The declining use of cash in society urges charities to experiment with digital payment instruments in their off-line fund raising activities. Cash and card payments differ in that the latter do not require individuals to donate at the time of the ask, disconnecting the decision to give from the...

Food production is a primary contributor to climate change with greenhouse gas (GHG) emissions varying widely across food groups. In a randomized experiment, we examine the impact of providing individualized information on the GHG emissions of grocery purchases via a smartphone app, compared to...