I have been given a dataset with 750 participants, with information on Age, Location, Gender and the year it was obtained (predictor variables although responses may vary by location so this is a random effect).
For each individual, a number of 0/1 responses were recorded based on items they had purchased in the last 5 years.
I am aiming to assess whether purchases vary by year, gender and age.
My question is: would this be a binomial glmer and how would i go about coding the 0/1 part? And if so, would i have to test each item individually?
Some example items are car, television, and more location specific items such as pool cleaner.