As for my curiosity, I have two questions:

1) Is there research concerning customers preferences for buying perishable products? For example, where can I find conclusions like 'more people buy some certain fruit/vegetable of age 3 days than ages 1 day and 2 days because it tastes better when it is soft etc.?'

2) Is there a possibility to find a set of data including the demand for products with its age (e.g fruits, dairy etc.)?

Thank you for help in advance.