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Möglichkeiten und Grenzen der partiellen Rangdatenanalyse in der sozialwissenschaftlichen Forschung: Untersuchungen zu sozialen Netzwerken und Hilfeleistungen

Pihl, Christian; Pötter, Ulrich - 2010

Pflegebedürfnisse werden zum erheblichen Teil durch professionelle Dienste befriedigt. Ein wichtiger Eckpfeiler in der pflegerischen Versorgung stellen darüber hinausfamiliäre Beziehungen wie Partner und Kinder, sowie Freundes- und Nachbarschaftsnetzwerke dar. Diese Ressourcen stehen aber...

Persistent link: https://www.econbiz.de/10011600945

On the Extreme Points of Two Polytopes associated with a Digraph and Applications to Cooperative Games

van den Brink, René; van der Laan, Gerard; Vasil'ev, Valeri - 2004

polytope is the set of all sharing vectors (elements from the unit simplex) such that each node gets at least as much as each …

Persistent link: https://www.econbiz.de/10010325211

The equivalence of convex and concave transport cost in a circular spatial model with and without zoning

Hamoudi, Hamid; Rodríguez Iglesias, Isabel María; … - In: Estudios de Economía 42 (2015) 1, pp. 5-20

This article depicts a location game in a circular market. The equivalence results between a convex and a concave transport cost are reexamined by assuming an arbitrary length. In contrast to previous research the solution found shows that the equivalence relationship depends on the space...

Persistent link: https://www.econbiz.de/10011538762

A Ricardian model of the tragedy of the commons

lasserre, Pierre; Soubeyran, Antoine - 2001

This paper revisits the tragedy of the commons when agents have different capabilities in both production and encroachment activities, and can allocate their time between them. Under fairly general assumptions on production and encroachment technologies, an individual's expected income is convex...

Persistent link: https://www.econbiz.de/10011608842

General properties of rational stock-market fluctuations

Mele, Antonio - 2004

Which pricing kernel restrictions are needed to make low dimensional Markov models consistent with given sets of predictions on aggregate stock-market fluctuations? This paper develops theoretical test conditions addressing this and related reverse engineering issues arising within a fairly...

Persistent link: https://www.econbiz.de/10010293722

Estimating a convex function in nonparametric regression

Dette, Holger; Birke, Melanie - 2005

equivalent to the initial unconstrained estimate if the regression function is in fact convex. If convexity is not present the …

Persistent link: https://www.econbiz.de/10010296683

Shape constrained estimators in inverse regression models with convolution-type operator

Birke, Melanie; Bissantz, Nicolai - 2007

In this paper we are concerned with shape restricted estimation in inverse regression problems with convolution-type operator. We use increasing rearrangements to compute increasingand convex estimates from an (in principle arbitrary) unconstrained estimate of the unknown regression function. An...

Persistent link: https://www.econbiz.de/10010298216

Notes on convexity and quanto adjustments for interest rates and related options

Boenkost, Wolfram; Schmidt, Wolfgang M. - 2003

We collect simple and pragmatic exact formulae for the convexity adjustment of irregular interest rate cash flows as … derive an additional new convexity adjustment for the volatility to be used in a standard Black & Scholes model. We study the …

Persistent link: https://www.econbiz.de/10010298886

Shape constrained kernel density estimation

Birke, Melanie - 2008

In this paper, a method for estimating monotone, convex and log-concave densities is proposed. The estimation procedure consists of an unconstrained kernel estimator which is modi?ed in a second step with respect to the desired shape constraint by using monotone rearrangements. It is shown that...

Persistent link: https://www.econbiz.de/10010300696

Conditional nonparametric frontier models for convex and non convex technologies: A unifying approach

Daraio, Cinzia; Simar, Leopold - 2005

conditional order-m frontiers without any convexity assumption on the technology. On the one hand, convexity has always been … convexity assumption can be reasonable and sometimes natural. Leading by these considerations, in this paper we propose a … measures of efficiency provide also indicators of convexity. Illustrations through simulated and real data (mutual funds …

Persistent link: https://www.econbiz.de/10010328648