到目前為止，國內外對信用分配的實證研究，大抵不脫以總體資料(aggregate datas)說明在貨幣政策的傳導機制中「信用管道」(credit channel)的存在，但要以此解釋信用分配的現象則略顯不足，我們需要的是更直接的證據：那就是在信用管道背後，銀行用來壓抑地雷公司借款的「篩選工具」(Screening Devices)！ 本文便以分析整理個別公司借款資料的方式進行實證研究，首度將樣本區分為「地雷公司」與「正常公司」，以及「金融風暴前、後」的不同時期，並以「臨界放款利率」作為判斷標準。 本文得到以下三點結論： 1. 在三種樣本期間，地雷公司與正常公司所面對的放款供給曲線，幾乎都有後彎現象（除正常公司在金融風暴前例外），表示信用分配現象的確存在，且銀行以利率為信用篩選工具。 2. 在全部樣本期間與金融風暴後，地雷公司所面對的臨界放款利率均較正常公司為低，表示銀行對地雷公司與正常公司的臨界放款利率的確有異，且銀行成功以「數量」壓抑地雷公司借款。 3. 地雷公司與正常公司在金融風暴後，臨界放款利率均有所降低，且地雷公司臨界放款利率降幅（與全部樣本期間相較）較正常公司高出11個百分點，表示「金融風暴」的確會影響銀行授信態度，且對地雷公司影響較大。 實證結果與研究假說一致，並符合我們的直覺。

絕對多數候選人的票源並不是很均勻地分散在各地，反而都有一些表現在水準之上。本論文的焦點放在這些最強的地區。 首先正式定義候選人的「選舉地盤」以及兩個衡量地盤規模指標「強度」與「重要度」。以這些概念描述地盤與選區許多人文區位以及候選人個人特質的關係如何。結果發現最健全的地盤是由當選的男性國民黨籍候選人所建立的，且在農民偏多、教育程度偏低的地區。 接者，本論文探索地盤對政黨票源的影響如何。透過迴歸分析，可發現新黨候選人的地盤可說是強制配票策略的一個副產物。另外，本論文使用一個個案研究來討論國民黨責任區配票制度對地盤的影響力，發現地緣因素可能比配票制度還重要。再者，針對地盤是否增加政黨票源的問題，發現如果先控制所有黨籍候選人在全選區的表現後，候選人在其地盤確實會增加政黨的票源。 最後，本論文探討地盤在多次選舉的穩定性。首先建立兩個指標，即「守住值」與「增長值」，衡量兩次選舉地盤之間的穩定程度。以這兩個指標，發現一般候選人從一次選舉地盤到下次選舉地盤其實相當不穩定，兩次票源有頗大差異。接者，就再進一步探索何種地盤較穩定。一般地盤是由三部分所構成，即「盤心」、「盤邊」與「碎盤」。其中，盤心包含候選人故鄉，是地盤最穩定的一部分，最穩定的地盤都是大盤心型。最後，討論票源移轉的問題，許多政治力量，如家族、派系、黃復興黨部等等有無共享同一個票源。結果，可發現這些政治力量都有一個或大或小的「穩定地盤」，穩定地盤的票源都可以轉來轉去。 第一章 緒論 壹 研究動機與目的 貳 文獻檢閱 參 研究性質與方法 第二章 地盤及其特徵 壹 分析方法 貳 各種自變數對地盤單獨的影響 參 交互作用 肆 「一般」地盤的例子 伍 小結 第三章 政黨與地盤 壹 分析方法 貳 地盤為配票的副產物 參 國民黨候選人地盤為責任區 肆 政黨票源的增減與地盤的關係 伍 1995年高雄縣立法委員選舉 陸 小結 第四章 地盤的穩定性 壹 分析方法 貳 地盤的穩定程度：以尋求連任的候選人為例 參 地盤的結構 肆 地盤的分類 伍 票源的移轉 陸 小結 第五章 結論 壹 研究發現 貳 檢討與建議 / The support of the overwhelming candidates is not evenly spread over all areas. Instead, most candidates have certain areas in which they reap a number of votes well above the average for the whole district. These strongest areas are the focus of this thesis. We start by defining an "electoral base" as well as two indices to measure the scope of the base, "strength" and "importance." These concepts are used to describe the relationships between bases and several independent variables, including the demographic features of the electoral district and the particular attributes of the candidate. We find that bases are largest and most intense for winning, male, KMT candidates running in districts with high numbers of farmers and low overall education levels. The next section of the thesis deals with the relations between bases and political parties. Through regression analysis, we find that the bases of New Party candidates are actually just a by-product of the New Party's vote rationing system. We consider the possibility that KMT bases also result from the KMT's responsibility zone vote rationing system. However, a case study shows that localism seems to be more directly related to the bases that eventually take shape than the responsibility zone system. Next, we look into the question of whether bases increase a party's votes. We find that if the overall performance of the party's candidates in the entire electoral district is controlled, parties do get increased amounts of votes inside the bases of their candidates. In effect, bases do increase the number of votes the party gets. The final section of the thesis addresses the question of stability of bases over time. First, two indices, "defense" and "growth" are introduced to measure the stability of bases from one election to the next. We find that from the base of a candidate in one election to the base of the same candidate in the next election, there is a surprisingly large amount of instability; candidates' strongest areas in one election may not be their strongest areas in the next election. Faced with this finding, we look for the keys to stability. One key lies in the structure of the base. Most bases can be divided into three parts: "central areas," "adjacent areas," and "scattered areas." The central areas include the candidate's home town and are the most stable part of the base. The candidate's with the most stable bases tend to be those with large central areas. Finally, we look at the question of whether votes are transferable. Many different political forces are considered, including political families, local factions, and the KMT's military party branch. These forces all have a "core" of support which is stable and can be transferred among different candidates from the group.

