1,721,029 research outputs found
Indagine sperimentale per lo studio dei percorsi scolastici e degli sbocchi professionali dei diplomati delle scuole medie superiori in Toscana
No full textPost stratificazione per sesso e distorsioni della struttura per età e dell'offerta di lavoro
No full textDottor Divago: Discernere, valutare e governare la nuova Università.
No full textCollana Studi e Ricerche AI
Some issues on non-sampling errors in EU-SILC
No full textThe objective of this paper is to carry out a review of the sources of non-sampling errors and lack of comparability in EU-SILC ( EU Statistics on Income and Living Conditions) data across countries and across time, together with an assessment of their impact on income variables and poverty measures.The paper begins with a broad literature review on different frameworks for classifying types of error encountered in surveys. Such frameworks linking error components to theirs sources can be helpful in identifying and controlling those errors from the data production side. From the side of EU-SILC data use and analysis it is helpful to identify and classify patterns of distortion to which particular results are subject. It is from this perspective that we identify a wide range of potentially useful studies in Section 3. We also note how differences in concepts and procedures can affect comparability. We discuss in details the specific aspect concerning the quality and comparability of EU-SILC data related to the presence of large values and outliers in the measured household disposable income. This is only one example of many more in-depth studies on quality and comparability of EU-SILC data that could be usefully carried out for augmenting the comparability of such a fundamental survey for monitoring the social landscape of European Union
Studio pilota sui flussi scolastici e stima dell'offerta di lavoro per titolo di studio e sesso
No full text
Estimating the size of street-dwelling populations using mark-resighting counts
No full textMark-resighting constitutes an advanced technology for estimating animal abundance. Joint hypergeometric maximum likelihood, Minta-Mangel and Bowden estimators are usually adopted with mark-resighting data. In presence of any tendency of animals to aggregate into groups, the Bowden estimator is the sole reliable method, providing that marks are quite evenly distributed among groups. In some cetacean surveys, marking disturbances are avoided through natural marking. Natural marking with Bowden criterion is used to estimate the abundance of street-dwelling populations. The marked individuals are persons identified and recorded in the initial part of the survey and recognizable in subsequent occasions. A simulation helps determine the performance of the Bowden estimator under a wide set of situations, taking into account key features of street-dwelling populations. When marked individuals are evenly distributed among groups, the strategy is efficient
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