198 research outputs found

    A Phoenix in Flames? Portfolio Choice and Violence in Civil War in Rural Burundi

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    This paper challenges the idea that farmers revert to subsistence farming when confronted with violence from civil war. Macro-economic evidence on economic legacies of civil war suggests that civil wars, while obviously disastrous in the short run, do not need to have persistent effects on long term economic outcomes. New micro-level studies are ambiguous about the impact of civil war for welfare. Several studies find long lasting negative effects, particularly through reduced human capital formation while others for example report increased participation in collective action programs and the emergence of local institutions. We investigate to what extend individual incentives for investments are affected by civil war. Using several rounds of (panel) data at the farm and community level, we find that farmers in Burundi who are confronted with civil war violence in their home communities increase export and cash crop growing activities, invest more in public goods, and reveal higher levels of subjective welfare evaluations. We interpret this in the light of similar recent micro-level evidence that points to post-traumatic growth effects after (civil) war fare. Our results are confirmed across specifications as well as in robustness analyses

    A randomised proof-of-concept trial on the effectiveness of a game-based training of phoneme-grapheme correspondences in pre-readers

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    Background: Learning which letters correspond to which speech sounds is fundamental for learning to read. Based on previous experimental studies, we developed a serious game aiming to boost letter-speech sound (L-SS) correspondences in a motivational game environment. Objectives: The goal of this study was to determine the efficacy of this game in training L-SS correspondences in pre-readers. Additionally, an extended version of the game was developed given the importance of handwriting in audio-visual integration. We established whether including a motoric component in the game boosted the letter-speech sound training on top of the effect of the game without the motoric component. Methods: One-hundred forty-five kindergartners were randomly allocated to play either the standard audio-visual version of the game, the motoric version or a control math game. All children were pre- and post-tested on L-SS knowledge and reading accuracy. Results and conclusions: We found that playing the game enhanced pre-readers' L-SS knowledge, but not reading accuracy, after a short, intensive intervention period of 3 weeks. However, children who played the motoric version of the game did not differ significantly from either the standard or the control condition. Implications: This game was efficient in training L-SS correspondences in pre-readers. These results suggest that this game might be useful as a preventive evidence-based intervention for at-risk children in kindergarten who might benefit from a head start before learning how to read. Future studies are needed to examine whether a longer intervention period results in L-SS knowledge being translated into reading skills.</p

    Violent conflict and behavior:A field experiment in Burundi

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    We use a series of field experiments in rural Burundi to examine the impact of exposure to conflict on social, risk, and time preferences. We find that conflict affects behavior: individuals exposed to violence display more altruistic behavior towards their neighbors, are more risk-seeking, and have higher discount rates. Large adverse shocks can thus alter savings and investments decisions, and potentially have long-run consequences—even if the shocks themselves are temporary

    World checklist of hornworts and liverworts

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    A working checklist of accepted taxa worldwide is vital in achieving the goal of developing an online flora of all known plants by 2020 as part of the Global Strategy for Plant Conservation. We here present the first-ever worldwide checklist for liverworts (Marchantiophyta) and hornworts (Anthocerotophyta) that includes 7486 species in 398 genera representing 92 families from the two phyla. The checklist has far reaching implications and applications, including providing a valuable tool for taxonomists and systematists, analyzing phytogeographic and diversity patterns, aiding in the assessment of floristic and taxonomic knowledge, and identifying geographical gaps in our understanding of the global liverwort and hornwort flora. The checklist is derived from a working data set centralizing nomenclature, taxonomy and geography on a global scale. Prior to this effort a lack of centralization has been a major impediment for the study and analysis of species richness, conservation and systematic research at both regional and global scales. The success of this checklist, initiated in 2008, has been underpinned by its community approach involving taxonomic specialists working towards a consensus on taxonomy, nomenclature and distribution

    Briófitas da caatinga 1: Estação Experimental do IPA, Caruaru - PE

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    Foi realizado o levantamento da brioflora de uma caatinga arbórea pertencente a Estação Experimental da Empresa Pernambucana de Pesquisas Agropecuárias (IPA), situada no município de Caruaru (8º08'00"-8º10'00"S, 36º02'00"-36º 10'00"W), Pernambuco. A área estudada compreende 20ha, tem altitude aproximada de 550m e médias anuais de precipitação e temperatura de 671 mm e 23ºC, respectivamente. As coletas foram realizadas durante as estações de estiagem (out-nov/1990) e chuvosa (mai-jun/1991), tendo sido investigados os seguintes substratos: solo, rocha, caules vivos e em decomposição. Registraram-se 16 espécies de briófitas, sendo 14 Bryopsida e 2 Hepaticopsida. Bryaceae e Fissidentaceae foram as famílias de maior representatividade específica na área. A maioria das coletas indicou a predominância de espécies terrícolas e saxícolas, seguindo-se as corticícolas e as epíxilas. O trabalho contém informações sobre distribuição geográfica e aspectos ecológicos das espécies.A floristic survey of bryophyte was carried out in a experimental station at the Empresa Pernambucana de Pesquisa Agropecuária at Caruaru (Lat. 8º08'00"-8º10'00"S; Long. 36º02'00"-36º10,00"W), Pernambuco State. This area has 20ha, an altitude of 550m, an annual rainfall average of 671mm and 23ºC of temperature. The bryophytes were collected during the dry season (oct-nov/1990) and the rain season (may-jui/1991), on the following substrata: soil, rocks, living and dead trunks. There were identified 16 species, 14 Bryopsida and 2 Hepaticopsida. Bryaceae and Fissidentaceae were the most rich families in number of species. In the studied area, the terricolous species were predominant followed by saxicolous, corticolous and the species of decaying wood. Geographical distribution and ecological informations about the species were included
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