Managerial Economics – Retail Strategy Under Changing Economic Conditions

Case Study: Shoprite’s Strategic Position in the South African Retail Market Shoprite Holdings operates across several segments of the South African retail market through brands that serve consumers with different income levels and purchasing

preferences. Its business model incorporates physical stores, private-label products, digital retailing, last-mile delivery, extensive distribution networks and alternative revenue streams. South African retailers operate in an economic environment characterized by low overall economic growth, persistently high unemployment, changing interest rates, pressure on household disposable income and differences between general inflation and inflation in specific expenditure categories. Statistics South Africa reported annual consumer inflation of 3.6% in December 2025, while food and non-alcoholic beverage inflation was 4.4%. The official unemployment rate was 31.4% in the fourth quarter of 2025.

Although lower inflation and interest-rate reductions may support household expenditure, consumer responses are unlikely to be uniform. Lower-income households generally allocate a larger proportion of their budgets to essential goods, while higher-income consumers have greater scope to alter product quality, brand, store, delivery method and purchasing frequency. Shoprite’s 2025 reporting also emphasizes supply-chain capacity, private labels, digital channels and an omnichannel retail strategy.

Assume that Shoprite’s management is considering the following strategy:

Expand Checkers Sixty60 into additional lower-income and smaller urban markets, increase the proportion of private-label products sold through the platform and introduce differentiated delivery charges according to order size, delivery time and customer location.

Management estimates the following demand relationship for monthly online grocery orders:

Q_d = 82 000 − 1 800D + 950I − 1 200C + 2 400P

Where:

Q_d= monthly online grocery orders;

D= average delivery charge, measured in tens of rand;

I= index of real disposable household income;

C= average delivery time in hours; and

P= promotional and loyalty incentive index.

The regression has an adjusted R²of 0.71. The delivery-charge and delivery-time coefficients are statistically significant at the 1% level, the promotional coefficient at the 5% level, and the income coefficient at the 10% level.

Required

Acting as a managerial economics consultant, prepare a critical advisory report evaluating whether Shoprite should implement the proposed expansion strategy.

Your answer must integrate the following into one coherent analysis:

The influence of inflation, unemployment, interest rates, disposable income and technology on demand for online grocery services;

Whether the proposed strategy is likely to cause movements along the demand curve, shifts of the demand curve, or both;

Interpretation of the signs, magnitudes, statistical significance and explanatory power of the estimated regression model;

The probable price, income and cross-price elasticity differences between lower-income and higher-income customer segments;

The effects of differentiated delivery charges and private-label expansion on revenue, market share and customer welfare;

Consumer equilibrium and the budget-allocation choices households may make between branded products, private-label products, delivery services and physical-store shopping; and A final recommendation specifying the conditions under which the expansion should proceed, be redesigned or be rejected.

Your recommendation must recognize that a strategy may increase sales volume without necessarily maximizing profit or long-term firm value.

QUESTION 2                                                                                                                        [20]

SASOL’S ENERGY-TRANSITION INVESTMENT DECISION

Case Study: Balancing Current Production and Long-Term Transition

Sasol faces a complex managerial problem. It must maintain reliable and profitable energy and chemical production while responding to carbon taxation, energy-transition pressures, changing technologies and uncertainty surrounding future input supplies. Sasol reported that South Africa’s carbon-tax rate increased to R236 per tonne from January 2025. Its reporting also highlights the importance of emissions reductions, operational resilience and investment in lower-carbon production. Management must choose between two mutually exclusive investments at one production facility.

Project A: Production-Efficiency Upgrade

This project would improve the existing production process, reduce short-run operating interruptions and increase current output. However, it would preserve substantial dependence on carbon-intensive inputs.

Project B: Lower-Carbon Process Conversion

This project would initially produce smaller operating savings but would reduce emissions exposure and potentially improve the firm’s long-term strategic position.

For purposes of this assessment, use the following projected information:

Management has also identified the following risks:

If carbon-related costs rise more rapidly than expected, Project A’s net cash inflows from Years 3–5 would be 20% lower.

If lower-carbon technology does not perform as expected, Project B’s Years 1–3 cash inflows would be 15% lower.

Undertaking either project prevents the firm from undertaking the other for at least five years. The facility is presently producing below its technically efficient capacity because of periodic energy and input constraints.

Sources:

Required

Prepare an investment and production decision memorandum for Sasol’s executive committee.

