Related Parties Transactions and Firm Value: Intermediate Effect of Sustainability Performance

In this study, research was conducted to examine the intermediary role of sustainability in the effect of related party transactions on firm value. The study consists of 163 observations from 23 businesses traded in the BIST 100 index and regularly published sustainability reports between 2015 and 2021. In the study, the Generalized Moments Method, one of the dynamic panel estimation methods, was used. According to the study, related party debts positively affect firm value, while related party sales and purchases negatively affect firm value. In addition, it has been determined that sustainability and sustainable social responsibility activities mediate the relationship between related party transactions and firm value.