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Laboratoire THEMA (Cergy-Pontoise)

Overview
Works: 14 works in 17 publications in 2 languages and 19 library holdings
Roles: Other, Degree grantor
Publication Timeline
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Most widely held works by Laboratoire THEMA (Cergy-Pontoise)
Education, fécondité et croissance économique en Tunisie by Olfa Frini( Book )

1 edition published in 2010 in French and held by 3 WorldCat member libraries worldwide

L'Homme est le bénéficiaire ultime et l'intrant essentiel du développement et de la croissance. Le capital humain identifié comme moteur de la croissance économique est fortement lié à la variable démographique. L'institution familiale par ses décisions de fécondité et d'investissement en éducation de ses membres est un préambule pour la formation du capital humain. L'intérêt est porté, alors, à l'interaction entre la quantité et la qualité de l'Homme. Notre étude de la croissance économique est conduite par l'analyse de la fécondité comme variable de croissance économique. Elle cherche à dégager les influences de la fécondité notamment par ses interactions avec l'éducation dans l'explication des performances économiques. Grâce à des analyses: macro et microéconomique, nous vérifions la présence d'une association éducation-fécondité et sa contribution dans le processus de la croissance pour la Tunisie. Une analyse quantitative dynamique du lien entre la fécondité, l'éducation et la croissance économique aussi bien à long terme qu'à court terme au cours de la période 1963-2007 est entreprise employant les techniques de séries temporelles. Aussi, une analyse quantitative de la fécondité : naturelle, désirée, réelle, de l'écart et de la régulation est mise en œuvre par des modèles micro économétriques tels que ceux de choix discret, de comptage et de durée. Elle prouve que le comportement des ménages est guidé par l'arbitrage entre la quantité et la qualité d'enfants et met en évidence les déterminants économiques et socioculturels. Ces analyses permettent d'annoncer les politiques cadrant le comportement familial de fécondité dans le processus de développement
Analyse du choix des investissements : options réelles et modes de production by Olfa Bouasker( Book )

2 editions published in 2010 in French and held by 2 WorldCat member libraries worldwide

Cette thèse traite du choix optimal des investissements à la lumière de la théorie des options réelles et de la prise en compte des différents modes de production. Nous proposons dans un premier temps plusieurs extensions du modèle d'investissement irréversible de Pindyck (1988): introduction de processus plus complexes pour décrire l'évolution de la valeur de marché et de fonctions de production très générales pour décrire l'activité de la firme ; prise en compte de l'aversion au risque dans un cadre d'optimisation dynamique. Dans un second temps, nous montrons comment les options d'échange de Margrabe (1978) permettent de résoudre certains problèmes de choix d'investissement. Nous en proposons diverses extensions et illustrations
Etude expérimentale de la rhéologie et du comportement des bétons autoplaçants (BAP) : influence des fines calcaires et des fibres végétales by Abdellah El Hilali( Book )

2 editions published in 2009 in French and held by 2 WorldCat member libraries worldwide

The research presented in this thesis develops a simple method for the formulation of self-compacting reference concrete containing limestone fillers and no added viscosity agent. The approach is dual: both experimental and theoretical (granular optimization) were conducted. The water and superplasticizer were determined through mini cone and Marsh cone tests conducted on the SCC paste. Effects of limestone filler fineness on rheological and mechanical properties of the SCC have been noteworthy. Three calcareous fillers have been introduced into the SCC paste, respectively noted "MFS", "LFE" and "MFO". The fillers had different Blaine Specific areas 'SB'. The results demonstrated that increasing the calcareous fillers' fineness amplified the demand for superplasticizer as well as increased its compactness and fluidity. Furthermore, it has been shown that the fillers with high 'SB' improved SCC durability relative to gas (CO2) and liquid diffusion; the concrete compressive strength was improved mainly at early curing ages. Also, the relationship between the elastic modulus and the SCC compressive strengths was independent of the fineness of the fillers and was very close to that recommended by ACI318-89. Is vegetable-fiber reinforced SCC mechanical strength as resistant as unreinforced SCC ? The main objective of this research was to answer this question. An experimental program was designed to study the influence of the introduction of short vegetable fibers issued from paper pulp recycling on the SCC's properties. Four types of vegetable fibers have been studied, noted FBA, FBB, FBC and FBD. They differ in their geometric characteristics and their cellulose concentrations. The introduction of the short vegetal fibers in the formulated reference SCC with constant binder dosages led to a significant increase in the paste's demand for water and superplasticizer, a decrease in concrete density, and an augmentation in permeability which reduced its mechanical strength and durability
Méthodes de sur et sous-solution pour la résolution des équations aux dérivées partielles non linéaires et contrôlabilité by Ferid Beldi( Book )

