, including campaigns to discourage youth smoking

Consumers and firms

Consumers and firms

Consumers and PED

Firms and PED

Workers and governments

Workers and governments

Workers

Governments

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