The deal is a powerful incentive - for some sectors. A new study by GO Digital showcases the key ways mobile influences the purchase in different sectors including groceries, apparel & shoes and electronics/technology. The study also highlights a concept we'll coin here called "pre-emptive buying" which simply means a majority of consumers are making a shopping list and making up their minds about the products they buy before they enter the store. The question is, how do retailers influence this once they are inside their store...