NEM COMPUTER CHIPS, NEM POTATO CHIPS: PRODUTIVIDADE E MUDANÇA ESTRUTURAL NA INDÚSTRIA BRASILEIRA, 1970-2001

This paper aims to assess the contribution of structural changes in the Brazilian industry to productivity growth, during the 1970-2001 period. Using data from the Industrial Census of 1970, 1980 and 1985 and from the Industrial Annual Survey of 1996 and 2001, the paper concludes that: (i) though liberalizing reforms had a strong impact on productivity in the first five years after their implementation, the trend does not seem to be maintained in following periods; (ii) there is no clear evidence of a positive influence of the structural bonus; and (iii) job creation seems to be concentrated in slow productivity growth sectors.

Recommender System with Explanations

O propósito desta dissertação é implementar um Sistema de Recomendação de estabelecimentos de comércio a utilizadores específicos, com capacidade de explicar os resultados obtidos

Inter-firm technological cooperation: effects of absorptive capacity, firm-size and specialization

This paper aims to add evidence on the role played by firms’ technological competencies in the determination of their intensity of cooperation with other firms. Using a database composed by patents jointly filed by two or more firms in the European Patent Office, the paper confronts the hypotheses of complementary or substitutive character of technological cooperation in relation to intra-mural R&D. The results suggest that more technologically and productive specialized firms are more likely to cooperate and find no support for the hypothesis that greater level of R&D expenditure will induce greater reliance on technological cooperation. It is also suggested that firms cooperate with partners that hold comple- mentary competencies.Indisponível

Sol-gel technology for ecological dyeing cellulosic of fibres

Dyeing cellulosic fibres with reactive dyes wastes great quantities of salt and water. The objective of this work is to dye cellulosic fibers using coloured nanoparticles (CNPs) as an alternative to dyeing with reactive dyes, without salt and with only a short washing-off procedure at the end of dyeing. Samples of cotton were dyed by exhaustion with CNPs at light to medium colours. Washfastness results are given. Complete Washing-off sequence after dyeing was not necessary for the red and yellow colours, only one rinsing. The blue colour needs some washing off since the fastness is lower than for the other colours even though soaping is not necessary, saving energy and time relative to dyeing with reactive dyes