The role of private sector in development: The relation between public-private investment in infrastructure and agricultural exports in developing countries

Increasing foreign private investment in developing countries explains why the Public-Private Investment (PPI) is becoming a key tool to reach the development goal. This article analyzes the relation between PPI in infrastructure and agricultural exports in developing countries. We use the panel data approach (52 countries and 17 years). Results show that PPI in infrastructure has a positive impact on agricultural exports of developing countries. The impact is greater in developing countries with higher income rates. This suggests that the lower income countries require the intervention of public sector without which private investment cannot help to economic development.

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Homologous recombination promoted by reverse transcriptase during copying of two distinct RNA templates.

Retroviruses are known to mutate at high rates. An important source of genetic variability is recombination taking place during reverse transcription of internal regions of the two genomic RNAs. We have designed an in vitro model system, involving genetic markers carried on two RNA templates, to allow a search for individual recombination events and to score their frequency of occurrence. We show that Moloney murine leukemia virus reverse transcriptase alone promotes homologous recombination efficiently. While RNA concentration has little effect on recombination frequency, there is a clear correlation between the amount of reverse transcriptase used in the assay and the extent of recombination observed. Under conditions mimicking the in vivo situation, a rate compatible with ex vivo estimates has been obtained.