Description of control variables
| Control variable | CBs' rating | IBs' rating | Measurement | References |
|---|---|---|---|---|
| Bank type | TYc | TYi | A qualitative variable that takes three modalities
| Thomi (2014) |
| Bank age | AGc | AGi | Age of the Islamic or conventional bank for each year | Arif et al. (2017) |
| Bank size | TAc | TAi | Logarithm of the total assets of Islamic or conventional bank | Rashid et al. (2020) |
| Inflation | INFc | INFi | The inflation rate in the country of origin of the Islamic or conventional bank | Nahar and Sarker (2016) |
| Control variable | CBs' rating | IBs' rating | Measurement | References |
|---|---|---|---|---|
| Bank type | TYc | TYi | A qualitative variable that takes three modalities if the bank is commercial if the bank is investment if the bank is universal | |
| Bank age | AGc | AGi | Age of the Islamic or conventional bank for each year | |
| Bank size | TAc | TAi | Logarithm of the total assets of Islamic or conventional bank | |
| Inflation | INFc | INFi | The inflation rate in the country of origin of the Islamic or conventional bank |
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