This paper explores the possibility that demand for costly commitment may prove unnecessary and thus excessive. In an online experiment, subjects face a tedious productivity task where tempting YouTube videos invite procrastination. Subjects can pay for a commitment device that removes the...

We conduct separate randomized controlled trials of norm-based feedback nudges on house-hold waste in two municipalities in western Sweden. Our main treatment presents recipients with accurate, household-specific feedback highly similar to the standard Home Energy Report design, but with...

We report experimental evidence on the voluntary provision of public goods under threshold uncertainty. By explicitly comparing two prominent technologies, summation and weakest link, we show that uncertainty is particularly detrimental to threshold attainment under weakest link, where low...