Ajuda externa e crescimento económico: o Millennium challenge account em Cabo Verde

A discussão sobre a questão da efectividade da ajuda externa já dura há décadas. Se por um lado estão estudos que consideram que a ajuda externa tem um impacto positivo no crescimento económico, por outro estão aqueles que concluíram que os fluxos de ajuda apenas contribuem para aumentar a corrupção, a pobreza e perpetuar maus governos. Este trabalho de investigação discute a questão da efectividade das ajudas externas no caso concreto de Cabo Verde. O país passou recentemente a beneficiar de um novo programa de ajudas externas, o Millennium Challenge Account, pelo que é pertinente perceber se os fluxos de ajudas externas, em geral, e do programa MCA, em particular, têm dado resultados positivos para o país. Para a análise empírica, foram analisados os relatórios anuais do Banco de Cabo Verde e outras fontes complementares, e os dados usados são referentes a 23 anos. A conclusão da análise econométrica sugere que a ajuda externa se tem repercutido de forma positiva no crescimento económico de Cabo Verde, apesar da variável Assistência Oficial ao Desenvolvimento não ter apresentado significância estatística. Os fluxos privados são contudo fortemente positivos e significativos. O impacto do programa MCA também se revelou positivo para o crescimento económico do país, reforçando a ideia de que quando a ajuda é direccionada para sectores que dinamizam o crescimento da economia, o seu impacto no mesmo é positivo. ABSTRACT; The debate about the question of foreign aid effectiveness goes back decades. While on one side, there are researchers that conclude that foreign aid have a positive impact on economic growth, on the other side, there are those who conclude that the flows of aid only contribute to promote corruption, poverty and perpetuate bad governments. This work investigates the question of foreign aid effectiveness in the economic growth rates of Cape Verde. Since Cape Verde became recently a beneficiary of the new program of foreign aid, the Millennium Challenge Account, it would be interesting to understand if the flows of foreign aid and the MCA have given positive results in the case of Cape Verde. To reach these goals, the annual reports of the Central Bank of Cape Verde, together with other sources, have been analysed and the data refers to 23 years. The results of the econometric analyses suggest that foreign aid has had a positive impact on economic growth in Cape Verde. Even though the Official Development Assistance did not present statistically significant coefficient, the Private Flows seem to be largely positive and significant. The impact of the MCA program also revealed a positive impact on the economic growth of the Cape Verdean's islands, and it reinforces the idea that when the flow of aid is directed at those sectors that promote economic growth, its impact on the economy is largely positive and significant.

Development of molecular approaches to assess the diversity and abundance of marine nematodes assemblages for assessment of Good Environmental Status of the estuarine and marine ecosystems

In Europe, the concerns with the status of marine ecosystems have increased, and the Marine Directive has as main goal the achievement of Good Environmental Status (GES) of EU marine waters by 2020. Molecular tools are seen as promising and emerging approaches to improve ecosystem monitoring, and have led ecology into a new era, representing perhaps the most source of innovation in marine monitoring techniques. Benthic nematodes are considered ideal organisms to be used as biological indicator of natural and anthropogenic disturbances in aquatic ecosystems underpinning monitoring programmes on the ecological quality of marine ecosystems, very useful to assess the GES of the marine environment. dT-RFLP (directed Terminal-Restriction Fragment Length Polymorphism) allows to assess the diversity of nematode communities, but also allows studying the functioning of the ecosystem, and combined with relative real-time PCR (qPCR), provides a high-throughput semi-quantitative characterization of nematode communities. These characteristics make the two molecular tools good descriptors for the good environmental status assessment. The main aim of this study is to develop and optimize the dT-RFLP and qPCR in Mira estuary (SW coast, Portugal). A molecular phylogenetic analysis of marine and estuarine nematodes is being performed combining morphological and molecular analysis to evaluate the diversity of free-living marine nematodes in Mira estuary. After morphological identification, barcoding of 18S rDNA and COI genes are being determined for each nematode species morphologically identified. So far we generated 40 new sequences belonging to 32 different genus and 17 families, and the study has shown a good degree of concordance between traditional morphology-based identification and DNA sequences. These results will improve the assessment of marine nematode diversity and contribute to a more robust nematode taxonomy. The DNA sequences are being used to develop the dT-RFLP with the ability to easily process large sample numbers (hundreds and thousands), rather than typical of classical taxonomic or low throughput molecular analyses. A preliminary study showed that the digest enzymes used in dT-RFLP for terrestrial assemblages separated poorly the marine nematodes at taxonomic level for functional group analysis. A new digest combination was designed using the software tool DRAT (Directed Terminal Restriction Analysis Tool) to distinguished marine nematode taxa. Several solutions were provided by DRAT and tested empirically to select the solution that cuts most efficiently. A combination of three enzymes and a single digest showed to be the best solution to separate the different clusters. Parallel to this, another tool is being developed to estimate the population size (qPCR). An improvement in qPCR estimation of gene copy number using an artificial reference is being performed for marine nematodes communities to quantify the abundance. Once developed, it is proposed to validate both methodologies by determining the spatial and temporal variability of benthic nematodes assemblages across different environments. The application of these high-throughput molecular approaches for benthic nematodes will improve sample throughput and their implementation more efficient and faster as indicator of ecological status of marine ecosystems.