The econometric approach to the construction of production, cost and o
ther frontiers, and the measurement of efficiency relative to these fr
ontiers, historically has had a strong policy orientation. This distin
guishes the approach from the mathematical programming approach, which
has had a managerial decision-making orientation geared to solving al
location problems within the public or private organization. In this p
aper I review the development of the econometric approach to efficienc
y analysis. I then discuss a small number of empirical studies chosen
to illustrate the application of the econometric approach to a collect
ion of public policy issues for which the notion of efficiency measure
ment is of prime importance. Examples are drawn from the areas of (1)
agricultural productivity, (2) labor market efficiency and equity, (3)
the measurement of the standard of living, (4) the establishment of q
uality of service standards, and (5) the valuation of environmental di
samenities.