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Cambridge Journal of Economics 28:449-456 (2004)
Cambridge Journal of Economics, Vol. 28, No. 3, © Cambridge Political Economy Society 2004; all rights reserved

Notes and Comments

Pure joint production and international trade: a note

Theodore Mariolis*

Address for correspondence: Department of Public Administration, Panteion University, 136 Syngrou Avenue, 17671 Athens, Greece; email: mariolis{at}panteion.gr

This paper applies the principles of the neo-Ricardian (or Sraffian) theory of international trade to certain joint production systems. It is shown that, in contrast with single-product systems, (i) there is not always a pattern of international specialisation, which would entail the increase of the real wage rate in both economies, and (ii) the ‘law of comparative advantage’ has no general validity. Furthermore, not only the existence of such a pattern of specialisation but also the validity of this law depend on the values of the variables of distribution of income. The analysis is wholly based on two of the numerical examples formulated by Bidard in 1997, and further generalised in an elementary way only when this is considered necessary.

Key Words: Joint production • International specialisation • Law of comparative advantage • Neo-Ricardian theory

JEL classifications: D57, E11, F10

Manuscript received March 2, 2001; final version received March 9, 2002.


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