2 editions published in 2010 in French and held by 2 WorldCat member libraries worldwide

This thesis has as subject the study of nonlinear partial differential equations. It also deals with the controllability of some degenerate parabolic equations. In the first chapter, we recall some classical methods for the resolution of certain types of equations involving the p-Laplacian, by using the concept of lower and upper-solutions. These methods have some difficulties, especially in passages to the limit in the nonlinear terms linked to the p-Laplacian. For that we propose in the second chapter to solve such equations by using fixed point method based on the famous theorem of "Browder-Potter" which allowed us to avoid these disadvantages. In the third chapter, we study an evolution problem involving the p-laplacian, we prove existence and uniqueness result, and we obtain results on the asymptotic behaviour of solutions in time according to initial data. In the last chapter, and in order to focus on a nonlinear control problem involving the p-Laplacian, we study the one dimension linear control problem, we expose the results obtained for parabolic problems with degeneracy occurs at the interior of the space domain
Éducation, fécondité et croissance économique en Tunisie by Olfa Frini( )

1 edition published in 2010 in French and held by 1 WorldCat member library worldwide

Human is the final benefit and the essential input of economic growth and development. Human capital as an economic growth driving force is strongly influenced by demographic variables. Family institution is a preliminary for human capital accumulation considering its fertility and education investment in its member's decision. Hence, human capital analysis leads necessary to endogenous population growth. Then, our interest is focused to human quantity and quality interaction. Our economic growth investigation is so conducted by analysing fertility as economic growth variable. Our essay is to put out fertility influences notably by its interaction with education in explaining economic performances. Referring to macro and micro economic family analysis, we verify education/fertility relationship and its contribution in the growth process in Tunisian case. A long and short dynamic quantitative analysis of fertility, education and growth equilibrium relationship over the period 1963-2007 is undertaken using times series technique. Although a quantitative analysis of actual, desired, their gap, natural and regulation fertility is applied using micro econometric models such as dichotomous model, count data model and duration model. It attests that Tunisian household behaviour is shaped by quantity-quality children trade-off and also highlights economic and sociocultural fertility determinants. These analyses give out policies matching family fertility behaviour in the development process
Etude expérimentale de la rhéologie et du comportement des bétons autoplaçants (BAP) influence des fines calcaires et des fibres végétales by Abdellah El Hilali( )

1 edition published in 2010 in French and held by 1 WorldCat member library worldwide

The research presented in this thesis develops a simple method for the formulation of self-compacting reference concrete containing limestone fillers and no added viscosity agent. The approach is dual: both experimental and theoretical (granular optimization) were conducted. The water and superplasticizer were determined through mini cone and Marsh cone tests conducted on the SCC paste. Effects of limestone filler fineness on rheological and mechanical properties of the SCC have been noteworthy. Three calcareous fillers have been introduced into the SCC paste, respectively noted "MFS", "LFE" and "MFO". The fillers had different Blaine Specific areas 'SB'. The results demonstrated that increasing the calcareous fillers' fineness amplified the demand for superplasticizer as well as increased its compactness and fluidity. Furthermore, it has been shown that the fillers with high 'SB' improved SCC durability relative to gas (CO2) and liquid diffusion; the concrete compressive strength was improved mainly at early curing ages. Also, the relationship between the elastic modulus and the SCC compressive strengths was independent of the fineness of the fillers and was very close to that recommended by ACI318-89. Is vegetable-fiber reinforced SCC mechanical strength as resistant as unreinforced SCC ? The main objective of this research was to answer this question. An experimental program was designed to study the influence of the introduction of short vegetable fibers issued from paper pulp recycling on the SCC's properties. Four types of vegetable fibers have been studied, noted FBA, FBB, FBC and FBD. They differ in their geometric characteristics and their cellulose concentrations. The introduction of the short vegetal fibers in the formulated reference SCC with constant binder dosages led to a significant increase in the paste's demand for water and superplasticizer, a decrease in concrete density, and an augmentation in permeability which reduced its mechanical strength and durability
Essais sur l'Accès à l'Enseignement Supérieur by Benoît Lorel( )

