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Fonte: Kivetz, R., Urminsky, O., & Zheng, Y. (2006). The Goal-Gradient Hypothesis Resurrected: Purchase Acceleration, Illusionary Goal Progress, and Customer Retention. Journal of Marketing Research, 43, 39–58. Link
Fonte: Starbucks Loyalty Program Case Study — wployalty.net | LoyaltyLion — Starbucks Rewards
Fonte: Dan Ariely — TED Talk "How to Change Your Behavior for the Better". ted.com | Livro: Payoff: The Hidden Logic That Shapes Our Motivations
Fonte: Kelly, Presslee & Webb (2017). Incentive Research Foundation — Award Program Value & Evidence | Condly, Clark & Stolovitch (2003), meta-análise citada pela IRF.
Fonte: Incentive Research Foundation — ROI Case Study: Incentive Success for Key Distributors