Search results for "Metrics"
showing 10 items of 5055 documents
Effiziente Kapitalallokation in der Banksteuerung
2007
Das Risiko-Rendite-Paradoxon: Keine statistische Illusion, sondern ein empirischer Befund!
1999
Climate variability and agriculture in Italy: a stochastic frontier analysis at the regional level
2020
In the next future, climate change effects will represent a challenge for Europe and the Mediterranean area. These will have to cope with a rapid increase in climate variability. Although many economic sectors may be affected, agriculture is the most susceptible as climate heavily affects crop production trends, yield variability and the availability of areas suitable for cultivation. Using the stochastic frontier approach, the aim of this work is to analyse the impacts of climate variability on Italian regional technical efficiency in the agricultural sector for a period spanning from 2000 to 2009. Considering that technical inefficiency could be influenced by two main annual meteorologica…
Triggering collective action for bio-energy supply chain through contract schemes
2016
This paper discusses contractual features to manage and coordinate a hypothetical bio-energy supply chain. The present study focuses on farmers operating in two Regions of Italy, namely Sicily and Campania, somewhat representative of areas with high potential of investments in new bioenergy supply value chain. Farmers were asked to choose whether to participate or not in a collective investment regulated by contract schemes. Monetary trade-offs were then computed among contract attributes. A specific questionnaire was submitted to a sample of farmers selected on the basis of their potential capability of investments. A stated preference modelling approach was implemented so that farmers cou…
On the Estimation of the Volatility-Growth Link
2012
It is common practice to estimate the volatility-growth link by specifying a standard growth equation such that the variance of the error term appears as an explanatory variable in this growth equation. The variance in turn is modeled by a second equation. Hardly any of existing applications of this framework includes exogenous controls in this second variance equation. Our theoretical findings suggest that the absence of relevant explanatory variables in the variance equation leads to a biased and inconsistent estimate of the volatility-growth link. Our simulations show that this effect is large. Once the appropriate controls are included in the variance equation consistency is restored. I…
Análisis de las métricas alternativas de Archivos de Bronconeumología durante el periodo 2014-2018
2020
Introduction: Alternative metrics or altmetrics are non-traditional measurements of scientific production that reflect a publication's influence in social networks and similar channels of dissemination. The aim of this study was to analyze the media impact of ARCHIVOS DE BRONCONEUMOLOGÍA according to 2 altmetric aggregators and website visits. Methods: This was an observational study of the original articles and review and consensus articles published in ARCHIVOS DE BRONCONEUMOLOGÍA during the period 2014-2018. Data from the PlumX Metrics and Altmetric aggregators and visits to the ARCHIVOS DE BRONCONEUMOLOGÍA website were analyzed. Five comparisons were made: by specialty area, by funding …
Understanding trends and drivers of urban poverty in American cities
2022
Urban poverty arises from the uneven distribution of poor populations across neighborhoods of a city. We study the trend and drivers of urban poverty across American cities over the last 40 years. To do so, we resort to a family of urban poverty indices that account for features of incidence, distribution, and segregation of poverty across census tracts. Compared to the universally-adopted concentrated poverty index, these measures have a solid normative background. We use tract-level data to assess the extent to which demographics, housing, education, employment, and income distribution affect levels and changes in urban poverty. A decomposition study allows to single out the effect of cha…
Medición del desarrollo humano: un índice alternativo al IDH-2010. Especial referencia a los países latinoamericanos
2014
ResumenEn este trabajo se presenta un índice alternativo al índice de Desarrollo Humano (idh). Utiliza la misma información estadística que éste. A partir de él se obtiene un ranking alternativo de países atendiendo a su desarrollo humano. El nuevo índice no se basa en los valores de los indicadores que lo alimentan, sino en la posición que cada uno de ellos tiene con relación al conjunto de los demás. Posteriormente, clasifica cada indicador en el cuartil correspondiente. El diseño del nuevo índice penaliza la pertenencia de los indicadores a los cuartiles de menor desarrollo. En la aplicación se incide, especialmente, en la situación de los países latinoamericanos.
Contribución de Anales de Pediatría a la visibilidad internacional de la investigación pediátrica española en la Web of Science (2010-2014)
2016
Resumen: Objetivo: Describir el papel de Anales de Pediatría en la difusión de la investigación pediátrica española e identificar las revistas con las que compite internacionalmente. Material y método: Se identificó la producción pediátrica española y la de Anales de Pediatría recogida en la categoría Pediatrics del Science Citation Index de la WoS (2010-2014) analizando su volumen y tipo documental. De los artículos originales y revisiones (artículos) se estudiaron el año, la citación y el tipo de revista de publicación (revistas generales y especializadas). De las generales, se analizó su productividad de acuerdo con su idioma, posición que ocupa en los JCR de 2012 y accesibilidad a sus c…
Statistical methods for the comparison of measurements derived from orthodontic imaging
2000
Biometric comparison procedures for dental imaging methods with continuous outcome were reviewed, mainly concentrating on assessment and comparison of accuracy and precision according to the study design. Univariate graphical and numerical representations of corresponding deviations were summarized to derive a 'check list' of minimum information necessary to compare the measurement methods. The methods reviewed in this investigation are illustrated by the comparison of conventional (radiographic) cephalometry versus assessment using the DigiGraph in 50 female children. A paired t-test and the corresponding confidence interval approach were used to assess deviations in location of two imagin…