Tiwari, Aviral Kumar, Faridul Islam, Süleyman Bolat, Phouphet Kyophilavong, and Byoungki Kim. “The Stationary of Productivity Shocks: Evidence from 25 OECD and Big 7 Countries”. International Journal of Economics and Financial Issues 7, no. 1 (February 20, 2017): 613–618. Accessed April 20, 2024. https://econjournals.com/index.php/ijefi/article/view/3781.