You can measure changes in consumer behavior through longitudinal research. This type of research helps you track the evolution over time of a marketing phenomenon. It is necessary to build a fixed sample (panel), on which to perform repeated measurements at certain intervals. Finally, you can compare the results obtained in the study of consumer behavior (the evolution of results from one period to another) with the social, technological, economic changes recorded in society.
Changes in consumer behavior can be determined through longitudinal studies. For this, different techniques and tools can be used, from a qualitative to a quantitative approach.