The fundamental input-output identities that express the solution for commodity output and price also guarantee that nominal GDP is the same whether measured as the sum of final demand expenditures or as the sum of value added. In the simplified framework in which the identities are usually presented, all relationships hold exactly, and there is one homogenous price for each commodity. However,...

ActiveCube is a bi-directional user interface that supports a person's creative work through constructing and interacting with 3-D virtual objects by using actual physical cubes. With this flexible interface, the user can easily construct various 3-D structures in a virtual environment by simply combining the cubes. All of the faces of the cubes are the same and can be connected to any face of ...

the aim this research is the diagnosis of production chains in oil’s regions of iran. for this reason, by using, input-output table for oil’s regions of iran,linkages and production chains are identified. the results of research indicate that although oil and natural gas sectors contain 50 percent of region’s output, but it is not a leading sector. in contrast, manufacturing of species of machi...