The increase in the share of the number of older people in the Polish population requires constant diagnosis of the degree of satisfying their needs. One of the ways of such assessment is the dynamic analysis of changes in the goods and services consumption. The author's research task was to...

Objective: The objective of the research was to study consumer decision-making and purchasing preferences when buying engine oils to reveal the presence of consumer preference heterogeneity. Research Design & Methods: Survey data were collected from Polish and Czech consumers by using a...