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Volume 1 (1995)
Evaluation of Technological Change and its Impact on the Combination of Input and Scale of Production in Iranian Manufacturing Industries

Mohammad Nabi Shahiki Tash; Javad Taherpoor; Ali Nourozi

Volume 21, Issue 67 , July 2016, , Pages 143-179

https://doi.org/10.22054/ijer.2016.7239

Abstract
  In this study, by employing a flexible cost function we calculate the technological change measure and total factor productivity and examine the impact of technology on the combination of input and scale of production in Iranian manufacturing industries. According to the results of technological change ...  Read More

The Relationship among Profitability Index, Concentration Ratio, and Economies of Scale in Iranian Manufacturing Industries

Mohamad Nabi Shahiki Tash; Farhad Khodad Kashi; Ali Norouzi

Volume 19, Issue 59 , July 2014, , Pages 39-71

Abstract
  In this study the market structure of industrial sector has been evaluated based on the index of economies of scale, Herfindahl – Hirschman concentration index, and Lerner concentration index. Also, the relationship among profitability index and indexes of concentration ratio and economies of scale ...  Read More

Estimating the Parameters of Inter-industry Variability Function of Profit Margins and Evaluating the Degree of Concentration in the Iranian Manufacturing Industries Based on the U-Davies Approach

Mohammad Nabi Shahiki Tash; Ali Norouzi

Volume 19, Issue 58 , April 2014, , Pages 39-76

Abstract
  The objective of this paper is to estimate and analyze market power and degree of concentration in Iran's Manufacturing industries. The paper employs Inter-industry Variability function of profit margin approach and U-Davies in order to evaluate degree of industrial concentration. The finding indicates ...  Read More