I’ll have the ice cream soon and the vegetables later: A study of online grocery purchases and order lead time

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Using Behavioral Economics to Design More Effective Food Policies to Address Obesity (2014, background): “In one study, researchers analyzed purchases from an online grocery store and found that as the time delay between order and delivery decreased, customers ordered a lower percentage of healthy items and a higher percentage of unhealthy items (Milkman et al. 2010).”
Unsure what the future will bring? You may overindulge: Uncertainty increases the appeal of wants over shoulds (2012, unknown): “attention and monitoring (Matthews, Scheier, Bunson and Carducci, 1989; Muraven and Baumeister, 2000). Muraven and Baumeister (2000) argue that coping with such unpredictable stimuli “seems to involve processes that demand inhibition, such as blocking sensations, overriding thoughts, and stopping em”
Clicks as a Healthy Alternative to Bricks: How Online Grocery Shopping Reduces Vice Purchases (2017, background): “Because vices generally serve immediate gratification motives, this difference might be pertinent in Study 1 (Milkman, Rogers, and Bazerman 2010).”