Ali Mohamad  Khorshidi, Ali  Kiamehr, 
    Study the Relationship Between Capital Structure and Product Market Competition in the Tehran Stock Exchange,
    International Business Management,
    Volume 10,Issue 15,
    2016,
    Pages 3136-3140,
    ISSN 1993-5250,
    ibm.2016.3136.3140,
    (https://makhillpublications.co/view-article.php?doi=ibm.2016.3136.3140)
    Abstract: The aim of this study was to investigate the relationship between capital structure is the extent of product market competition in the Tehran Stock Exchange. The 5-year study period the companies listed in Tehran Stock Exchange during 2010-2015 were studied. Between the 90 companies surveyed using multivariable linear regression analysis, the software 17 SPSS the product market competition under two criteria Tobin's Q and Herfindahl Hirschman was measured. The three indicators: growth, debt-size companies was considered as a control variable, the test results indicate that there is a significant relationship between capital structure Tobin's Q index but there is a significant relationship between capital structure and Hirschman index was not confirmed Herfindahl-Hirschman.
    Keywords: herfindahl-hirschman;tobin’s Q;scope of product market competition;Capital structure;growth;leverage;firm size