Made available in DSpace on 2014-12-17T15:53:15Z (GMT). No. of bitstreams: 1 RidalvoMAO.pdf: 983858 bytes, checksum: 9d7af440fc2e650709bb958e39fbb63a (MD5) Previous issue date: 2003-10-31 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / This work verifies the impact caused by the Emergencial Program of Reduction of Consumption of Electric Energy (energy-rationing program) in the results of the concessionary private companies of the public service of electric energy distribution localized in the Northeast Area. As the rationing invigorated from June 2001 to February 2002, its effects are diluted in the results presented by these companies in the second semester of 2001 and first quarter of 2002, with prominence for the last quarter of 2001, when the revenue of extraordinary tariff restore was instituted by the National Agency of Electric Energy (ANEEL), consequence of the so-called General Agreement of the Electric Sector made between the federal government and the companies of the electric sector. The structure of a generic electric sector and a historical review of the Brazilian electric sector from the time it was controlled by the private enterprises, including the State control period, about 1960, and returning to the control of the private enterprises in 1990, under a new regulation structure are presented. An explanation of the models of economic regulation that Brazil used for the electric sector is made, with prominence for the price cap that is the actual effective model. The process of tariff revision foreseen in the concession contracts signed by the federal government and the concessionary companies is presented, highlighting its two stages: the tariff rebalancing that defines the new price cap and the calculation of the factor X that establishes the efficiency goals for the companies. There is made a presentation of the Emergencial Program of Reduction of Consumption of Electric Energy and of the consequent General Agreement of the Electric Sector, which created the revenue of extraordinary tariff restore. A conceptual revision on reviews is presented, regarding to concepts, accomplishment and recognition. A brief review of the six companies that made part of the worked sample is also presented. Analyzing the quarters historical review and of amount of sold energy, it was possible to conclude that the energy-rationing altered the results of the studied companies significantly and that alteration was masked by the accounting process of the revenue of extraordinary tariff restore / Este trabalho verifica o impacto provocado pelo Programa Emergencial de Redu??o de Consumo de Energia El?trica (racionamento) nos resultados das empresas privadas concession?rias do servi?o p?blico de distribui??o de energia el?trica situadas na Regi?o Nordeste. Como o racionamento vigorou de junho de 2001 a fevereiro de 2002, os seus efeitos est?o dilu?dos nos resultados apresentados pelas empresas no segundo semestre de 2001 e primeiro trimestre de 2002, com destaque para o ?ltimo trimestre de 2001, quando foi institu?da pela Ag?ncia Nacional de Energia El?trica (ANEEL) a receita de recomposi??o tarif?ria extraordin?ria, fruto do chamado Acordo Geral do Setor El?trico pactuado entre o governo federal e as empresas do setor el?trico. Apresenta a estrutura de um setor el?trico gen?rico e uma revis?o hist?rica do setor el?trico brasileiro abrangendo desde a ?poca em que era controlado por empresas privadas, passando pelo per?odo de estatiza??o, por volta de 1960, e retornando ao controle da iniciativa privada em meados de 1990, sob uma nova estrutura de regula??o. ? feita uma explana??o sobre os modelos de regula??o econ?mica que o Brasil utilizou para o setor el?trico, com destaque para o price cap, que ? o modelo vigente atualmente. Apresenta o processo de revis?o tarif?ria prevista nos contratos de concess?o assinados pelo governo federal e pelas