“…The most used theory during the period of 2002-2020 is the agency theory, which is used in 65% of this review study. Agency theory has been adopted in 52 studies which are quantitative in nature, linking it with firm performance [28,47,67,94,118,130,138] typically the researcher tried to link it with confit of interest hypothesis which arises due to separation of ownership and control [43,72]. Additionally, the agency theory has been applied to the topics of earnings management [19,42,63,73,75,89,107] and financial reporting quality [119,129] to check the board of directors monitoring and controlling role over the companies' management.…”