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Littérature scientifique sur le sujet « Crédit – Gestion – Modèles mathématiques »
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Articles de revues sur le sujet "Crédit – Gestion – Modèles mathématiques"
ELSEN, J. M. « La gestion des populations : De l’optimisation au progrès génétique réalisé dans les schémas de sélection ». INRAE Productions Animales 5, HS (2 décembre 1992) : 237–42. http://dx.doi.org/10.20870/productions-animales.1992.5.hs.4297.
Texte intégralGHADHAB, Wassim, et Kamel NAOUI. « Stress test micro-prudentiel inversé comme outil de gestion du risque du crédit ». Journal of Academic Finance 15, no 1 (30 juin 2024) : 108–22. http://dx.doi.org/10.59051/joaf.v15i1.768.
Texte intégralDupont, J., J. Smitz, A. N. Rousseau, A. Mailhot et G. Gangbazo. « Utilisation des outils numériques d'aide à la décision pour la gestion de l'eau ». Revue des sciences de l'eau 11 (12 avril 2005) : 5–18. http://dx.doi.org/10.7202/705326ar.
Texte intégralBalafrej, Mohammed, Abdelatif Sahnoun et Mohamed Sadik. « Comparaison des modèles mathématiques non linéaires et détermination du modèle qui décrit au mieux la croissance de la race Sardi ». Revue d’élevage et de médecine vétérinaire des pays tropicaux 73, no 4 (25 novembre 2020) : 255–61. http://dx.doi.org/10.19182/remvt.31945.
Texte intégralBanton, O., S. Jordana et M. Larocque. « Simplification rationnelle des outils hydrologiques de gestion : recommandations méthodologiques pour la construction de modèles semi-empiriques à origine mécaniste ». Revue des sciences de l'eau 9, no 2 (12 avril 2005) : 147–61. http://dx.doi.org/10.7202/705246ar.
Texte intégralDuchemin, Marc, Marius Lachance, Guy Morin et Robert Lagacé. « Approche géomatique pour simuler l'érosion hydrique et le transport des sédiments à l'échelle des petits bassins versants ». Water Quality Research Journal 36, no 3 (1 août 2001) : 435–73. http://dx.doi.org/10.2166/wqrj.2001.026.
Texte intégralNgbolua, K. N. « Etudes ethnobotanique et dendrométrique et potentiel de séquestration du C02 de Entandrophragma cylindricum et Khaya grandifoliola (Meliaceae) dans une réserve communautaire en République Démocratique du Congo ». Revue Congolaise des Sciences & ; Technologies 01, no 02 (15 novembre 2022) : 95–109. http://dx.doi.org/10.59228/rcst.022.v1.i2.13.
Texte intégralOuld Mohamed Yahya, Ahmed, Abdel Kader Ould Mahmoud et Issakha Youm. « Modélisation d’un système de stockage intégré dans un système hybride (PV / Eolien / Diesel) ». Journal of Renewable Energies 10, no 2 (12 novembre 2023). http://dx.doi.org/10.54966/jreen.v10i2.783.
Texte intégralLivshits, Veniamin. « Mathematical methods used in the field of transport policy in the Soviet Union and in the CIS ». Les Cahiers Scientifiques du Transport - Scientific Papers in Transportation 27 | 1993 (31 mars 1993). http://dx.doi.org/10.46298/cst.11929.
Texte intégralThèses sur le sujet "Crédit – Gestion – Modèles mathématiques"
Fakih, Houssam. « Développement et essais de modélisation du risque de crédit ». Université Robert Schuman (Strasbourg) (1971-2008), 2002. http://www.theses.fr/2002STR30002.