empresas concession?rias, destacando suas duas etapas: o reposicionamento tarif?rio, que define o novo pre?o-teto, e o c?lculo do fator X , que estabelece as metas de efici?ncia para as empresas. ? feita uma apresenta??o do Programa Emergencial de Redu??o de Consumo de Energia El?trica e do conseq?ente Acordo Geral do Setor El?trico, que deu origem ? receita de recomposi??o tarif?ria extraordin?ria. Apresenta uma revis?o conceitual sobre receitas, no que tange a conceitos, realiza??o e reconhecimento. Apresenta um breve hist?rico das seis empresas que fizeram parte da amostra trabalhada. Analisando os hist?ricos trimestrais de receita e de volume de energia vendida, foi poss?vel concluir que o racionamento de energia alterou significativamente os resultados das empresas estudadas e que essa altera??o foi mascarada pela medida cont?bil da receita de recomposi??o tarif?ria extraordin?ria

Au cours des années 2000, les gouvernements britanniques néo-travaillistes de Tony Blair et Gordon Brown ont porté un projet de politique publique appelé «Carte carbone», consistant à instaurer des quotas individuels d’émissions pour les particuliers. Ce projet avait initialement été formulé en 1996 par des chercheurs écologistes qui, en s’inspirant des politiques de rationnement passées, ont contribué à faire émerger un nouveau référentiel d’action publique structuré par l’idée de la finitude du monde. La mise à l’agenda de ce projet par les néo-travaillistes a cependant été suivie d’un travail de réinterprétation des limites environnementales, tendant à mettre à distance l’idée de finitude pour mieux concilier la carte carbone avec le référentiel environnementaliste de la modernisation écologique. Ce travail d’interprétation s’est doublé d’un processus d’aménagement des limites environnementales, encore éloignées par la rencontre du macrosystème énergétique avec les instruments du nouveau management public. Au terme de ce processus, le report sine die de la carte carbone témoigne d’une nouvelle relégation des limites environnementales aux marges de l’action publique. L’étude sociologique de la trajectoire institutionnelle de ce projet d’action publique vise à nourrir une réflexion plus théorique sur les difficultés d’émergence d’un référentiel de la finitude au temps de la crise écologique globale. À la lumière des travaux de la sociologie environnementale, il s’agira de montrer comment les réflexions politiques sur le rationnement participent à la recherche d’autres modalités de gouvernement dans un monde fini. / During the 2000s, the British New Labour governments of Tony Blair and Gordon Brown have contemplated implementing a public policy called “Carbon card”, which consisted of allocating tradable emission rights to individuals. This project had originally been formulated in 1996 by green researchers who, drawing on past rationing policies, have contributed with this Carbon card to the emergence of a new public policy “référentiel” structured by the idea of ecological finiteness. Once agenda status was attained, however, this project was subjected to a reinterpretation of its environmental limits frame, that tended to relegate the idea of finitude, in an attempt to better conciliate the Carbon card with the ecological modernisation référentiel. This interpretation was coupled with a technical softening of environmental limits, still more relativized by the junction operated between the energy macrosystem and New Public Management-inspired policy instruments. At the outcome of this process, the indefinite postponement of the Carbon card reveals a renewed relegation of environmental limits to the margins of public action. The sociological study of the Carbon card’s institutional trajectory aims at feeding into a theoretical analysis of the obstacles to the emergence of a finitude référentiel, in a time of global ecological crisis. Drawing from environmental sociology, this work aims at showing that public policy research on rationing might contribute to investigating different ways of governing for a finite world.

