ارزيابي تاثير درجه تمركز و هزينه هاي تبليغات بر سودآوري در بخش صنعت ايران (رهيافت داده هاي تابلويي پويا)

Concentration, Advertising and Profitability in Iranian Industries: A Dynamic Panel Data Approach

This paper investigates the effect of concentration and advertising on profitability in Iranian Industrial firms, with more than 9 employees. Dynamic panel data technique is used along with the data during the period 1374-1381 to study this issue. The results show that the concentrated industries have a higher profitability than the others, hi addition, advertising has a positive effect on the profit of the Iranian industries.