Your memorandum must:

calculate and compare the NPV of both projects at the 11% discount rate; recalculate the relevant project NPVs under the two risk scenarios;

distinguish accounting cost, economic cost, sunk cost, opportunity cost and external cost in the context of the decision;

explain why selecting the project with the largest undiscounted cash inflows could result in a suboptimal decision;

evaluate the existing plant using a production possibility frontier or an equivalent production- efficiency framework, including the meaning of operating inside the frontier and the conditions necessary to shift the frontier outward;

relate the investment decision to short-run and long-run production costs, economies of scale, technological change and marginal decision-making;

evaluate whether environmental and carbon-related costs should be treated only as compliance costs or as economically relevant strategic costs; and

make a final recommendation that remains defensible under both the base case and the adverse scenarios.

A recommendation based only on the base-case NPV, without consideration of risk, opportunity cost and production consequences, will not receive full credit.

QUESTION 3                                                                                                                        [15]

TAKEALOT, PLATFORM POWER AND COMPETITION STRATEGY

Case Study: Competing With the Marketplace That Hosts Your Business

The Competition Commission’s Online Intermediation Platforms Market Inquiry found that Takealot held a leading position in South African e-commerce and that many smaller sellers were highly dependent on its marketplace and fulfilment infrastructure. The Commission identified concerns arising from Takealot simultaneously setting marketplace rules and competing with third-party sellers through its own retail operations.

The Commission also concluded that Takealot’s narrow price-parity clause restricted sellers from charging lower prices through their own direct channels, thereby reinforcing marketplace dependence and Takealot’s market power. It required the clause to be removed. The Commission further considered the competitive implications of pricing below variable cost and stated that such conduct by a dominant platform could, in particular circumstances, be regarded as predatory.

Consider a small South African electronics business, Eastern Tech Traders, that currently generates 75% of its online sales through Takealot. It faces the following choices:

Required

Advise Eastern Tech Traders on how it should compete without becoming commercially irrelevant or engaging in unlawful conduct.

Your answer must:

Determine which market structure or combination of market structures best describes the relationship between Takealot, competing platforms and marketplace sellers;

Distinguish market leadership, market power, monopoly power and an oligopolistic strategic advantage;

Analyze network effects, economies of scale, switching costs, seller dependence and barriers to entry;

Evaluate uniform pricing, channel-specific pricing, price discrimination, below-cost pricing and product differentiation;

Assess the possible efficiency benefits and consumer-welfare costs of a dominant digital marketplace;

explain why a strategy that appears profitable in the short run may weaken the seller’s long- run competitive position;

distinguish vigorous price competition from predatory pricing or exclusionary conduct; and formulate a practical competition strategy covering pricing, distribution channels, service differentiation, costs and customer acquisition.

The final advice must identify the economic trade-offs of the recommended strategy rather than assuming that complete independence from the platform is automatically desirable.

QUESTION 4                                                                                                                        [15]

HOUSEHOLD BUDGET PRESSURE AND A RETAILER’S RESPONSE

Case Study: Responding to Unequal Consumer Conditions

South African firms cannot treat the “average consumer” as though all households face the same economic circumstances. In December 2025, food and non-alcoholic beverage inflation was above headline inflation, while official unemployment remained above 30%.

These conditions can affect consumer welfare even when overall inflation appears relatively moderate.

At the same time, the South African Reserve Bank reported that lower inflation and lower interest rates had supported household spending, although investment remained weak and economic growth was not yet considered healthy.

Assume a national retailer is considering three responses:

Strategy A: Reduce package sizes while keeping nominal prices relatively stable. Strategy B: Expand low-cost private-label products and reduce the range of premium brands.

Strategy C: Use customer data to offer personalized discounts based on purchasing history, location and estimated price sensitivity.

Management expects each strategy to influence consumers differently. Strategy A may preserve affordability but increase the price per unit. Strategy B may improve access to basic goods but reduce product variety. Strategy C may increase sales and improve targeting but may charge different effective prices to customers buying similar products.

Required

Critically evaluate the three strategies and recommend the most economically and ethically defensible response.

Your evaluation must integrate:

Consumer preferences, utility maximization, indifference curves and budget constraints; Income and substitution effects caused by changing prices and real household income; The likely effect on normal goods, inferior goods, necessities and discretionary products; Price, income and cross-price elasticity;

Information asymmetry and behavioral responses to package size and promotional framing; First-, second- and third-degree price discrimination, where applicable;

The effects on consumer surplus, producer surplus, revenue and economic welfare; The distributional consequences for low-income and higher-income households;

The possible tension between profit maximization and longer-term customer trust; and The broader managerial-economic implications of inequality, data analytics and emerging technologies.

The recommendation must state whether one strategy should be selected, whether a combination should be used, and which safeguards or limitations management should impose.