Made available in DSpace on 2010-04-20T20:08:07Z (GMT). No. of bitstreams: 1 67386.pdf: 650835 bytes, checksum: 0059a5a54d54d0041cd955f3042634a0 (MD5) Previous issue date: 2007-12-18T00:00:00Z / Neste trabalho, o mercado brasileiro de crédito para pequenas e médias empresas (PMEs) é analisado sob a perspectiva do marketing adaptativo, em que se assume que atividades mercadológicas como segmentação, gestão de relacionamento com clientes, apreçamento e desenvolvimento de produtos, são determinadas pela utilidade obtida por agentes de mercado ao atenderem a demanda. Identifica-se que a existência de assimetria de informações e de custos de transação limita e direciona as atividades de marketing no mercado estudado. A partir de uma amostra com 65.535 propostas de crédito, recebidas e avaliadas por um grande banco brasileiro entre janeiro de 2004 e setembro de 2006, estima-se a utilidade do banco em operações de crédito. Adicionalmente, 17.149 transações de empréstimos concedidos pelo banco ao segmento de pequenas empresas entre abril de 2006 e março de 2007, são investigadas. Finalmente, um conjunto de dados com 1,636 registros obtidos pela junção das bases de dados de propostas e de transações mencionados, é analisado em termos das relações entre taxas de juros e os totais de cobertura oferecidas por meio de garantias de crédito. Os resultados revelam a existência de um ambiente de marketing adaptativo, em que os pequenos tomadores de crédito produtivo são racionados, e aceitam pagar taxas de juros mais elevadas do que outros segmentos. Produtos de créditos baseados em garantias líquidas e com altas taxas de juros são desenvolvidos para suprir de maneira oportuna este segmento racionado de pequenas empresas. Ademais, a utilidade do banco em operações de crédito é afetada pela informação privada que captura ao longo de relacionamentos mantidos com seus cientes. Os resultados implicam que o sistema de marketing financeiro brasileiro não desempenha papel formativo no desenvolvimento econômico, que seria de fomento ao crédito produtivo por meio de empréstimos a baixo custo para pequenas e médias empresas. Um sistema formativo de marketing é improvável em um ambiente com informação imperfeita, como o mercado de crédito brasileiro. O estudo traz informações úteis àqueles interessados no desenvolvimento de mercados de crédito produtivo, tais como profissionais de instituições financeiras; agentes responsáveis por políticas públicas e monetárias de fomento ao crédito; e empreendedores de pequeno e médio porte que necessitem de financiamento externo para seus negócios. / In this work, the Brazilian credit market for small and medium-sized enterprises (SMEs) is analyzed from an adaptive marketing perspective, in which marketing activities such as segmentation, customer relationship management, pricing and product development are determined by the utility that market players get when they satisfy the demand. The existence of information asymmetry and transaction costs is identified to limit and drive marketing initiatives in the studied credit market. From a sample of 65,535 credit proposals analyzed by a large Brazilian bank from January 2004 to September 2006, the bank’s utility in a credit transaction is studied. Additionally, 17,149 credit transactions provided by the bank to the small business segment from April 2006 to March 2007 are investigated. Finally, a data set with 1,636 registers, obtained from the merge of the mentioned samples of proposals and transactions, is investigated in terms of the relations between interest rates and the collateral committed in credit proposals. The results reveal the existence of an adaptive marketing environment, in which small business borrowers are credit rationed and accept to pay higher interest rates than other segments. Credit products based on liquid collateral and high interest rates are designed to opportunistically supply this rationed small business segment. Also, the bank’s utility from a credit transaction is affected by the private information it captures along its relationships with customers. Findings imply that the Brazilian financial marketing system does not perform a formative function in economic development, which would be to foster the demand for productive credit by means of low-priced loans to small and medium-sized enterprises. However, a formative marketing system is not likely to occur in an environment characterized by imperfect information, like the Brazilian credit market. This study provides relevant information to those who are interested in the development of productive credit markets, like professionals of financial institutions; public and monetary policy makers; and small and medium-sized business entrepreneurs whose businesses face the need for external funding.

