oil prices may be having a direct and indirect effect through the exchange rate on the price of agricultural commodities. in this paper, the impact of world oil prices and exchange rate shocks on prices of specific agricultural commodities including wheat, corn, soybeans and sunflowers in iran is discussed. for this purpose, vector autoregressive model with monthly data over the period 2010-199...

This paper presents a framework for warehousing selected Web contents. In this framework, a hybrid (partially materialized) approach and extended ontologies are used to achieve Web data integration. This hybrid approach makes it possible to integrate DW data with Web-based information resources as they are needed. The Ontologies are used to represent domain knowledge related to Web sources and ...

Data warehouses are large data repositories integrating data from several sources that support decision making. Although, traditionally, data warehouses have been designed using the ‘well-known’ star schema, some design methodologies have come into existence in recent times. These new methodologies have not only focused on logical design: they also propose performing a conceptual modeling using...

In this paper, we show that large inflows into commodity investments, a recent phenomenon known as financialization, has changed the behavior and dependence structure between commodities and the general stock market. The common perception is that the increase in comovements is the result of distressed investors selling both assets during the 2007-2009 financial crisis. We show that financial di...

â â â â  â  abstract â  most debates about the role of tariff cuts on the level of employment and rate of wages in labor market have come out of well-known hecscher – ohlin and stopler – samuelson (hos) theorems. considering the fact that we have divided the workforce into skilled and unskilled labors the present paper assesses the impacts of tariff cuts on labor market indicators in iran. ...