Experts Answer on Above Economics Questions

Shoprite and Checkers Sixty60

The strategy proposed is to perform expansion of Sixty60 into lower income and smaller urban markets, increase private label products and apply differentiated delivery charges on the basis of size of order, delivery time and customer location.

Impact of inflation, unemployment, interest rates, income and technology on demand

Price is the major factor for lower income households in South Africa, and the higher inflation level also limits the availability of money for grocery purchases among retailers. As a result, the impact on Sixty60 is mixed as the higher inflation would restrict lower income buyers to purchase food products that are accompanied with delivery fees. The high unemployment rate also becomes a major concerning factor for Sixty60 but the use of digital channels and last mile delivery make Sixty60 more convenient and allow SHoprite to target smaller urban markets without relying extensively on physical stores.

Movement along the demand curve or shift of demand curve

Both are possible because a change in the delivery charge will result in a movement along the demand curve, and an increase in D reduces predicted orders. It implies that if Shoprite lowers delivery time and increases loyalty incentives while changing delivery fees, it will result in a movement along the demand curve and also a shift in the demand curve.

Analysis of regression

The analysis of the data indicates that the delivery charge and delivery time is significant at 1% as the data clearly indicates strong statistical evidence. The promotion is significant at 5% while the income at 10% which implies that the income relationship is supported less strongly than the delivery variables. It implies that Shoprite should prioritise delivery economics and service speed rather than simply considering the fact that lower-income markets will generate sufficient demands.

Price, income and cross price elasticity by customer segment

The elasticity for the lower income and higher income customer should not be considered the same because lower income customers are likely to have more price elastic demand, and respond strongly to private label prices, and have less capacity to absorb higher delivery charges. While for higher income customers, they are likely to have less price elastic demand, and may value time more compared to a modest delivery charge. They can also be less sensitive to private labels as against branded product price differences.

Differentiated delivery charges

The addition of delivery charges would increase the revenue from higher prices to customers but it will also reduce order volume. The best approach is therefore to not to charge more where possible and utilise the differentiated fee pattern for those customers who are willing to pay while maintaining an affordable basic delivery option.

Private label expansion

This particular strategy would be vulnerable to a lower income market because it will reduce the customers grocery basket cost without requiring Shoprite to abandon the online channel. It is therefore important that the private labels should expand choice rather than completely replacing branded alternatives.

Consumer equilibrium

A lower income household allocating a fixed budget must select branded groceries + private label groceries + delivery charges + physical store travel+costs/time.

Recommendation

It is recommended to proceed but perform a Re design to the expansion around affordability and delivery efficiency. Shoprite should perform expansion of Sixty60 into the lower income urban market, and maintain a low cost standard delivery option. The extra charges should be applied only for premium delivery speed and the private labels should be expanded without eliminating important branded choices.

Sasol Energy Transition Investment

The calculation of Net present value for project A shows R222.43 million and for project B, it is R24.32 million. This indicates that project A is comparatively better against project B.

Carbon cost adverse scenario

For project A, there is a fall in the cash flow by 20% from year 3 to 5, and the npv calculation shows R99.74 million. With respect to project B, the fall is 15% for year 1 to 3 which shows a net present value of -R61.16 million.

Accounting, economic, opportunity, sunk and external cost

With respect to Sasol, the accounting cost is R900m/R1150m investment expenditure, while the economic cause is the real resources sacrificed by selecting either project. The sunk cost is the expenditure incurred at the facility while the opportunity cost is choosing project A and thereby ignoring the benefits from Project B. The external cost is the carbon emission as a result of business operation.

Why undiscounted cash flows can mislead

In respect to project B, it has a much larger cash flow profile but the benefit will arrive further into the future. This later cash flow does not compensate for the R250m larger initial investment at a 11% discount rate.

Production possibility Frontier

In respect to plant A, it can move production closer to the existing frontier by reducing interruptions but project B is particularly relevant to the long term technological transformation of the production system.

Short run vs long run

The immediate operating benefits are significantly higher for project A but project B involves a substantial technological change which shows stronger later performance. It is therefore important to consider the marginal returns by Sasol and should invest where the incremental discounted economic benefits exceed the incremental cost and risk.

Carbon cost is strategic cost

The carbon cost exposure is indicated as a strategic economic risk, and not simply an accounting item. It should not be treated merely as regulatory compliance expenses.

Recommendations

On the basis of analysis, it is recommended to select project A because it produces higher base case NPV, positive NPV under specified adverse scenario and and better risk adjusted financial position as compared to project B.

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