This paper aims to examine the relationship between the structural and performance variables in 140 Iranian industries. besides investigating structure of industrial markets according to the Four-firm concentration ratio plus cost advantage ratio (CDR). Then the study estimates efficiency level of the industries under the stochastic frontier technique in 4 digits ISIC code so that fin... https://www.diegojavierfares.com/hot-deal-Baffle-Board-Ceramic-Blanket-Kit-1-Piece-PP2567-special-find/