Current approaches to document-level sentiment analysis rely on local information, e.g., the words within the given document. We try to achieve better performance by incorporating global context of the sentiment target (e.g., a movie or a product). We assume that sentiment labels of reviews about the same target are often consistent in some way. We model this consistency by Dirichlet distributi...

The aim of this paper is to introduce the Czech subjectivity lexicon, a new lexical resource for sentiment analysis in Czech. We describe particular stages of the manual refinement of the lexicon and demonstrate its use in the state-of-the art polarity classifiers, namely the Maximum Entropy classifier. We test the success rate of the system enriched with the dictionary on different data sets, ...

The work developed shows that Cluster Analysis appropriately answers the questions that arise when we try to frame socially and pedagogically the success/failure in a particular subject. Proposed worked developed a logistic regression analysis, as the study was carried out as a contribution to explain the success/failure in Exams. As a final step, the responses of both statistical analysis were...

When the difference between treatments in a clinical trial is estimated by a difference in means, then it is well known that randomization ensures unbiassed estimation, even if no account is taken of important baseline covariates. However, when the treatment effect is assessed by other summaries, for example by an odds ratio if the outcome is binary, then bias can arise if some covariates are o...

This study hypothesizes that women are less likely than men to use suicide methods that disfigure the face. Gender differences in the use of suicide methods that disfigure the face were examined using medical examiner’s files of 621 suicides covering a 10-year period from Summit County, Ohio in the U.S. Results showed that while firearms are the preferred method for both women and men, women we...

This paper discusses the findings of two surveys, undertaken in 2000 and 2001, which investigated relationships between home energy efficiency, socio-economic status and respondent health. Data were collected through interviews with an informant from each household and energy surveys. Respondents were drawn from relatively poor households. The main health measure used in the analysis, responden...

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Conventional multiclass conditional probability estimation methods, such as Fisher’s discriminate analysis and logistic regression, often require restrictive distributional model assumption. In this paper, a model-free estimation method is proposed to estimate multiclass conditional probability through a series of conditional quantile regression functions. Specifically, the conditional class pr...

In this paper we investigate whether technical efficiency is an important ex-ante predictor of business failure. We use samples of French textiles, wood, and R&D companies to obtain efficiency estimates for individual firms in each industry. These efficiency measures are derived from a directional technology distance function constructed empirically using non-parametric Data Envelopment Analysi...