We study three different models in which public goods are supplied by private contributions. In one of these models, tax-financed government subsidies to private contributions will definitely increase the equilibrium supply of public goods. In the other two models, government subsidies are...

The net present value of costs and benefits from a pay-as-you-go social security system are negative for young people and positive for the elderly. If people all vote their financial selfinterest, there will be a pivotal age such that those who are younger favor smaller social security benefits...

Transplants of donated stem cells save the lives of many patients with blood diseases. Donation is somewhat painful, but rarely has lasting adverse effects. Patients can accept transplants only from donors with compatible immune systems. Those lacking a sibling match must seek donations from the...

The question of whether governments spend too much or too little has been a frequent subject of debate, but has been infrequently analyzed.This paper proposes and then applies a methodology which checks to see whether the "Samuelson condition" for the efficient provision of local public...

The net present value of costs and benefits from a pay-as-you-go social security system are negative for young people and positive for the elderly. If people all vote their financial self-interest, there will be a pivotal age such that those who are younger favor smaller social security benefits...

The question of whether governments spend too much or too little has been a frequent subject of debate, but has been infrequently analyzed.This paper proposes and then applies a methodology which checks to see whether the "Samuelson condition" for the efficient provision of local public...