academic article

• Impact of a Rewards-Based Incentive Program on Promoting Fruit and Vegetable Purchases..  American journal of public health.  105:166-172. 2015
• Buying food on sale: a mixed methods study with shoppers at an urban supermarket, Philadelphia, Pennsylvania, 2010-2012..  Preventing chronic disease.  -. 2014
• Using rewards-based incentives to increase purchase of fruit and vegetables in lower-income households: Design and start-up of a randomized trial 2013