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In this work, we consider extensions of the dual risk model with proportional gains by introducing dependence structures among gain sizes and gain interarrival times. Among others, we further consider the case where the proportionality parameter is randomly chosen, the case where it is a uniformly random variable, as well as the case where we may have upward as well as downward jumps. Moreover, we consider the case with causal dependence structure, as well as the case where the dependence is based on the generalized Farlie–Gumbel–Morgenstern copula. The ruin probability and the distribution of the time to ruin are investigated.
Focusing on methods for data that are ordered in time, this textbook provides a comprehensive guide to analyzing time series data using modern techniques from data science. It is specifically tailored to economics and finance applications, aiming to provide students with rigorous training. Chapters cover Bayesian approaches, nonparametric smoothing methods, machine learning, and continuous time econometrics. Theoretical and empirical exercises, concise summaries, bolded key terms, and illustrative examples are included throughout to reinforce key concepts and bolster understanding. Ancillary materials include an instructor's manual with solutions and additional exercises, PowerPoint lecture slides, and datasets. With its clear and accessible style, this textbook is an essential tool for advanced undergraduate and graduate students in economics, finance, and statistics.
This chapter introduces more formal concepts like stationarity and mixing, and explains why they are needed. We also define the autocorrelation function and describe its properties and how it is estimated from sample data. We discuss the properties of the estimator of the mean and autocorrelation, and how they can be used to conduct statistical inference.
The significance of our physical bodies is an important topic in contemporary philosophy and theology. Reflection on the body often assumes, even if only implicitly, idealizations that obscure important facts about what it means for humans to be 'enfleshed.' This Element explores a number of ways that reflection on bodies in their concrete particularities is important. It begins with a consideration of why certain forms of idealization are philosophically problematic. It then explores how a number of features of bodies can reveal important truths about human nature, embodiment, and dependence. Careful reflection on the body raises important questions related to community and interdependence. The Element concludes by exploring the ethical demands we face given human embodiment. Among other results, this Element exposes the reader to a wide diversity of human embodiment and the nature of human dependence, encouraging meaningful theological reflection on aspects of the human condition.
In this chapter contextual probabilistic entanglement is represented withinthe Hilbert space formalism. The notion of entanglement is clarified anddemystified through decoupling it from the tensor product structure andtreating it as a constraint posed by probabilistic dependence of quantum observablesA and B. In this framework, it is meaningless to speak aboutentanglement without pointing to the fixed observables A and B, so thisis AB-entanglement. Dependence of quantum observables is formalized asnon-coincidence of conditional probabilities. Starting with this probabilisticdefinition, we achieve the Hilbert space characterization of the AB-entangledstates as amplitude non-factorisable states. In the tensor productcase, AB-entanglement implies standard entanglement, but not vice versa.AB-entanglement for dichotomous observables is equivalent to their correlation. Finally, observables entanglement is compared with dependence of random variables in classical probability theory.
Multivariate regular variation is a key concept that has been applied in finance, insurance, and risk management. This paper proposes a new dependence assumption via a framework of multivariate regular variation. Under the condition that financial and insurance risks satisfy our assumption, we conduct asymptotic analyses for multidimensional ruin probabilities in the discrete-time and continuous-time cases. Also, we present a two-dimensional numerical example satisfying our assumption, through which we show the accuracy of the asymptotic result for the discrete-time multidimensional insurance risk model.
Chapter 4 presents the paradox of republican emancipation, a paradox based on the ambivalence of republican freedom at the time of the revolution. On the one hand, republican freedom is the status of those who are already masters of themselves. Freedom is independence and it is this independence that makes them capable of governing with competence and virtue. On the other, freedom is the newly claimed right of everyone, or anyone, not to be dominated – regardless of their virtue, or their economic and social situation, that is, regardless of their capacity to self-govern. But how can one reconcile the universal claim of freedom as nondomination with the republican supposition that the free person ought to be already socially, economically, and intellectually independent to be able to self-govern? If the many are incapable of self-governing, how can they ever become independent from the government of the few – how can they ever emancipate themselves? This chapter presents four instances of this paradox: the debate on passive/active citizenship, Condorcet’s position on the emancipation of slaves, Guyomar’s argument for the emancipation of women, and Grouchy’s proposal for changing the way we think about human dependence.
This chapter lays further conceptual foundation for the book’s proposed trust-based framework. It applies to the citizen-government relationship what I call the ‘network conception of trust’ from the social science scholarship. In doing so, it makes a claim of how trust functions in the social rights context. According to this conception, trust arises in, and depends on, complex structures or networks of relationships. Applying this conception to the citizen-government relationship, the chapter argues that in contemporary democracies, the citizen-government relationship arises in a network of relationships and that trust in the citizen-government relationship depends on the relationships that constitute the network – including, importantly, the relationship between citizens and the courts that arises out of the adjudication of social rights by courts. This argument adds nuance to our understanding of trust and lays foundation for my contention in Chapter 4 that the courts, via their enforcement of social rights, can foster citizens’ trust in the elected branches.
