“…Since its original formulation, Little's “Sales Response to Advertising Functions” has become increasingly more powerful and more sophisticated. Now referred to as response functions, the key drivers are: - Availability of more accurate and complete data on sales (e.g., scanner data at checkout provided by firms like IRI and Nielsen) and tracking of activities (e.g., digital promotions).
- Vastly improved computing power.
- Individual promotional elements of total sales and marketing expenditures extended to include more than one element (e.g., print, TV, digital, sales force).
- The individual sales and marketing elements extended to include econometric ones (e.g., weather/environment, economic, industry trends, and competition).
- Qualitatively developed response functions now largely replaced by quantitatively developed ones (Dekimpe, Franses, Hanssens, & Naik, ; Hanssens, Parsons, & Schultz, ).
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