Texte intégralIn recent years, enonnous strides have been made in the art and science of credit risk measurement and management. The main reason for this change has resulted in dissatisfaction with traditional approaches to credit risk measurement and with the current regulatory model. The new models of credit risk seek to offer alternative "internal model" approaches to measuring the credit risk of a loan or a portfolio of loans. The thesis provides the motivation for the recent growth of the new credit risk models. It briefly overviews traditional models of risky debt evaluation and examines tbe approaches of tbe new internal models. This thesis presents also two essays on credit risk. Ln the first essay, Networth-to-asset ratio is identified as a primary index for default process modeling. The default condition is defined when the ratio becomes negative the first time. A mean-reverting dynamic model for the default process is justified by using tbeory of optimal capital structure. A discrete time trinomial Markov chain model is developed. A matrix method is given to numerically approximate the default risk in a specific future period. The second essay develops a default risk model that matches the initial default risky term structure, allowing for state dependent default probability and stochastic recovery rate. The default time is modeled as the first jump of a Poisson type process, with time and default-free rate dependent jump intensity. It develops a forward induction algorithm for matching the initial credit yield spread
Gagnon-April, Jérôme. « Trois essais sur les banques et le pouvoir de marché ». Doctoral thesis, Université Laval, 2016. http://hdl.handle.net/20.500.11794/26944.
Texte intégralThis thesis looks at the role of power market in banking. Emphasis is put on risk taking, economies of scale, economic efficiency and shocks transmission. Chapter 1 presents a dynamic stochastic general equilibrium model with monopolistically competitive banks à la Salop (1979). Following Krugman (1979, 1980) hypothesis about the link between economies of scale and exports, banks have to support a transaction cost on foreign trades that decreases with the size of their local assets (loans). This lead the banks to increase their local loans by reducing their margin. The model is solved and simulated under various degrees of market power in the banking system. Results show that two forces, economies of scale and market power, oppose to each other when the market concentrates. Concentration also leads foreign activities to increase, which makes banks more sensible to foreign shocks. Chapter 2 takes the same basic framework, but where banks face credit risk partially insured by collateral pledged by entrepreneurs and can limit this risk via costly effort. The model is solved and simulated under various degrees of market power in the banking system. We find that higher market power reduces the size of the financial market and steady-state production, but leads to safer banks. In addition, economies with highly concentrated banking systems experience milder fluctuations following most types of shocks, because the higher margins associated with market power serve as a buffer to cushion the economy from adverse shocks, at least initially. This buffer effect is eliminated once we allow for free entry into the banking sector. An other extension with economies of scale shows that a moderately concentrated market can be optimal for the economy. Chapter 3 uses a Mean-Variance portfolio analysis to depict a bank with market power. Return on deposits and assets varies with the quantity traded, which change the bank’s portfolio. Market power on assets lead the bank to choose a more stable portfolio, even if it causes the return to decrease. Similar results occur in the case of deposits, but variance increase for higher degrees of market power. Results are robust for a variety of demand functions.
Saurin, Sébastien. « Advanced credit risk analytics : Fairness, interpretability, homogeneity ». Electronic Thesis or Diss., Orléans, 2024. http://www.theses.fr/2024ORLE1092.
Texte intégralThis thesis proposes innovative solutions to address the challenges posed by the use of artificial intelligence (AI) and machine learning (ML) in credit scoring. AI is revolutionizing the world at an unprecedented pace, redefining entire industries and exerting a profound influence on employees, managers, customers, suppliers, and regulators. In finance, and particularly in the credit market, ML models directly influence crucial decisions such as credit granting and the determination of regulatory capital. Although ML algorithms exhibit better predictive performance than traditional models, their use raises significant concerns regarding fairness, transparency, and regulatory compliance. To address the challenges posed by these rapidly expanding technologies, this thesis is structured around three main dimensions that tackle issues of fairness, interpretability, and homogeneity in credit scoring models. The first chapter introduces a theoretical framework to test for the fairness of credit scoring models, identify the variables that generate the lack of fairness, if any, and mitigate it, all while maintaining the model’s predictive performance. The second chapter proposes an innovative methodology called XPER, which decomposes model performance into specific contributions from each variable, thereby enhancing the interpretability of credit scoring models. Finally, the third chapter introduces the Risk Homogeneity Coefficient (RHC), a tool that quantifies the degree of homogeneity within risk grades, or risk classes, in the Internal Ratings-Based approach for credit risk, as required by the Basel accords. These approaches, while technical, are also very practical and provide innovative tools enabling financial institutions and their regulators to validate credit scoring models while considering issues of fairness, interpretability, and homogeneity
Gueye, Djibril. « Some contributions to financial risk management ». Thesis, Strasbourg, 2021. http://www.theses.fr/2021STRAD027.
