When there is uncertainty about costs and benefits, any of these mechanisms can be preferable, depending on the shapes of the marginal social cost and marginal benefit curves.

When there is uncertainty about costs and benefits, any of these mechanisms can be preferable, depending on the shapes of the marginal social cost and marginal benefit curves.

当成本和收益不确定时，任何这些机制都可能是完美的，这取决于边际社会成本和边际收益曲线的形式。