University of Isfahan International Economics Studies 2008-9643 51 2 2021 10 01 Competition and Market Power in the Manufacturing Industries: A Comparative Study 15 22 26418 10.22108/ies.2020.122212.1080 EN Hadiseh Mohseni 1 PhD student in Economics and Finance, Department of Economics, University of Sistan and Baluchestan, Iran Mosayeb Pahlavani Associate Professor of Economics, Department of Economics, University of Sistan and Baluchestan, Iran Mohhamad Nabi Shahiki Tash Associate Professor of Economics, Department of Economics, University of Sistan and Baluchestan, Iran Seyed Hossein Mirjalili Professor of Economics, Faculty of Economics, Institute for Humanities and Cultural Studies, Iran. Journal Article 2020 03 19 This paper examines the gap between marginal cost and the price of 22 manufacturing industries in Iran at ISIC 2-digit level and 32 industries at a 3-digit level during 1995-2015 compared to selected countries. It examines the gap by using the Hall-Roeger model. We found that in garments, basic chemicals, non-metallic mining, and refined petroleum products, the price and marginal cost difference are high and in tobacco industries are low. In 3 out of 22 industries at ISIC 2- digit level and in 11 out of 32 industries at 3-digit level, Iranian industries have higher markups and a significant gap between price and marginal cost than Japan, Germany, France, and the United Kingdom. Also from 32 industries in ISIC 3-digit level and 22 industries in 2-digit level, Iran has the lowest mark-up in the tobacco industry with 1.03 and in chemical products with 2,33, has the highest markup. <strong>JEL Classification:   , , </strong> https://ies.ui.ac.ir/article_26418_ce9ac6a9eb794020ac68b27483143a9c.pdf