Ekeland, Ivar

Elements d'economie mathematique by Ivar Ekeland ( Book )
4 editions published between 1979 and 1983 in French and Russian and held by 83 libraries worldwide

Zufall, Glück und Chaos : mathematische Expeditionen by Ivar Ekeland ( Book )
7 editions published between 1991 and 1996 in 3 languages and held by 53 libraries worldwide

Das Vorhersehbare und das Unvorhersehbare : die Bedeutung der Zeit von der Himmelsmechanik bis zur Katastrophentheorie by Ivar Ekeland ( Book )
1 edition published in 1985 in German and held by 44 libraries worldwide

Le calcul, l'imprevu : les figures du temps de Kepler a Thom by Ivar Ekeland ( Book )
10 editions published between 1984 and 2001 in 3 languages and held by 44 libraries worldwide

Applied nonlinear analysis by Jean-Pierre Aubin ( Book )
8 editions published between 1984 and 1988 in 3 languages and held by 35 libraries worldwide

Convexity methods in hamiltonian mechanics by Ivar Ekeland ( Book )
4 editions published in 1990 in English and Undetermined and held by 24 libraries worldwide

Identification and estimation of hedonic models by Ivar Ekeland ( Book )
6 editions published in 2003 in English and No Linguistic content and held by 17 libraries worldwide
This paper considers the identification and estimation of hedonic models. We establish that in an additive version of the hedonic model, technology and preferences are generically identified up to affine transformations from data on demand and supply in a single hedonic market. For a very general parametric structure preferences and technology are fully identified. This is true under a strong assumption of statistical independence of the error term. It is also true under the weaker assumption of mean independence of the error term. Much of the confusion in the empircial literature that claims that hedonic models estimated on data from a single market are fundamentally underidentified is based on linearizations that do not use all of the information in the model. The exact economic model that justifies widely used linear approximations has strange properties so the approximation is doubly poor. A semiparametric estimation method is proposed that is valid when a statistical independence assumption is valid. Alternatively, under the weaker condition of mean independence instrumental variables estimators can be applied to identify technology and preference parameters from a single market. They are justified by nonlinearities that are generic features of equilibrium in hedonic models.

Paris-Princeton lectures on mathematical finance 2004 ( Book )
1 edition published in 2007 in English and held by 14 libraries worldwide

Convex analysis and variational problems by Ivar Ekeland ( Book )
7 editions published between 1974 and 1999 in 4 languages and held by 13 libraries worldwide

Mathematical techniques of optimization, control and decision ( Book )
2 editions published between 1981 and 1982 in English and held by 11 libraries worldwide