4 out of every 10 retail sales are influenced by mobile, with stores who have a strong, parallel e-commerce strategy earning top profits. What risks does mobile expose retailers to and how can they be mitigated? With an average of 20 stores closing their doors every 24 hours in the first half of 2012, can m-commerce halt a Christmas catastrophe? Tradedoubler‘s head of market intelligence, Jane Turner, shares research on this and more, including the apps that have shaped consumer behaviour over mobile, in this week’s AppBeat.