23 citations · 81 across the 12 of their papers we have counts for
5 papers · 1 filter
On indication, strict monotonicity, and efficiency of projections in a general class of path-based data envelopment models
Margaréta Halická, Mária Trnovská, Aleš Černý
Data envelopment analysis (DEA) theory formulates a number of desirable properties that DEA models should satisfy. Among these, indication, strict monotonicity, and strong efficien…
A unified approach to radial, hyperbolic, and directional efficiency measurement in Data Envelopment Analysis
Margaréta Halická, Mária Trnovská, Aleš Černý
The paper analyses properties of a large class of "path-based" Data Envelopment Analysis models through a unifying general scheme. The scheme includes the well-known oriented radia…
Numeraire-invariant quadratic hedging and mean--variance portfolio allocation
Aleš Černý, Christoph Czichowsky, Jan Kallsen
The paper investigates quadratic hedging in a semimartingale market that does not necessarily contain a risk-free asset. An equivalence result for hedging with and without numerair…
Convex duality and Orlicz spaces in expected utility maximization
Sara Biagini, Aleš Černý
In this paper we report further progress towards a complete theory of state-independent expected utility maximization with semimartingale price processes for arbitrary utility func…
A Singular Differential Equation Stemming from an Optimal Control Problem in Financial Economics
Pavol Brunovský, Aleš Černý, Michael Winkler
We consider the ordinary differential equation , with , and the singular initial condition …