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Market structure and foreign trade : increasing returns, imperfect competition, and the international economy / Elhanan Helpman, Paul R. Krugman Monografia Publication Brighton : Harvester Press, cop. 1985 Description IX, 271 p. : il. ; 24 cm LocationBiblioteca Geral da Universidade do Minho Availability Available (1).

Trade policy and market stucture / Elhanan Helpman, Paul R. Krugman Monografia Publication Cambridge, Mas. : The MIT Press, imp. 1991 Description XII, 191 p. : il. gráficos ; 24 cm LocationBiblioteca Geral da Universidade do Minho Availability Available (1).

Trade policy and market structure / Elhanan Helpman, Paul R. Krugman Monografia Publication Cambridge, Mass. : The MIT Press, cop. 1989 Description XII, 191 p. : il. gráficos ; 23 cm LocationBiblioteca Geral da Universidade do Minho Availability Available (2).

Market structure and foreign trade : increasing returns, imperfect competition, and the international economy / Elhnan Helpman, Paul R. Krugman Monografia Publication Cambridge, Mas. : The MIT Press, 1996 Description IX, 271 p. : il. gráficos ; 23 cm LocationBiblioteca Geral da Universidade do Minho Availability Available (1).