The document summarizes research on developing effective customer-centric loyalty programs. It found that there is no "one-size-fits-all" approach and identified three distinct customer segments with different preferences for loyalty program elements. By tailoring programs to unique customer preferences based on characteristics like age, income, and shopping behaviors, retailers can increase customer retention, differentiation, and profits. The research provides guidelines for retailers to consciously design loyalty programs that meet the needs of existing and new customer segments.