Bayat Baghaee, F., Seifipour, R., Mohammadi,, T., & Mehrabian, A. "Investigating the role of institutional quality in relation to the abundance of natural resources on economic growth in Iran: Kalman filter approach", Journal of Econometric Modelling, 6, 3, 2021, 123–149. doi: 10.22075/jem.2021.23863.1616