We consider the existence of radially symmetric non-negative solutions for the boundary value problem -Au(x) = lf{u(x)) IMI < 1, x e RN{N > 2) u(x) = 0 ||*|| = 1 where X > 0, f(0) < 0 (non-positone), /' > 0 and / is superlinear. We establish existence of non-negative solutions for A small which extends some work of our previous paper on non-positone problems, where we considered the case N = \ ...

Small commercial HVAC systems are notorious for consuming more energy than necessary to properly heat, cool, and dehumidify buildings. Several studies have confirmed poor performance of the equipment. Key findings include failed economizers, cycling fans, refrigeration charge variations, higher unit external static pressure, and reduced air flow rate. These problems result in a reduction in uni...

E xecutive compensation is a topic that has received attention both in the media and the academic literature. This article discusses issues relevant to the construction and interpretation of compensation …gures typically reported in both sources. First, it is not clear what precisely should be included within a measure of the chief executive o¢ cer’s (CEO’s) income tied to his …rm. Second, the ...

The efficient market hypothesis states that the market incorporates all available information to provide an accurate valuation of the asset at any given time. However, most models for forecasting the return or volatility of assets completely disregard the arrival of asset specific news (i.e., news which is directly relevant to the asset). In this paper we propose a simple adaptation to the GARC...

We use experiments to study the efficiency effects for a market as a whole of adding the possibility of forward contracting to a pre-existing spot market. We deal separately with the cases where spot market competition is in quantities and where it is in supply functions. In both cases we compare the effect of adding a contract market with the introduction of an additional competitor, changing ...

In this paper we present a model for the dynamic evolution of the term structure of default-free and defaultable interest rates. The model is set in the Libor market model framework but in contrast to the classical diffusion-driven setup, its dynamics are driven by a time-inhomogeneous Lévy process which allows us to better capture the real-world dynamics of credit spreads. We present necessary...

During the past two decades financial systems world-wide have developed rapidly in terms of size, industry structure, and the range of products and services produced. In Australia the size of the financial system, measured by total assets, has approximately doubled relative to nominal GDP in the past twenty years, while in a number of other countries the growth has been even more dramatic. More...

With the rapid development of the Internet, many retailers and individuals nowadays use this technology to engage in direct e-retailing sales. In this article, we investigate the value of demand-forecast information sharing in a manufacturer-e-retailer supply chain. The value of market information depends not only on its accuracy, but also on the e-retailer’s market power and the product’s Web ...

We study the problem of computing equilibrium prices in a Fisher market with linear utilities and linear single-constraint production units. This setting naturally appears in ad pricing where the sum of the lengths of the displayed ads is constrained not to exceed the available ad space. There are three approaches to solve market equilibrium problems: convex programming, auction-based algorithm...