This thesis examines the relationship of monetary policy and investment in a theoretical framework in which monetary and real economic forces are intrinsically interlinked. The full shift from a money, real dichotomy in historical economic thought to the notion of money being an essential determinant of economic outcomes is traced to the work of Keynes, partly in the Treatise (1930), but more completely in the General Theory (1936). The treatment of monetary forces in economic growth models is examined. It is found that the money, investment relationship, with close money, real interaction, is appropriately pursued in the approach to monetary theory adopted by those who could broadly be characterised as Post Keynesian. The operation of monetary forces through the banking system is examined using this theoretical backdrop. A symbolic model is developed of the influence channels implied by the theoretical analysis, using the South African monetary system as the specific focus. The symbolic model is expressed in a form which enables empirical examination. South African data are compiled and used to determine the nature and statistical significance of hypothesised relationships. The implications of the theoretical analysis and empirical examination are drawn out both for monetary theory within the Post Keynesian mould, and for the conduct of monetary policy, in South Africa in particular. / Economics / D. Litt. et Phil. (Economics)

Introdução: Triagem para admissão em unidades de terapia intensiva (UTIs) é realizada rotineiramente e é comumente baseada somente no julgamento clínico, o que pode mascarar vieses e preconceitos. Neste estudo, foram avaliadas a reprodutibilidade e validade de um algoritmo de apoio a decisões de triagem em UTI. Também foi avaliado o efeito da implementação de um instrumento de auxílio à tomada de decisão para a priorização de vagas de UTI nas decisões de admissão em UTI. Foi avaliada, ainda, a acurácia da predição prognóstica dos médicos na população de pacientes em deterioração clínica aguda. Métodos: Para o primeiro objetivo do estudo, um algoritmo computadorizado para auxiliar as decisões de priorização de vagas em UTI foi desenvolvido para classificar pacientes nas categorias do sistema de priorização da \"Society of Critical Care Medicine (SCCM)\". Nove médicos experientes (experts) avaliaram quarenta vinhetas clínicas baseadas em pacientes reais. A referência foi definida como as prioridades classificadas por dois investigadores com acesso ao prontuário completo dos pacientes. As concordâncias entre as prioridades do algoritmo com as prioridades da referência e com as prioridades dos experts foram avaliadas. As correlações entre a prioridade do algoritmo e o julgamento clínico de adequação da admissão na UTI em contexto com e sem escassez de vagas também foram avaliadas. A validade foi ainda avaliada através da aplicação do algoritmo, retrospectivamente em uma coorte de 603 pacientes com solicitação de vagas de UTI, para correlação com desfechos clínicos. Para o segundo objetivo do estudo, um estudo prospectivo, quaseexperimental foi conduzido, antes (maio/2014 a novembro/2014, fase 1) e após (novembro/2014 a maio/2015, fase 2) a implementação de um instrumento de auxílio à tomada de decisão, que foi baseado no algoritmo descrito acima. Foi avaliado o impacto da implementação do instrumento de auxílio à tomada de decisão na ocorrência de admissões potencialmente inapropriadas na UTI em uma coorte de pacientes com solicitações urgentes de vaga de UTI. O desfecho primário foi a proporção de solicitações de vaga potencialmente inapropriadas que foram admitidas na UTI em até 48 horas após a solicitação. Solicitações de vaga potencialmente inapropriadas foram definidas como pacientes prioridade 4B, conforme diretrizes da SCCM de 1999, ou prioridade 5, conforme diretrizes da SCCM de 2016. Foram realizadas análises multivariadas com teste de interação entre fase e prioridades para avaliação dos efeitos diferenciados em cada estrato de prioridade. Para o terceiro objetivo do estudo, a predição prognóstica realizada pelo médico solicitante foi registrada no momento da solicitação de vaga de UTI. Resultados: No primeiro objetivo do estudo, a concordância entre as prioridades do algoritmo e as prioridades da referência foi substancial, com uma mediana de kappa de 0,72 (IQR 0,52-0,77). As prioridades do algoritmo evidenciaram uma maior reprodutibilidade entre os pares [kappa = 0,61 (IC95% 0,57-0,65) e mediana de percentagem de concordância = 0,64 (IQR 0,59-0,70)], quando