Solitude is an essential quality of wilderness.

The consequences for human welfare involved in questions like these are simply staggering: once one starts to think about them, it is hard to think about anything else.

The consequences for human welfare involved in questions about human capital spillovers are simply staggering. Once one starts to think about them, it's hard to think of anything else

Most trails can be fairly simple.

The potential gains from improved stabilization policies are on the order of hundredths of a percent of consumption, perhaps two orders of magnitude smaller than the potential benefits of available supply-side fiscal reforms.

Solitude is an essential quality of wilderness.