“…Third, regarding the variables used as measures of monetary and fiscal policy actions, the majority of reviewed studies uses money supply, narrowly or broadly defined, as proxy of monetary actions and government expenditure as proxy of fiscal actions. Yet, in some studies, variables like government revenues and/or fiscal deficit are used in combination with or in replacement of government expenditure to proxy fiscal policy actions (s ee for instance , Ali et al 2008 ; Iyeli et al 2012 ; Şen and Kaya 2015 ; Abu Hasan et al 2016 ; Usman and ul-Haq 2016 ; Richard et al 2018 ; Tarawalie and Kargbo 2020 ). Similarly, some studies add various measures of monetary policy, such as interest rate, exchange rate, inflation, and foreign reserves, in combination with or in replacement of money supply to proxy monetary actions ( see for instance , Rahman 2005 ; Hussain 2014 ; Şen and Kaya 2015 ; Usman and ul-Haq 2016 ; Richard et al 2018 ; Özer and Karagöl, 2018 ; Tarawalie and Kargbo 2020 ).…”