Optimising the present without mortgaging future demand.
Evidence status
What was reproduced, and what it does not prove.
The CSV and Python verify discounting and illustrative totals. They prove neither a real brand effect nor causality.
- Technical specification of the short–long term trade-off, specification in French (opens in a new tab)
v1, 31 August 2026 · CC BY 4.0 · specification in French · Method document written by marketing-mix.net. The figures are illustrative: they are not market measurements.
Key distinctions
Three conditions before calculating.
Two reconciled accounts
The immediate account includes sales, margin and costs over the period. The future account includes retention, reference price, memory, customer base and capacity. Both use the same economic unit and an explicit discount rate.
Demand debt
Cutting coverage, multiplying promotions or degrading service can improve the quarter by consuming demand created earlier. That consumption is recorded as debt when the leading indicators fall below a threshold.
Gates rather than a fixed ratio
A universal split between brand and activation ignores maturity, season, margin and capacity. Define an immediate floor, a minimum of future investment and review gates adapted to the cycle.
Method
Building a defensible temporal arbitration
- 01Define the horizons
Choose decision window, duration of effect and discount rate; distinguish fast signals, delayed behaviours and assets whose depreciation only becomes visible after several periods.
- 02Value the mechanisms
For each option, compute immediate contribution and then the effect on retention, net price, penetration or future cost; use a distribution, not a single long-term multiplier.
- 03Set the guardrails
Establish a cash floor, a minimum capacity, brand-health thresholds and a maximum exposure; test the scenarios where future value is halved or delayed.
- 04Install lagged reviews
Read the metrics according to their causal delay; a decision taken on weekly sales must not interrupt an action whose first credible effect is quarterly.
The account of the present and of future demand
Four scenarios show their immediate contribution, their discounted future value and the demand debt created.
Activation
Balance
Strong brand
Cut
The most profitable plan this quarter loses €140k over eighteen months
An activation scenario adds €280k of quarterly contribution but reduces coverage and consideration. A balanced scenario adds €190k and maintains €220k of brand investment. The model estimates a future loss of €420k for activation and a gain of €60k for balanced.
At 10% annual discounting over eighteen months, the future loss is worth about €364k and the gain €52k. Total activation value: €280k − €364k = −€84k. Balanced value: €190k + €52k = €242k. Even if the future effect is halved, activation is worth €98k, still below €216k for balanced.
The balanced scenario is retained. A reserve of €40k funds a brand experiment in order to reduce the uncertainty rather than assume a fixed multiplier.
Acceptance conditions
What must be true to act.
- 01
Immediate and future effects use a reconciled economic unit.
- 02
The discount rate, the delays and the intervals are published.
- 03
An immediate floor and a future minimum frame the optimisation.
- 04
Reviews respect the causal delay of each indicator.
Limits
What this analysis does not prove.
- Future brand value remains hard to identify precisely.
- The discount rate does not resolve structural uncertainty.
- Competitive shocks can abruptly change the return on accumulated assets.
References
Works cited.
- Dekimpe, M. G. & Hanssens, D. M. (1995), “The Persistence of Marketing Effects on Sales”, Marketing Science.
- Binet, L. & Field, P. (2013), The Long and the Short of It.
- Srinivasan, S., Vanhuele, M. & Pauwels, K. (2010), “Mind-Set Metrics in Market Response Models”, Journal of Marketing Research.