Edited by
Rachel Thomasson, Manchester Centre for Clinical Neurosciences,Elspeth Guthrie, Leeds Institute of Health Sciences,Allan House, Leeds Institute of Health Sciences
Complications of alcohol misuse are frequently encountered in the general hospital setting, as well as primary care and outpatient clinics. It is an essential part of the skillset of a consultation-liaison (CL) psychiatrist to be able to competently assess the scale of the problem, to offer advice and guidance on acute issues which may arise during intoxication and withdrawal and to orchestrate appropriate support and follow-up if a patient is willing to engage. This chapter aims to equip the reader with relevant epidemiology, some clinically useful biology and mathematics and a scaffold for building on previously acquired basics in terms of assessment and management of alcohol-related problems in the general hospital setting.
From the early days of national independence in 1975, the central aim of the educational policy in Mozambique has been to ensure that all school-age children have access to school and can remain there until they have completed their basic education. In the pursuit of this aim, the extension of access to primary education was relatively successful, given that it reached a net rate of school coverage of almost 100 per cent. However, the impressive increase in school attendance rates has not been accompanied by a corresponding improvement in the quality of learning, and there are worrying signs of a considerable setback in relation to this aspect. Using this observation as a starting point, this chapter identifies and analyses the variables in the institutional context behind ‘schooling without learning’. The results point to (i) weak state capacity; (ii) excessive dependence on external aid; and (iii) poor community involvement and participation in school management, as factors with a major influence on the poor quality of education in primary schools.
What are we to make of the sermon at the end of Either/Or? How does it stand in relation to the book’s preceding presentations of aesthetic and ethical life? Why is it presented under the title, “Ultimatum”? This chapter takes up these questions by showing how the sermon, and the fictional Jutland priest to whom it is attributed, serve to represent a certain development within ethical subjectivity. On the reading I develop, the sermon represents, namely, a way of trying to sustain a stance of participation in ethical life, in the face of experiences of human powerlessness and exposure to tragedy, without despair but also without succumbing to illusions of ethical independence. So understood, the sermon offers a perspective that, while it incorporates elements of both, provides a third alternative to the tragic outlook of “A” in Either/Or’s Volume 1 and the letters of Judge William in Volume 2.
Chapter four concentrates on a close analysis of Aquinas’s understanding of creation, which is undeniably crucial for any attempt at constructing and evaluating a Thomistic version of theistic evolutionism. The exposition of Aquinass philosophical theology of creation and his commentary on the work of six days in Genesis is preceded by an analysis of Augustine’s reading of the Hexameron, his use of the concept of rationes seminales, and the debate on whether his notion of creation can be interpreted as evolution-friendly.
A focus on care draws attention to the fact that ethical self-cultivation, even in traditions that foreground moral autonomy, relies upon relationships of dependence. The recognition of relational and ethical dependence is familiar to anthropologists and has long been central for feminist ethics. However, the enormous body of anthropological scholarship that has emerged on care over the last decade raises the question of ethical dependence anew. This chapter problematizes the concept of care. It asks: how might ‘care’ as a topic, and as engaged ethnographically, trouble some of the ways that ethical life more broadly has been conceived in the philosophical and anthropological literature? Conversely, how might attention to the ethical stakes of care trouble some of the rich ethnographic scholarship on care? The chapter draws most substantially on anthropological and philosophical scholarship in virtue ethics and in phenomenology to consider both the relational complexities of care and care’s ineffable and elusive ethical dimensions.
Edited by
Ornella Corazza, University of Hertfordshire and University of Trento, Italy,Artemisa Rocha Dores, Polytechnic Institute of Porto and University of Porto, Portugal
Metacognitions, or the beliefs one holds about internal mental states and the strategies aimed at controlling them, are known to play a significant role in the development and maintenance of addictive behaviours. However, only very limited research has investigated the role of metacognitions in exercise addiction (EA). This chapter describes the case of a 36-year-old woman with EA, whose metacognitive strategies appeared to be directly linked to her addictive behaviour. The risky behaviours and detrimental effects on other aspects of life that are observed in individuals with EA appear to be as harmful to their physical and mental health as are the addiction-related behaviours and effects observed among people with substance use disorders. It is proposed that EA is a specific behavioural addiction that merits inclusion as a mental disorder in the International Classification of Diseases and the Diagnostic and Statistical Manual of Mental Disorders.
