The Evaluation of National Income in an Imperfect Economy

James A. Mirrlees


In this paper, I shall discuss how national income should be
measured in an 'imperfect' economy, where feasible policy instruments
such as taxes, tariffs, quotas, and quantitative controls do not operate
in a lumpsum manner, and may be far from their optimum level. In
particular, I want to examine the meaning of national income, and its
parts, when they are measured in terms of 'world prices'; or, more
precisely and more generally, in terms of the accounting prices that
might be computed as a guide to particular production decisions, in the
public sector and elsewhere. I have found this set of questions
confusing, and it may be that others do too, and will welcome an attempt
at clarification.

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