Consumer Behaviour and Elasticity — Data Response Practice

Edexcel IAL Economics Unit 1 (WEC11)

Stimulus

India's telecom price war ends as Jio, Airtel and Vi raise tariffs

India's mobile data market, long known for some of the cheapest tariffs in the world, saw its first coordinated round of price rises in several years during 2024. Reliance Jio, Bharti Airtel and Vodafone Idea (Vi) each raised entry-level prepaid plan tariffs by between 11% and 25%, marking the end of a prolonged period of below-cost pricing that had been used to build market share. Jio's popular INR 239 monthly plan moved to INR 299, a rise of around 25%. Airtel's comparable plan moved from INR 265 to INR 299, a rise of roughly 13%.

Analysts at Mumbai-based research house IndiaTel Insight report that industry-wide subscriber numbers fell by around 2.5% in the three months following the price rise, but Jio and Airtel retained most of their base while Vi lost a disproportionate share. Average revenue per user (ARPU) for Jio rose by approximately 15% quarter-on-quarter, suggesting demand is relatively price inelastic in a country where mobile data has become essential for payments, government services and employment.

At the same time, consumer spending patterns in India are shifting with rising incomes. According to a 2024 report from the National Council of Applied Economic Research, spending on "premium" smartphones (priced above INR 30,000) grew by approximately 18% year-on-year in 2023–24, while spending on entry-level handsets (below INR 10,000) fell by around 4%. Streaming services such as JioHotstar and Netflix India have also seen growth, with reports suggesting that a 10% rise in disposable income among urban middle-class households is associated with an approximately 17% rise in spending on subscription video services.

Table 1: Estimated elasticities for selected Indian consumer markets (2024)

Source: Synthesis of IndiaTel Insight and NCAER estimates, 2024.

Questions

Question 1 (2 marks) — Calculate the percentage change in quantity demanded for Jio's entry-level plan following the 25% price rise, using the price elasticity of demand (PED) value given in Table 1.

Question 2 (6 marks) — Analyse the likely impact of rising household incomes in urban India on the market for premium smartphones, using income elasticity of demand (YED) evidence from the stimulus.

Question 3 (10 marks) — Evaluate the significance of price elasticity of demand (PED) for the pricing and revenue strategies of Reliance Jio.

Model Answers

Question 1 (2 marks)

Using the PED formula: %ΔQd = PED × %ΔP = -0.35 × 25% = -8.75%. Quantity demanded for Jio's entry-level plan is estimated to fall by approximately 8.75% following the 25% price rise. This is consistent with the relatively small fall in subscriber numbers reported in the stimulus.

Examiner note: Full marks require the calculation shown and a one-line interpretation. A common mistake is dropping the negative sign, or calculating -0.35 × 25 = -8.75 but writing "8.75% increase".

Question 2 (6 marks)

Income elasticity of demand (YED) measures the responsiveness of quantity demanded to a change in consumer income. From the stimulus, premium smartphones in India have an estimated YED of +1.7, which is positive and greater than one, meaning they are income-elastic luxury goods.

Applied to the Indian urban market, rising real incomes — for example among the middle class that is upgrading its consumption basket — will cause a more-than-proportionate rise in demand for premium smartphones. This is supported by the stimulus, which reports that spending on smartphones above INR 30,000 grew by approximately 18% year-on-year, while entry-level handset spending (YED of -0.4, indicating inferior goods) fell by around 4%.

The chain of reasoning is: rising disposable incomes shift the demand curve for premium smartphones rightward, which leads to higher equilibrium quantity at each price level, which in turn incentivises manufacturers such as Apple and Samsung to expand local production capacity. For example, Apple's ongoing expansion of iPhone assembly in India fits this income-driven demand shift. The result is a structural rebalancing of the Indian handset market away from inferior entry-level devices towards luxury premium devices.

