which to conduct an interview on the topic of marketing.

In the interview find out what life was like for them at your age, specifically regarding marketing:

ask what society was like

their purchase habits, those of their parents/siblings/friends

how were they influenced in terms of purchases and/or brand preferences

ask about the 4 Ps: prices of products; advertising (where did they get information about products); what products were available; places they would shop; purchasing habits; attitudes towards consumption

ask them to compare those experiences to today