comparada à reprodutibilidade entre os pares das prioridades dos experts [kappa = 0,51 (IC95% 0,47-0,55) e mediana de percentagem de concordância = 0,49 (IQR 0,44-0,56)], p=0,001. As prioridades do algoritmo também foram associadas ao julgamento clínico de adequação da admissão na UTI (vinhetas com prioridades 1, 2, 3 e 4 seriam admitidas no último leito de UTI em 83,7%, 61,2%, 45,2% e 16,8% dos cenários, respectivamente, p < 0,001) e com desfechos clínicos reais na coorte retrospectiva, como admissão na UTI, consultas com equipe de cuidados paliativos e mortalidade hospitalar. No segundo objetivo do estudo, 2374 solicitações urgentes de vaga de UTI foram avaliadas, das quais 1184 (53,8%) pacientes foram admitidos na UTI. A implementação do instrumento de auxílio à tomada de decisão foi associada com uma redução de admissões potencialmente inapropriadas na UTI, tanto utilizando a classificação de 1999 [adjOR (IC95%) = 0,36 (0,13-0,97), p = 0,043], quanto utilizando a classificação de 2016 [adjOR (IC95%) = 0,35 (0,13-0,96, p = 0,041)]. Não houve diferença em mortalidade entre as fases 1 e 2 do estudo. No terceiro objetivo do estudo, a predição prognóstica do médico solicitante foi associada com mortalidade. Ocorreram 593 (34,4%), 215 (66,4%) e 51 (94,4%) óbitos nos grupos com prognóstico de sobrevivência sem sequelas graves, sobrevivência com sequelas graves e nãosobrevivência, respectivamente (p < 0,001). Sensibilidade foi 31%, especificidade foi 91% e a área sob a curva ROC foi de 0,61 para predição de mortalidade hospitalar. Após análise multivariada, a gravidade da doença aguda, funcionalidade prévia e admissão na UTI foram associadas com uma maior chance de erro prognóstico, enquanto que uma predição de pior prognóstico foi associada a uma menor chance de erro prognóstico. O grau de expertise do médico solicitante não teve efeito na predição prognóstica. Discussão/Conclusão: Neste estudo, um algoritmo de apoio a decisões de triagem em UTI demonstrou boa reprodutibilidade e validade. Além disso, a implementação de um instrumento de auxílio à tomada de decisões para priorização de vagas de UTI foi associada a uma redução de admissões potencialmente inapropriadas na UTI. Também foi encontrado que a predição prognóstica dos médicos solicitantes foi associada a mortalidade hospitalar, porém a acurácia foi pobre, principalmente devido a uma baixa sensibilidade para detectar risco de morte / Introduction: Intensive care unit (ICU) admission triage is performed routinely and is often based solely on clinical judgment, which could mask biases. In this study, we sought to evaluate the reliability and validity of an algorithm to aid ICU triage decisions. We also aimed to evaluate the effect of implementing a decision-aid tool for ICU triage on ICU admission decisions. We also evaluated the accuracy of physician\'s prediction of hospital mortality in in acutely deteriorating patients. Methods: For the first objective of the study, a computerized algorithm to aid ICU triage decisions was developed to classify patients into the Society of Critical Care Medicine\'s prioritization system. Nine senior physicians evaluated forty clinical vignettes based on real patients. Reference standard was defined as the priorities ascribed by two investigators with full access to patient\'s records. Agreement of algorithm-based priorities with the reference standard and with intuitive priorities provided by the physicians were evaluated. Correlations between algorithm prioritization and physician\'s judgment of appropriateness of ICU admission in scarcity and non-scarcity settings were also evaluated. Validity was further assessed by retrospectively applying this algorithm to 603 patients with requests for ICU admission for association with clinical outcomes. For the second objective of the study, a prospective, quasi-experimental study was conducted, before (May 2014 to November 2014, phase 1) and after (November 2014 to May 2015, phase 2) the implementation of a decision-aid tool for ICU admission triage, which was based on the aforementioned algorithm. We assessed the impact of the implementation of the decision-aid tool in potentially inappropriate ICU admissions in a cohort of patients referred for urgent ICU admission. Primary outcome was the proportion of potentially inappropriate ICU referrals that were admitted to the ICU in 48 hours following referral. Potentially inappropriate ICU referrals were defined as priority 4B patients, as described by the 1999 Society of Critical Care Medicine (SCCM) guidelines