Examiner note: A Level 3 (5–6) answer uses the YED value (+1.7) explicitly, states that it is greater than one (luxury), and connects to the 18% growth figure. A Level 2 (3–4) answer correctly identifies the good as a luxury but does not quantify the relationship or apply stimulus data. The specific move that separates them is quantifying the shift using the elasticity value.

Question 3 (10 marks)

Price elasticity of demand (PED) is central to Jio's revenue strategy because it determines how total revenue responds to a price change. Total revenue equals price × quantity; if demand is price inelastic (|PED| < 1), then a price rise causes a less-than-proportionate fall in quantity demanded, so total revenue rises. The stimulus gives a PED of -0.35 for entry-level prepaid mobile data in India, suggesting demand is inelastic. This explains why Jio's 25% price rise was accompanied by a 15% rise in ARPU in the following quarter, even though total subscribers across the industry fell by around 2.5%. The strategic implication is that, having built a dominant market share during the low-pricing era, Jio can now raise prices to extract higher revenue per user, improving operating margins.

However, there are several limitations to relying on PED alone. First, PED values are typically estimated over a short time horizon; in the long run, users may switch to alternatives such as Wi-Fi offloading, satellite-based providers, or lower-tier competitors, making demand more elastic. The stimulus notes that Vi lost a disproportionate share of subscribers, which is consistent with cross elasticity of demand (XED = +0.9 between Jio and Airtel) implying relatively close substitutes. If Jio raises prices without matching feature improvements, the XED of +0.9 suggests subscribers may migrate to Airtel, eroding the revenue gain over time.

Second, PED is not constant along a demand curve or across market segments. Price-sensitive lower-income users — particularly in rural states — may have a higher PED than +0.35, meaning the revenue benefit is smaller for this segment. There is also a regulatory risk: the Telecom Regulatory Authority of India (TRAI) could intervene if prices rise rapidly in what is considered an essential service, particularly given mobile data's role in digital payments and government service delivery.

Third, relying on an inelastic PED assumes low availability of substitutes. As new entrants (for example, Starlink or other satellite broadband providers) scale in India, substitutability may increase, pushing PED closer to unity over time.

In evaluation, PED is a necessary but insufficient guide to pricing strategy for Jio. In the short run, the -0.35 value supports raising tariffs and strengthens total revenue, which matches the 15% ARPU rise in the stimulus. In the long run, XED with Airtel, time lags in consumer switching, and regulatory scrutiny mean Jio cannot repeat this strategy indefinitely. The judgement is that PED is highly significant as the immediate justification for the 2024 price rise, but sustainable revenue growth will depend on non-price factors such as network quality and bundled content.

Examiner note: Level 4 (9–10) answers explicitly quantify using both PED (-0.35) and XED (+0.9), reach a conditional judgement about short-run vs long-run, and name at least one real-world evaluator (regulatory risk, substitutability, time lag). Level 3 answers tend to describe PED without linking to Jio's actual revenue outcome. A common mistake is forgetting that PED changes over time and across segments.

Common Mistakes

• Mixing up PED, YED and XED. Fix: remember the numerator (always %ΔQd) and identify the denominator — price, income, or the price of another good.
• Interpreting a negative PED as "bad". Fix: all ordinary goods have negative PED; the magnitude (|PED|) is what matters for the elastic/inelastic classification.
• Stating a good is a "luxury" or "necessity" without using the YED value. Fix: YED > 1 = luxury, 0 < YED < 1 = necessity, YED < 0 = inferior. Back every claim with the number.

Diagram Reference

This data-response uses the following diagram from the Revvy Learn diagram library:

• supply-demand-equilibrium.svg — base framework; the stimulus illustrates shifts along and of the demand curve in response to price, income and cross-price changes

(Three dedicated elasticity diagrams are on the v2 backlog: an inelastic-demand curve with revenue rectangle for PED; a rightward demand shift for a luxury good showing positive YED; and a demand-curve shift for substitutes showing positive XED. Students should draw these manually in the interim — practising the drawing is itself a mark-earning skill.)