“…Some of them explore the effectiveness of PWYW and its implications for sellers' earnings (Chen et al, 2017; Gneezy et al, 2010; Kim et al, 2009). Others examine the factors that influence customers’ payments, including external reference prices (Kim et al, 2014; Narwal & Nayak, 2020), internal reference prices (Roy et al, 2016; Roy et al, 2021), social preferences (Schmidt et al, 2015), the timing of payment (KC et al, 2023; Viglia et al, 2019), gender (Santana & Morwitz, 2021), and music (Roy & Das, 2022).…”