There is, furthermore, a persistent feeling that the life cycle concept adds luster and believability to the insistent claim in certain circles that marketing is close to being some sort of science.
Bodie, Zvi, Robert C. Merton, and William Samuelson. "Labor Supply Flexibility and Portfolio Choice in a Life-Cycle Model." Journal of Economic Dynamics & Control 16, nos. 3-4 (July–October 1992): 427 ...