Texte intégralThis thesis deals with various issues related to quantitative management of financial risks. We are interested, in a first part, in the models of default time in credit risk within the framework of enlargement of filtrations theory. We propose models where the default time can coincide with some instants of economic shocks. We first extend the model of Jiao and Li (2018) in the case where the shocks are not predictable by studying the characteristics of the default time. Secondly, we present the generalized Cox model which is an extension of Lando's (see Lando, 1998). We offer a wide range of examples to ulistate our construction. The second part deals with the construction of volatility surfaces of financial assets under the condition of no arbitrage opportunity (AOA) using kriging methodologies (or Gaussian process regression). Our approach consists in learning kriging on European option prices by taking into account non-arbitrage conditions. These conditions are characterized by shape constraints on prices, namely monotonicity in the direction of maturities and convexity in the direction of strikes. Since these constraints correspond to a finite number of linear inequalities, we adopt a kriging technique under constraints of linear inequalities. For this, we use the method developed by Maatouk and Bay (2016) which is based on the finite-dimensional approximation of the Gaussian process. The Monte Carlo Hamiltonian algorithm of Pakman and Paninski (2014) will be used to simulate the Gaussian coefficients. We propose a method for calculating the Maximum a Posteriori (MAP) of the Gaussian process. We compare our method with those of constrained neural networks and SSVIs
Guo, Liang. « Facteurs macroéconomiques et risque de crédit ». Paris 10, 2010. http://www.theses.fr/2010PA100024.
Texte intégralThe objective of this thesis is to study the impact of macroeconomic factors on credit risk. In this thesis, we use two types of models which allow us to exploit a great number of series. The first model refers to the Global VAR model (GVAR), developed by Pesaran and al. (2004). With the GVAR model, we consider a fictitious portfolio of 83 firms which cover 16 developed countries. We find that default rates increase significantly during the recession but do not drop so much during the expansion. In addition, we confirm the fact that the firms of good credit quality are less sensitive to the variations of the economic condition than those of poor quality. The second model is the dynamic factor model (FAVAR type, Factor augmented vector autoregression model), proposed by Stock and Watson (2005). We have two empirical applications, respectively in United States and in the Euro area. We find the common factors explain slightly the firms’ default rates. This reultat shows a great advantage of the diversification strategy. Moreover, we find that the factor the most explanatory for the default rate is the one related to real activity, such as production and employment. Another important explanatory factor, is the one associated to stock indexes. Finally, we find that the contribution of the interest rate shock to default rates remains limited. The subprime crisis is thus not caused by the changement of federal fund rates
Elouerkhaoui, Youssef. « Etude des problèmes de corrélation et d'incomplétude dans les marchés de crédit ». Paris 9, 2006. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=2006PA090007.
Texte intégralGauthier, Claire. « Trois essais empiriques sur le risque de crédit : Modèles intensité, modèle multifactoriel, valeurs extrêmes ». Nice, 2002. http://www.theses.fr/2002NICE0061.
Texte intégralCredit risk materializes by a firm default, and by the spread movements following a decrease of an issuer's credit quality. In the first chapter of this thesis, an intensity model considering default as an unpredictable event is implemented. The second chapter presents a multifactor models for credit spreads, based on a wide range of explanatory variables, and using panel data econometry to build theoretical credit spreads. This model is a good tool to analyse and forecast credit spreads. The third chapter underlines the non normality of credit spreads distributions, and characterize their distribution using extreme value theory
Deschamps, Jean-Christophe. « Gestion hiérarchisée de cellules flexibles d'assemblage : concepts, modèles et simulation¨ ». Toulouse 3, 1994. http://www.theses.fr/1994TOU30269.
Texte intégralZargari, Behnaz. « Le risque de crédit et les produits dérivés de crédit : modélisation mathématique et numérique ». Thesis, Evry-Val d'Essonne, 2011. http://www.theses.fr/2011EVRY0004.
