• ... often analysis seems to be based on the assumption that future economic output is almost entirely determined by inexorable economic forces independently of government policy so that devoting more resources to one use inevitably detracts from availability for another.

    William Vickrey: ... often analysis seems to be based on the assumption that future economic output is almost entirely determined by inexorable economic forces independently of government policy so that devoting more resources to one use inevitably detracts from availability for another.