(PSTR) Investigating the Nonlinear Impact of Financial Development Index on the Development of the Industrial Sector in Islamic Countries Gentle Panel Transition Regression (PSTR)

The present paper is one of the newest models of econometric approaches called PSTR model in order to investigate the effect of nonlinear effect of financial development indicators on industrial sector growth in order to try to find an answer to solve the problem and practical problem of non-linear effect of financial development indicators on industrial sector growth. The member countries of the Islamic Conference have been used to explain during the period 2005-2019. The findings indicate that there is a nonlinear relationship between the variables under study. Based on the obtained results, the threshold for the member countries of the Islamic Conference of the slope parameter, which indicates the speed of adjustment from one regime to another, is equal to 21.0188 and the place of regime change is estimated to be 10.586. The results obtained by the PSTR model indicate that the financial development index (ratio of banks' domestic credits to GDP) in both regimes has had a different effect on the increased growth of the industrial sector. Of course, by crossing the threshold and entering the second regime, the intensity of the negative impact of financial development on the increased growth of the industrial sector disappears and becomes positive. Clearly, this result indicates an asymmetric relationship between the financial development index and the increased growth of the industrial sector at different levels of the financial development index.