By means of some simple examples from economics, we elucidatecertain solution tools for the solution of optimal control problems were the system under study undergoes major changes when certain boundaries are crossed. The major changes may be that the state gets a jump discontinuity when...

Security prices contain valuable information that can be used to make a wide variety of economic decisions. To extract this information, a model is required that relates market prices to the desired information, and that ideally can be implemented using timely and low-cost methods. The authors...

In this paper, we study the statistical properties of the moneyness scaling transformation by Leung and Sircar (2015). This transformation adjusts the moneyness coordinate of the implied volatility smile in an attempt to remove the discrepancy between the IV smiles for levered and unlevered ETF...

Seit ihrer Erkenntnis und Formulierung im Rahmen der Ausarbeitung derThermodynamik zeigte sich, dass der Geltungsbereich der sog. Hauptsätzeweit über die Grenzen der Thermodynamik im engeren Sinne herausreicht –sie sind offenbar das Fundament aller materiellen Prozesse. Unverständlichbleibt...

Social network analysis and mining intend to explore for certain, previously unknown, and probably useful relational information from social and information networks. In our case, the research paper is about identifying collaborative networks between the authors (co-authors) of Computer Science...

The preference disaggregation approach to the problem of multicriteria choice is to uncover the inherent model of choice that brings a decision unit to a conclusion in terms of an overall preference on the alternatives. In the context, the actual market shares of a class of competing products...

Der Begriff des "bürgerschaftlichen Engagements" wird in der einschlägigen Fachliteratur und im politischen Diskurs nicht einheitlich verwendet. Einer breiteren Definition folgend verstehen wir darunter "ein freiwilliges, gemeinwohlorientiertes und nicht auf materiellen Gewinn ausgerichtetes...

While significant amounts of foreign aid have been allocated to the group of so-called fragile and conflict-affected states in recent years, it is not clear whether that aid is targeted to where it is most needed. This paper extends recent work by Carment and Samy, and focuses on aid targeting...

Appropriate risk management is crucial to ensure the competitiveness of financial institutions and the stability of the economy. One widely used financial risk measure is Value-at-Risk (VaR). VaR estimates based on linear and parametric models can lead to biased results or even underestimation...

For multivariate nonparametric regression models, existing variable selection methods with penalization require high-dimensional nonparametric approximations in objective functions. When the dimension is high, none of methods with penalization in the literature are readily available. Also,...