In literature, there is a set of related definitions of currency substitution such as external liability currency substitution, domestic liability currency substitution, banking sector's liability currency substitution or deposit currency substitution, and credit dollarization. External liability currency substitution measures total external debt (private and public) denominated in foreign currencies of the economy. Deposit currency substitution can be measured as the share of foreign currency deposits in the total deposits of the banking system, and credit currency substitution can be measured as the share of dollar credit in the total credit of the banking system.