1 edition published in 2010 in English and held by 1 WorldCat member library worldwide

Les choix éducatifs, et notamment celui de l'accession à l'enseignement supérieur, sont le résultat de processus complexes qui font intervenir des instances de décisions variées (individu/collectivité ; parent/enfant ; système éducatif/établissement d'enseignement supérieur et de recherche) qui elles-mêmes se présentent avec des motivations multiples : gains économiques, recherche de bien-être ou de statut sociale, efficacité ou encore justice sociale. Chacune de ces décisions interdépendantes pèsent sur la création, l'allocation et la distribution des ressources dans une société.Notre contribution est ici de mieux comprendre comment les agents interagissement et de déterminer les conséquences de ces interactions
Three Essays on the Economic Analysis of Marketing Pratices on the Internet by Hui Song( )

1 edition published in 2013 in English and held by 1 WorldCat member library worldwide

This paper uses a search model with the product differentiation in a two-sided market. The two-sided market matches sellers with buyers. On the buyers' side it supplies some match information between the goods and the buyers. On the firms' side, it sells some empty slots to the firms. Any firm either takes a place in any platform or stays outside. Buyers search for a good either inside or outside the platform. Each search of the an outside firm is costly and gives the match information between the searcher (buyer) and the seller. We study two cases. In the first case, all buyers obtain the match information in the platform for free. The equilibrium price and profit of an inside firm drops in the number of inside firms. The monopoly platform, by adjusting the entrance fee, admit fewer firms under a higher search cost. If the market has two platforms, they generally admit more firms than the case with one platform. In the second case, the platform is able to impose a fee for all consumers who enter the platform. Our last result has indicated that the platform will register all buyers and firms
Nonlinear Time Series Models with Applications in Macroeconomics and Finance by Songlin Zeng( )

1 edition published in 2013 in English and held by 1 WorldCat member library worldwide

Les trois chapitres suivants examinent: 1) si les taux de change réels d'Asie du Sud-Est sont nonlinéaire, 2) l'inférence bayésienne sur le modèle de série temporelle nonlinéaire avec des applications sur le taux de change réel,et 3) la cyclicité et effet de rebond dans le marché boursier.Depuis la fin des années nonante, les analyses théorique et empirique consacrée au taux de change réel suggèrent que la dynamique pourrait être bien estimés par les modèles non linéaires. Le premier chapitre examine cette possibilité utilisant les données mensuelles de l'ASEAN-5, et il s'étend la recherche existante dans deux directions. Tout d'abord, nous utilisons récemment mis au point des tests de racine unitaire ce qui permettra d'assouplir les modèles non linéaires stationnaires dans le cadre du d'autre alternative que l'couramment utilisés à SETAR ou ESTAR modèle. Deuxièmement, bien que différents modèles nonlinéaires survivre aux tests de mis-spécification, une expérience Monte Carlo à partir de généralisées fonctions de réponse impulsionnelle est utilisé pour comparer leur pertinence relative. Nos résultats i) soutenir l'hypothèse de retour nonlinéaire à la moyenne , et donc la parité de pouvoir d'achat, dans la moitié des cas et ii) indiquent MRLSTAR et ESTAR comme les plus probables processus générant des taux de change réels.Le deuxième chapitre analyse ACR modèle. Nous proposons une approche bayésienne complète d'inférence et une attention particulière est portée sur les paramètres des variables de seuil. Nous discutons le choix des distributions a priori et proposer une chaîne de Markov algorithme de Monte Carlo pour estimer les paramètres et les variables latentes. Une étude de simulation et de l'application à des données taux de change réelles illustrer l'analyse.Le troisième chapitre explore que les différentes formes de recouvrements dans les marchés financiers peuvent présenter dans un modèle de Markov Switching. Elle s'appuie sur les effets de rebond d'abord analysé par Kim, Morley et Piger [2005] dans le cycle des affaires et généralisé par Bec, Bouabdallah et Ferrara [2011] pour permettre une plus souple de type rebond.Nos résultats i) montrer que l'effet de rebond est statistiquement significative et importante dans tous les cas, mais l'Allemagne où la preuve est moins claire et ii) l'impact négatif permanent de marchés baissiers sur l'indice est notablement réduite lorsque le rebond est explicitement pris en compte
Eléments d'assurance de portefeuille et de gestion de long terme by Farid Mkaouar( )

