We conduct an event analysis on OPEC quota announcements to determine their impact on the stock returns in the oil industry. We find that announcements to reduce the quota are followed by positive excess returns over pre-announcement levels, announcements of no action are met with negative excess returns and announcements to increase the quota have no significant impact on stock market returns....

This study investigates a supply chain of perishable fruits and vegetables. A simulation model using system dynamics approach is proposed to study the behaviors and relationships within the supply chain and to determine the impact of the supply, demand and price interactions. The proposed model yields an insight into the overall agricultural system, taking into account the influence of import q...

The marine diatom Thalassiosira weissflogii (Grun.) Fryxell et Hasle was grown over a wide range of irradiances and temperatures in both NO3 and NH4-amended seawater containing high Fe. Maximum growth rates were not affected by N source, but the initial slope of the growth irradiance curve was significantly greater for the NH4-grown cells. Light-limited phytoplankton contained 4 times more Fe (...

This paper constructs a model of the recorded music market to investigate the consequences of local content requirements in broadcasting for the ‘internationalization’ of domestic music. We model the entry decisions of bands, the contracting decisions of record companies, the airplay decisions of radio stations and the radio listening and recording purchasing decisions of consumers. We show tha...

We propose a new method of the Single Transferable Vote (STV) and give a unified way to describe classic procedures (Gregory Method, Inclusive Gregory Method and Weighted Inclusive Gregory Method) as an iterative procedure. A modification for quota definition is proposed which improves theoretical properties of the procedures. The method is justified by a new set of axioms. It is shown that thi...