Which mathematical concept led to the development of the 'Golden Ratio Pricing Strategy' that many premium retailers use to create perceived value in tiered product offerings?

In today's data-driven retail environment, mathematical modeling plays a crucial role in product strategy and customer analytics. Many retail giants employ sophisticated mathematical concepts to optimize their product positioning and promotional strategies. This poll tests your knowledge of how a famous mathematical concept revolutionized a specific area of retail product management.

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The Fibonacci Sequence (where each tier is approximately 1.618 times the price of the lower tier)
Benford's Law (pricing that follows the natural distribution of first digits)
Bayesian Probability (prices based on conditional probability of purchase)
Nash Equilibrium (prices that create optimal competitive balance)