Texte intégralThis thesis deals with credit derivatives modeling and consists of two parts: The first part concerns the density model, recently proposed by El Karoui et al., where the standing assumption is that the conditional law of default time given the reference filtration is equivalent to its (non-conditional) law. Under this assumption, we provide alternative (and simpler) proofs for some existing results in the theory of initial and progressive enlargement of filtrations. Also, we present some new results such as the predictable representation theorem for progressively enlarged filtration in the multidimensional case. We then propose several methods to construct density models, in both one-dimensional and multidimensional cases. Finally, we show that the density model is an efficient approach for dynamic hedging of multi-name credit derivatives. In the second part, a Markov model is constructed for studying the counterparty risk in a CDS contract. The wrong-way risk in this model is accounted for by the possibility of the simultaneous default of the reference name and of the counterparty. We start by considering a Markov chain model of two reference credits, the firm underlying the CDS and the protection seller in the CDS. In this set-up, we have semi-explicit formulae for most quantities of interest with regard to CDS counterparty risk like price, CVA, EPE or hedging strategies. We then generalize this framework to account for the spread risk by introducing stochastic factors, so that, we deal with a Markov copula model with stochastic intensities. We also address the issue of dynamically hedging the CVA with a CDS written on the counterparty. For model implementation, we consider three different affine specification of the intensities, which in view of the dynamic copula property of the model, make calibration very efficient. Numerical results are presented to show the adequacy of the behavior of CVA in the model with stylized features
Straub, Stéphane. « Essays on incentives, institutions and development ». Toulouse 1, 2002. http://www.theses.fr/2002TOU10076.
Texte intégralIn the first chapter,we model the boundaries of the multinational firm by looking at a simple trade-off between FDI (internal expansion with strong control rights) and transfer of technology (arm's length expansion without control rights). We analyze the effects of contractual incompleteness due to problems of commitment in host countries, and introduce the possibility of corruption due to informational asymmetry. The model predicts that firms will prefer FDI the weaker the ability to commit of the host country, while more corruption will shift the trade-off toward arm's length expansion. Cross-country and panel empirical evidence supports these conclusions. In the second chapter, we build a regulation model in which renegotiation occurs due to the imperfect enforcement of concession contracts. We provide theoretical predictions for the impact, on the probability of renegotiation of a concession, of regulatory institutions, institutional features, economic shocks and of the characteristics of the concession contracts. We use a data set of nearly 1000 concessions awarded in Latin America from 1982 to 2000, covering the sectors of telecommunications, energy, transport and water, to test these predictions. Finally, we derive some policy implications of our theoretical and empirical work. Third chapter use a model of firms'choice between formality and informality. Complying with costly registration procedures allows the firms to benefit from key public goods, property rights and contracts enforcement, that enable the participation in the formal credit market. In a moral hazard framework with credit rationing, their decision is shaped by the interaction between the cost of entry into formality and the relative efficiency of formal or informal credit mechanisms. Testing the model with a firm-level data set, of 5985 firms in 48 countries, we find that both individual characteristics of the firms and country-level aspects matter in a way consistent with the theory
Livres sur le sujet "Crédit – Gestion – Modèles mathématiques"
Ross, André. Modèles mathématiques en gestion. Sainte-Foy : Le Griffon d'argile, 1987.
Trouver le texte intégralBelletante, Bernard. Mathématiques et gestion : Les outils fondamentaux. Paris : Ellipses, 1991.
Trouver le texte intégralVédrine, Jean-Pierre. Techniques quantitatives de gestion. Paris : Librairie Vuibert, 1985.
Trouver le texte intégralWidmer, Marino. Modèles mathématiques pour une gestion efficace des ateliers flexibles. Lausanne : Presses polytechniques et universitaires romandes, 1991.
Trouver le texte intégralHamon, Jacques. Bourse et gestion de portefeuille. Paris : Economica, 2004.
Trouver le texte intégralHamon, Jacques. Bourse et gestion de portefeuille. 2e éd. Paris : Economica, 2005.
Trouver le texte intégralBouchaud, Jean-Philippe. Théorie des risques financiers : Portefeuilles, options et risques majeurs. Paris : Commissariat à l'énergie atomique, 1997.
Trouver le texte intégralMoore, Jeffrey H. Decision modeling with Microsoft Excel. 6e éd. Upper Saddle River, N.J : Prentice Hall, 2001.
Trouver le texte intégralCrête, Michel. Les modèles d'indice de qualité de l'habitat : Des outils utiles pour la gestion de l'habitat de la faune forestière ? Québec : Société de la faune et des parcs du Québec, 2003.
Trouver le texte intégralR, Anderson David. Study guide to accompany quantitative methods for business. 4e éd. St. Paul, Ind : West Pub., 1989.
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