and as priority 5 patients, as described by the 2016 SCCM guidelines. We conducted multivariate analyses and evaluated the interaction between phase and triage priorities to assess for differential effects in each priority strata. For the third objective of the study, physicians\' prognosis and other variables were recorded at the moment of ICU referral. Results: On the first objective of the study, agreement between algorithm-based priorities and the reference standard was substantial, with a median kappa of 0.72 (IQR 0.52-0.77). Algorithm-based priorities demonstrated higher interrater reliability [overall kappa of 0.61 (95%CI 0.57-0.65) and median percent agreement of 0.64 (IQR 0.59-0.70)] than physician\'s intuitive prioritization [overall kappa of 0.51 (95%CI 0.47-0.55) and median percent agreement of 0.49 (IQR 0.44-0.56)], p=0.001. Algorithm-based priorities were also associated with physicians\' judgment of appropriateness of ICU admission (priorities 1, 2, 3 and 4 vignettes would be admitted to the last ICU bed in 83.7%, 61.2%, 45.2% and 16.8% of the scenarios, respectively, p < 0.001) and with actual ICU admission, palliative care consultation and hospital mortality in the retrospective cohort. On the second objective of the study, of 2374 urgent ICU referrals, 1184 (53.8%) patients were admitted to the ICU. Implementation of the decision-aid tool was associated with a reduction of potentially inappropriate ICU admissions using the 1999 [adjOR (95% CI) = 0.36 (0.13-0.97), p = 0.043] or 2016 [adjOR (95%CI) = 0.35 (0.13-0.96, p = 0.041)] definitions. There was no difference on mortality between phases 1 and 2. On the third objective of the study, physician\'s prognosis was associated to hospital mortality. There were 593 (34.4%), 215 (66.4%) and 51 (94.4%) deaths in the groups ascribed a prognosis of survival without disabilities, survival with severe disabilities or no survival, respectively (p < 0.001). Sensitivity was 31%, specificity was 91% and the area under the ROC curve was 0.61 for prediction of mortality. After multivariable analysis, severity of illness, performance status and ICU admission were associated to an increased likelihood of incorrect classification, while worse predicted prognosis was associated to a lower chance of incorrect classification. Physician\'s level of expertise had no effect on predictive ability. Discussion/Conclusion: In this study, a ICU admission triage algorithm demonstrated good reliability and validity. Moreover, the implementation of a decision-aid tool for ICU triage was associated with a reduction of potentially inappropriate ICU admissions. It was also found that physician\'s prediction was associated to hospital mortality, but overall accuracy was poor, mainly due to low sensitivity to detect mortality risk

[pt] Nesta dissertação é desenvolvida uma metodologia para previsão de demanda mensal de energia elétrica considerando cenários de racionamento. A metodologia usada consiste em, a partir das taxas de crescimento da série temporal, identificar e eliminar os efeitos do racionamento de energia elétrica através da aplicação de Modelos Lineares Dinâmicos. São analisadas também estruturas de intervenção nos modelos estatísticos de Box & Jenkins e Holt & Winters. Os modelos são então comparados segundo alguns critérios, basicamente no que tange à sua eficiência preditiva. Conclui-se ao final sobre a eficiência da metodologia proposta, dado a grande dificuldade para solucionar o problema a partir dos modelos estatísticos de Box & Jenkins e Holt & Winters. Esta solução é então proposta como a mais viável para criar cenários de racionamento e pósracionamento de energia para ser utilizado por agentes do sistema elétrico nacional. / [en] In this dissertation, a methodology is developed to forecast monthly demand of electric energy, considering the rationing scenery. The methodology is based on, taking the growth rate from the time series, identify and eliminate the effects of electric energy rationing, using Dynamic Linear Models. It is also analyzed intervention structures in the statistics models of Box & Jenkins and Holt & Winters. The models are compared according to some criterions, mainly forecast accuracy. At the end, we concluded that the methodology proposed is more efficient, due to the difficult to solve the problem using the statistics models with intervention. This solution is proposed as the best among them to create scenery during the energy rationing and after energy rationing, to be used by the national electric system agents.

