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Fisher, Allan G. B. (George Barnard), 1895-1976 (Nombre personal)
Progreso económico y seguridad social, 1949 (14-2-18)
was a noted New Zealand born economist. Perhaps his most notable contribution was to investigate economic development in terms of the sequential dominance of different sectors of the economy: the primary, secondary and tertiary sectors (three-sector theory).[1][2]