the main objective of this paper is to evaluate the effect of r&d on profitability of high -tech industries with new evidence from the iranian industries carrying four- digit codes. the structure- conduct- performance (scp) paradigm, which is relatively well known in industrial economics and in organization management, provides the theoretical construct that guides our empirical model formu...

We describe the economics literature on auction markets, with an emphasis on the connection between theory, empirical practice, and public policy, and a discussion of outstanding issues. We describe some basic concepts, to highlight some strengths and weaknesses of the literature, and so indicate where further research may be warranted. We discuss identi…cation and estimation issues, with an em...

During 21st century, manufacturing success and survival are becoming more difficult to ensure this fact is originated in the emergency of new business era that has "change" as one of its major characteristics. Change in business environment and uncertainly have entered management study and research for the last two decades. Agility enhances the organization ability to provide high quality produ...