Benzodiazepines have attracted controversy from shortly after their introduction. They have been subject to periodic calls for their use to be re-evaluated on the basis that their risks have been overstated and their benefits underappreciated. Claims made in recent editorials from the International Task Force on Benzodiazepines in support of their wider use are critiqued in this issue. I examine here whether there is a case to change the conclusions of previous reconsiderations of the question.
This Element examines the contemporary literature on essence in connection with the traditional question whether essence lies within or without our world. Section 1 understands this question in terms of a certain distinction, the distinction between active and latent facts. Section 2 steps back to investigate the connections between essence and other philosophical concepts. Section 3 brings the results of this investigation to bear on the traditional question, sketching an argument from the premise that essentialist facts are explained by the origins of things to the conclusion that such facts are active.
Chapter 5 examines Plato's account of the "fevered" polis in exploring the thesis that societies are to be understood as composed of parts well suited to carry out specific functions and that it is primarily in this respect that they resemble biological organisms. Thus, in the healthy polis each part carries out the specific function appropriate to it, and functions are coordinated such that all are well executed and society's essential needs satisfied. From Plato we learn that a defensible account of social pathology embraces a weak holism, according to which "ill" may apply to society as a whole without any part of it being ill (since it is institutions or societies that are dysfunctional, not individuals). At the same time, it eschews strong a normative holism that holds that things can be good or bad for societies without them also being good or bad for individual members.
Tobacco-use is currently one of the major public health problems and is more common among patients with schizophrenia.
Objectives
We aimed in this study to estimate the prevalence of smoking in a population of patients with schizophrenia, to assess tobacco dependence and to identify its correlated factors.
Methods
This is a descriptive and analytical cross-sectional study carried out on 50 outpatients at the Department of Psychiatry (Tunisia) over a period of two months. For the data collection, we used: a general questionnaire on sociodemographic characteristics and tobacco consumption and the Fagerström test for nicotine dependence.
Results
All the patients were male with a mean age of 32.7±7.02 years and 84% of them were tobacco consumers. More than half of the sample were single (68%) and had a primary school level (52%). A professional irregularity and low socio-economic level were found successively in 84% and 78% of cases. Half of the patients (52%) were diagnosed with paranoid schizophrenia and 46% of them were treated by atypical antipsychotics. Cigarette dependence was strong or very strong in 82% according to the Fagerstrom test. A positive correlation was found between strong tobacco dependence on the one hand and low socio-economic level, professional irregularity, smoking in a first-degree relative and treatment with a typical neuroleptic on the other hand.
Conclusions
Our study and data from the literature show that subjects with schizophrenia constitute a population of highly dependent smokers. A smoking cessation assistance program for this vulnerable population is a priority to improve their quality of life.
The relationship between religion and concern for the environment has not always been an easy one. Theological ascription of ultimate value to God, rather than to creatures, has been said to underlie ecological destruction, exacerbated also by religious notions of human uniqueness. Conversely, some religious groups have feared that concern for nature will risk deflecting attention from God. Faced with such a stand-off, we turn to the idea of ‘participation’ – of partaking from, or sharing in – which offers common ground between these two domains, with its sense of dependence and derivation. From a theological perspective (here concentrating on the Christian tradition), particular emphasis will fall on the idea of creation as good gift, and on the derivation of all things from God, in all of their aspects. From the side of biology, themes of participation appear both in the form of ecological dependence in the present and of evolutionary relations of derivation and reception running down biological history. Approached in these terms, the theologian conviction that creation is not ultimate need not degrade it, nor need attention to creation stand in competition with religious devotion.
While taking advantage of the educational benefits of smartphones, students also apply this device in inappropriate ways that cause certain disciplinary and educational problems. This study examines the effect of self-management training on smartphone dependence among male high school students. Methods: In this quasi-experimental study, data were collected using the Cell Phone Addiction Scale (Koo, 2009), which was completed by the trial and control groups before and after the educational intervention. After assessing their normal distribution, the data were analysed using the Chi-square test, the independent and paired t-tests, Mann–Whitney's U-test, and the Wilcoxon test at a significance level of p < .05. Results: The results showed significant post-intervention reductions in the mean score of smartphone dependence (35.10) and its three domains, including withdrawal/tolerance (14.80), life dysfunction (8.70), and compulsion/persistence (11.60), in the trial group compared to the controls (44.80, 16.2, 12.10, and 16.50) and also in the mean score of certain applications of smartphones (p < .05). Discussion and conclusions: Despite the existing limitations, the results confirmed the efficacy of self-management training in reducing smartphone dependence in the students. The implementation of this programme is recommended for reducing dependence and promoting the proper use of this device.