Haberler’s three Cairo lectures ask whether foreign trade aids the development of poorer economies. Written against postwar arguments for import substitution, the Singer-Prebisch thesis, Myrdal’s “backwash” view, and dependency-style claims about center and periphery, the work defends a liberal theory of trade while allowing narrowly bounded exceptions.
For the purposes of our discussion I shall conform to the general usage and define development as the growth of per capita real income.
This definition lets Haberler focus on whether trade raises output per head, but he refuses to equate development with industrialization. Agricultural specialization is not by itself backwardness; what matters is productivity, capital equipment, skills, and institutions. On this basis he presents comparative advantage not as a static apology for existing patterns, but as a channel through which poorer countries can enlarge their productive powers.
The general conclusion, then, is that international trade, in addition to the static gains resulting from the division of labor with given (or autonomously changing) production functions, powerfully contributes, in the four ways indicated, to the development of the productive capabilities of the less developed countries.
Those dynamic gains include access to capital goods and raw materials, the spread of technical knowledge and managerial practice, foreign investment, and the competitive pressure that disciplines domestic production. Haberler therefore treats trade as a mechanism of learning and capability formation, not merely as exchange at given costs.
The second lecture clarifies what classical trade theory does and does not claim. Haberler denies that free trade guarantees income convergence or removes all international inequality. Divergent population growth, innovation, institutions, and initial conditions may allow rich countries to pull ahead even while poor countries gain from trade. The relevant proposition is more modest but, in his view, more defensible.
To repeat—what classical theory really teaches is that trade will benefit every country, rich and poor, but not that mere trade will necessarily remove or even reduce international inequality.
This distinction frames his critique of the Singer-Prebisch argument that primary exporters face a secular deterioration in their terms of trade. Haberler challenges both the evidence and the inference: British price series cannot represent the whole industrial world; freight costs and quality changes complicate long-run comparisons; and a fall in export prices caused by rising productivity is not necessarily a welfare loss. He regards broad protectionist programs based on such extrapolations as economically hazardous.
The third lecture addresses disguised unemployment and the claim that poor countries possess surplus labor that can be moved into protected industry at little cost. Haberler’s answer is that unemployment in poor economies often reflects low productivity, weak training, imperfect mobility, and missing capital rather than an unused free resource. If protection pulls labor and capital away from export industries, both exports and the capacity to import needed goods may fall.
The underdeveloped countries are not exempt from the general law of scarcity—they least of all, unfortunately.
His treatment of Myrdal is similarly qualified. Growth in rich countries can injure particular producers, but it also expands markets, transmits science and medicine, and supplies capital and equipment. Haberler’s presumption is that development in the center more often creates opportunities for the periphery than blocks them, though the benefits are neither automatic nor evenly distributed.
The final policy position is liberal but not absolutist. Haberler accepts that infant industries, learning effects, and external economies may sometimes justify temporary intervention, yet he insists that protection is an investment with costs: higher prices, lower consumption, misallocated capital, and political capture. Its burden is especially serious where capital is scarce.
I believe that sometimes well chosen methods of moderate protection of particular industries can help to speed up economic development.
The practical lesson is therefore restraint. Haberler prefers general, transparent, market-compatible measures over exchange controls, elaborate planning, and administrative selection of favored sectors. Education, health, infrastructure, mobility, and institutional reform matter more than trade restriction. The lectures’ enduring significance lies in this disciplined middle position: trade is normally a dynamic engine of development, while protection is defensible only as a limited, temporary, and carefully costed attempt to build genuine productive capacity.
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