1 edition published in 2010 in French and held by 1 WorldCat member library worldwide

This thesis, which is divided into two parts, deals with two main portfolio management issues: - How to provide guaranteed amounts for a short horizon, especially for a conservative investor? - How to control the inflation risk for long maturities? The main findings include: - The extension of the standard CPPI method in discrete time by analyzing the relationships between the key management parameters. These ones are respectively the multiple, which determines the exposure to market risk and the floor, which determines the guarantee level. - The maximization of the expected utility of a long-term investor in the presence of both stochastic interest and inflation rates, when the financial market is either complete or incomplete. The role of inflation-indexed bonds is especially analyzed
Eléments d'assurance de portefeuille et de gestion de long terme by Farid Mkaouar( Book )

1 edition published in 2009 in French and held by 1 WorldCat member library worldwide

This thesis, which is divided into two parts, deals with two main portfolio management issues: - How to provide guaranteed amounts for a short horizon, especially for a conservative investor? - How to control the inflation risk for long maturities? The main findings include: - The extension of the standard CPPI method in discrete time by analyzing the relationships between the key management parameters. These ones are respectively the multiple, which determines the exposure to market risk and the floor, which determines the guarantee level. - The maximization of the expected utility of a long-term investor in the presence of both stochastic interest and inflation rates, when the financial market is either complete or incomplete. The role of inflation-indexed bonds is especially analyzed
Choix des Portefeuilles Internationaux : diversification, attitude face aux risques et barrières à l'investissement by Maroua Mhiri( )

1 edition published in 2011 in French and held by 1 WorldCat member library worldwide

Modélisation hédonique pour l'évaluation des politiques publiques by Anna Alessandra Michelangeli( Book )

1 edition published in 2005 in French and held by 1 WorldCat member library worldwide

L'impact de la structure de propriété sur la liquidité des titres : étude empirique sur le marché financier Tunisien by Nadia Boujelbene( )

1 edition published in 2011 in French and held by 1 WorldCat member library worldwide

This thesis analyzes the link between corporate governance and liquidity by an empirical validation on a sample of companies listed on the Tunisian stock market. We propose in the first chapter an overview of theoretical models and empirical concept of liquidity. In the second chapter, we are a part, an empirical study on stock liquidity in our sample, performing a descriptive analysis of the microstructure of the Tunisian financial market to highlight the degree of liquidity. In a second step, we study the relationship between liquidity and firm performance. We propose in the third chapter a presentation of models operating the link between liquidity and value firm through the ownership structure. We are also interested in this chapter to the impact of liquidity cost on the performance and value of companies. The contribution of the service cost of immediacy translates into an additional discount on the cost of capital and the value of companies. In the fourth chapter, we conduct a comprehensive study of the influence of the liquidity of Tunisian companies on their performance. In a third step, we study the impact of ownership structure on liquidity. This part includes two chapters. The fifth chapter is devoted to the development of assumptions made in explaining the link between ownership concentration and liquidity. In the sixth chapter, we test our research hypotheses on the influence of the characteristics of the structure of corporate ownership on the stock liquidity
 
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Alternative Names
THEMA

Théorie Economique, Modélisation et Applications facility in Cergy-Pontoise, France

Université de Cergy-Pontoise. Laboratoire THEMA

Languages
French (14)

English (3)