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UniCA Eprints
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1333 Publications
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  • Effetti della siccità sull'abbondanza e distribuzione dei macroinvertebrati

    The role of disturbance on structuring animal communities is a central subject in the ecological research. In particular in the intermittent systems river, the drought event seems to determine the macroinvertebrate community structure. In such context, we analysed the macrobenthos of a Sardinia intermittent stream (Rio Pula, Cagliari). The study was carried out on 16 sites in 3 years (from 2000 to 2002) with seasonal samplings (spring and autumn) of the macroinvertebrate community. The result...

    Essays on the composition of government spending and economic growth

    The link between fiscal policy and economic growth has raised a great deal of debate at both theoretical and empirical level. Public expenditure and national income have been the focus of public finance, since the amount of public expenditure has been increasing over time in almost all countries in the world. The aim of this study is to empirically examine the effects of different types of government expenditures on economic growth, with particular attention to the Italian case. The first ...

    Il pensiero algebrico:questioni di natura epistemologica e didattica

    The subject of this thesis is the study of the birth of algebraic thinking, as a generalization process, in 10 to 14 years old pupils. We analyse the relationships between the ways of describing a general algorithm, the strategies applied in solving arithmetical-algebraic problems and verbal and symbolic languages. As a result of the study, we can confirm that the causes of some difficulties in learning elementary algebra are due to a didactic obstacle rather than to an ontogen...

    Three Essays on the generalizability of experimental results in economics

    Although few economists today dismiss the use of the laboratory experiments, it would be a mistake to think that experimental methodology no longer represents a controversial issue in economics. One of the major criticisms is represented by the external validity of experimental data and concerns the transferability of results obtained in laboratory to the real world. The aim of this thesis is to tackle the issue of external validity focusing in particular on one aspect: the possible lack of r...
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