Download PDF More Formats on IMF eLibrary Order a Print Copy Create Citation This paper sets out the key concepts necessary to calculate trade in value added using input-output tables. We explain the ...

Industrial control systems can be categorized in two types: open-loop and closed-loop systems. The open-loop control system is a continuous control system that provides no feedback from its output.

Earlier work (Sonis and Hewings, 1993, 1995; Sonis, Hewings and Miyazawa 1997a) has explored new ways of examining the structure of regional economies using input-output and social accounting systems.