Search results for " logit"
showing 10 items of 63 documents
L'effetto di Montalbano sui flussi turistici nei luoghi letterari e televisivi
2015
Da alcuni anni vari enti regionali erogano a fondo perduto a favore di produzioni cinematografiche o televisive nei loro territori, talvolta attraverso le c.d. Film Commission. Di solito cio viene giustificato dall’impatto occupazionale delle riprese e da quello indotto sul cine-turismo. Obiettivo di questo saggio e misurare l’impatto dei telefilm sui flussi turistici delle localita dove essi sono stati girati, al fine di valutare se tali erogazioni a fondo perduto siano opportune; cio attraverso un’indagine empirica (nel periodo 1982-2013) sull’incremento turistico indotto dalle serie TV con il commissario Montalbano. Confrontando gli arrivi nella provincia di Ragusa, sede delle riprese te…
Design and analysis of discrete choice experiments for models with response time
2013
What keeps young adults in permanent poverty? A comparative analysis using ECHP
2009
Abstract Previous studies suggest that there are strong differences in the rates of youth poverty across European countries. Rather surprisingly, it is found to be high in Scandinavian countries, and relatively speaking, lower in Mediterranean and Anglo-Saxon countries. This somewhat unexpected finding prompts the question whether the incidence of poverty is an appropriate measure of youth disadvantage. Instead of considering poverty rates we consider the length of recorded poverty spells, taking into account explicitly the temporal sequencing of the episodes of poverty. Using the European Community Household Panel, individuals are classified into different groups of poverty permanence, eac…
Bayesian joint ordinal and survival modeling for breast cancer risk assessment
2016
We propose a joint model to analyze the structure and intensity of the association between longitudinal measurements of an ordinal marker and time to a relevant event. The longitudinal process is defined in terms of a proportional-odds cumulative logit model. Time-to-event is modeled through a left-truncated proportionalhazards model, which incorporates information of the longitudinal marker as well as baseline covariates. Both longitudinal and survival processes are connected by means of a common vector of random effects. General inferences are discussed under the Bayesian approach and include the posterior distribution of the probabilities associated to each longitudinal category and the …
Regression models for multivariate ordered responses via the Plackett distribution
2008
AbstractWe investigate the properties of a class of discrete multivariate distributions whose univariate marginals have ordered categories, all the bivariate marginals, like in the Plackett distribution, have log-odds ratios which do not depend on cut points and all higher-order interactions are constrained to 0. We show that this class of distributions may be interpreted as a discretized version of a multivariate continuous distribution having univariate logistic marginals. Convenient features of this class relative to the class of ordered probit models (the discretized version of the multivariate normal) are highlighted. Relevant properties of this distribution like quadratic log-linear e…
Multivariate statistical analysis for exploring road crash-related factors in the Franche-Comté region of France
2021
Understanding and modelling road crash data is crucial in fulfilling safety goals by helping national authorities to take necessary measures to reduce crash frequency and severity. This work aims at giving a multivariate statistical analysis of road crash data from the French region of Franche-Comte with special attention to road crash gravity. The first step for this multivariate analysis was to perform Multiple Correspondence Analysis in order to assess associations between the road crash injury and several important accident-related factors and circumstances. Log-linear models are used next in order to detect associations between road crash severity and related factors such as al-cohol/d…
Determinants of individual tourist expenditure as a network: Empirical findings from Uruguay
2014
Abstract This paper introduces the use of graphical models for assessing the determinants of individual tourist spending. These models have the advantage of synthesizing and visualizing the relationships occurring within large sets of random variables, through an easy to interpret output. To this end, individual data from a large official survey of international tourists in Uruguay are used. Symmetric conditional independence structures are first investigated. Then subgraphs of each expenditure item's neighbourhood are extracted in order to assess the impact of main effects and interactions through proportional ordinal logistic regression. Results highlight the marginal role of socio-demogr…
The Role of the Integrated Public Transport Network for Reducing the Congestion in the City of Palermo
2019
The railway link of Palermo is part of the Palermo – Trapani railway line and it is located in the urban site of Palermo. Works funded by the European Union have been started in 2008 for developing a metropolitan service through the improvement of the infrastructure and of the transport service characteristics. The aim of the paper is the analysis of the capacity of the railway infrastructure in terms of frequency and integration with the public transport service of Palermo. Using the Origin-Destination matrix of the Urban Transport Plan of Palermo, the competition between the private car mode and the public transport mode has been simulated, taking into account the improving of the railway…
Are oral health conditions associated with schoolchildren’s performance and school attendance in the Kingdom of Bahrain? A life‐course perspective
2021
Background: The link between oral diseases and school performance and school attendance remains unclear among Middle Eastern children.Aim: To investigate the relationship of oral conditions with schoolchildren's school performance and attendance using the life- course approach.Design: A cross- sectional study was conducted with 466 schoolchildren aged 7- 8 years from Kingdom of Bahrain (KoB) and their parents. Questionnaire data on children's current and at- birth environmental characteristics were completed by their parents. Children's oral health measures, including ICDAS (International Caries Detection and Assessment System), PUFA (pulp, ulcer, fistula, abscess), and DDE (developmental d…