“…Compared to existing studies that have analyzed specific roll call votes (e.g. Kim et al, 2013;Kim et al, 2020aKim et al, , 2020bLee, 2005;Lee and Lee, 2011), a distinguishable feature of this study is our analysis of all roll call votes from the 20th Korean National Assembly (Jeon, 2006;Lee and Lee, 2015). Considering that party disloyalty does not only appear in conflicting situations between political parties, using all roll call votes to measure MPs' party loyalty and responsiveness to voters is advantageous as it is free from the sample selection bias (VanDoren, 1990).…”