Commitment devices are often proposed as solutions to self-control problems, but little attention has been given to the possibility of excess demand for commitment. We provide evidence for overcommitment in a laboratory experiment. Subjects face a tedious productivity task and a tempting option...

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...