Les enquêtes préférences déclarées (EPD) reposent sur des mises en situation hypothétiques. Face à une situation de choix construite de toute pièce par l’analyste, chaque répondant doit déclarer le choix qu’il ferait s’il y était confronté en réalité. Chaque situation se présente comme la combinaison de plusieurs paramètres. Face à chacune des diverses situations qui lui sont présentées successivement, l’enquêté va devoir faire le choix de celles lui convenant le mieux. Au fil du questionnaire, ses réponses révèleront l’importance qu’il donne à chaque paramètre et contribueront à une meilleure appréhension de ses préférences et de ses choix. Ce travail s’articule autour de trois études de cas mises en œuvre dans le cadre d’études menées par des opérateurs de transport (SNCF – thème : réforme de tarification sociale), des gestionnaires d’infrastructure (RFF – thème : effets du cadencement sur l’attractivité du train) ou des organismes de recherche (LET et PREDIT – thème : impact de politiques de rationnement du carburant sur la mobilité automobile). L’objet de ces études nécessitait la mise en œuvre d’enquêtes préférences déclarées. La conception, la mise en œuvre et l’analyse des EPD ont été réalisées dans le cadre de cette thèse avec un soucis permanent de contrôle de chacun des paramètres en vue de garantir la qualité des résultats obtenus.Selon les objectifs de l’étude, des traitements économétriques divers ont été utilisés pour analyser les données récoltées.Finalement, chacune de ces mises en place a contribué à renforcer notre conviction que les EPD constituent un outil complet. Ce travail contribue finalement, à son échelle, à crédibiliser un peu plus les méthodes de préférences déclarées et invite à repositionner cet outil d’analyse comme pivot de toute réflexion complexe dont le protocole est à réinventer lors de chaque construction, plutôt que tel qu’un procédé connu, livré clé en main, dont l’application suit une logique mécanique. / Stated preference surveys are based on choice sets composed by the analyst and proposed to some respondents. Each situation of the choice set is the combination of pre-determined attributes. While declaring the choice they would make if they were confronted to the same situation in reality, respondents reveal their preferences and their perceptions of the attributes.This Phd work presents the results of three stated preference surveys applied in the camp of public transportation. All surveys form a part of more general research programs handled for the sake: of the French railway operator, known as the SNCF (2006/2007) ; of the French railway network administrator, called RFF (2008) ; and of the French research, experimentation and innovation program in land transport, named PREDIT (2010). The use of stated preference methodology was required in order to deal efficiently with the issues of each of those research programs (respectively treating of social pricing ; train supply policy ; fuel rationing policies). The conception, the implementation and the analysis of the surveys have all been carried out during this Phd work in order to warranty control of each parameter and thus high quality results.In accordance with program research objectives, different econometrics treatments have been implemented.This Phd work shows how stated preference surveys may deal with different complex issues and therefore promote the use of this method. Each of these studies have finally strengthened the conviction that stated preferences constitute an efficient and complete tool.

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