Technological development, technological complementarity and structural change

The paper looks at the relation between technological development and structural change. It tries to say whether technological development leads automatically to an increased level of specialization. The reverse side of the coin is also examined: whether industries in which a country specializes show a higher than average rate of technological development. Finally an opinion is formed on the old question of whether such things as 'good' specializations exist. In the second part, two well-known theories of structural change - multi-stage theory of technological accumulation, and evolutionary theory, explaining economic growth in terms of emergence and development of new industries - are complemented by the theory of technological complementarity.