Two figures can rise together without one causing the other. Understanding that distinction helps students read business news more carefully. The following fictional example is a general evidence-reading exercise, not advice about a competition portfolio or client case.
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Read the observation before the explanation
A fictional shop spends more on advertising during a holiday month, and its orders also increase. The observation is that spending and orders rose during the same period.
The statement that advertising caused the increase is a stronger claim. Seasonal demand, a price change, new opening hours or several factors together could also explain the result. The observation alone does not isolate advertising's effect.
Look for a common cause
The holiday itself may influence both decisions: managers expect more shoppers and choose to advertise more, while customers buy gifts regardless of that particular advertisement. This creates a possible common cause.
It is also possible that stronger early sales encouraged more advertising later. Before discussing direction, ask when each decision and measurement occurred. A chart without a clear time sequence may hide this distinction.
Ask what comparison would be informative
A more useful investigation might compare similar periods or suitably comparable groups, while examining other differences. Randomised designs can help with causal questions when appropriate, but real studies still need careful implementation and interpretation.
Simply adding more observations does not automatically remove a systematic bias. Sample size, measurement quality and study design answer different questions.
Use wording that matches the evidence
With only the fictional monthly observation, write that higher advertising and higher orders occurred together. Then identify the additional evidence needed before making a causal claim.
When reading an actual source, record its date, definitions and limitations. This article offers public learning context only. Questions about permitted participation and support should be directed to the official competition rules and the school's advisor; no competition-specific research, investment selection or student submission is supplied here.
Continue reading: Wharton Investment Competition: Revenue, Profit and Cash Flow.
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Official information and further reading: Source 1
