Studying the Effect of Industry Type on the Relationships between Corporate Governance and Companies Productivity

The subject of this thesis is "Studying the Effect of Industry Type on the Relationships between Corporate Governance and Companies Productivity ".In this study the relationship between the type of industry activity and corporate governance and productivity with and without control variables were discussed. The territorial scope of the research includes the registered companies in the Tehran Stock Exchange. Moreover, the time of the study of the companies refers to the period from 2003 to 2012.The research included an independent variable (type of industry), and two dependent variables (productivity and corporate governance) and the control variables. In the first hypothesis the relationship between ownership concentration and total productivity and in the second hypothesis, the connection between the board of directors size (board size) and total productivity and finally, in the third hypothesis the relation between the type of industry activity and productivity were included in the research model and their significance was examined.
The result showed that there was a significant negative relation between ownership concentration and productivity, a significant positive relation between the board size and total factor productivity and a significant negative relation between the type of industrial activity and productivity.