From Economic Theory to Policy. By E. Ronald Walker. Chicago: The University of Chicago Press, 1943. Pp. vii, 273. $3.00.

Joseph A. Schumpeter on From Economic Theory to Policy (1945)

Schumpeter’s journal book review assesses E. Ronald Walker’s 1943 study through two distinct problems: the distance between economic analysis and concrete fact, and the economist’s authority to judge policy objectives. He praises Walker’s combination of theoretical competence and governmental experience. Where critics merely identify theory’s deficiencies or dismiss value judgments on epistemological grounds, Walker offers practical remedies and treats policy advice as a problem requiring more than categorical acceptance or refusal.

His account follows these two problems, but its central methodological intervention concerns what “economic theory” includes. Discussing Chapters I and III–IX, with particular praise for the positive suggestions in VI and IX, he insists:

The term "economic theory" covers analytic endeavors of very different methodological nature which should be carefully distinguished.

The decisive distinction is between logical schemata, exemplified by the marginal condition for maximizing a firm’s gain, and statistical generalizations, exemplified by the association between prices and interest rates. Statistical theory confronts a gap between prediction and observation comparable in kind, though greater in extent, to that in physics; additional variables, including stochastic ones, can help bridge it. Logical theory has a different purpose:

In the first case, that of the logical schema, we have a gulf of a different nature: a proposition that simply states a logical implication can never be expected to fit reality. It is not meant to do so. The service it is intended to render for our grasp of reality is to clear up certain points of logic.

Schumpeter thus resists treating empirical mismatch as a uniform indictment of economic reasoning. Applying a logical schema to reality poses a problem different from improving a statistical generalization, and he acknowledges that the former is harder to define.

Turning to value judgments and objectives in Chapters X–XII, Schumpeter reconstructs Walker’s position as three claims: ultimate ends depend on attitudes beyond scientific proof; economists should not use academic authority to cloak political advocacy; and professional expertise nevertheless warrants causal advice about policies serving given or accepted ends. Schumpeter regards this third function as sufficient to justify rigorous economic inquiry:

If economists should succeed in giving a reliable answer to such questions as, for instance, how a tax on profits affects employment, would this not justify all the work bestowed on refinement of either theoretical or statistical tools?

This defense of conditional policy advice also marks his reservation about Walker’s tentative claim to a wider authority. He thinks Walker’s fairness weakens that claim. The closing assessment makes the tension especially sharp: Chapter XII provides a useful introduction to welfare economics, yet its criticism of the revival of eighteenth-century Italian doctrines of public happiness is, Schumpeter argues, more destructive than Walker recognizes. The review’s significance lies in its paired limits: economic theory should be judged according to its methodological function, and economists’ policy authority should rest on causal competence rather than a scientific mandate to choose society’s ultimate ends.