This paper evaluates the extent to which the American Customer Satisfaction Index (ACSI) acts as a determining variable of the US consumption function. Results show that the ACSI is a significant self-predictor of personal consumption expenditure, as well as a potent policy variable even when income and wealth are controlled for.
Ramasamy, B., & Yeung, M. (2010). Customer Satisfaction and the Consumption Function. Economics Research International, 2010, 1–5. https://doi.org/10.1155/2010/202014