Byun Soo-yong [Pyŏn Suyŏng] & Lee Sungkyun [Li Sŏngkun]. (2021). Pumo ŭi sahoechŏk chiwuiwa cha’nyŏ ŭi kyoyuk kyŏlgwa: Han’guk esŏ kyoyuk pulp’yŏngdŭng’ŭn simhwa doeŏknŭnka? 부모의 사회경제적 지위와 자녀의 교육결과: 한국에서 교육불평등은 심화되었는가? [Parental socioeconomic status and children’s educational outcomes: Has educational inequality increased in Korea?]. Seoul: Pak’yŏngstory.
Kim ChangHwan [Kim Ch’anghwan] & Byun Soo-yong [Pyŏn Suyŏng]. (2021). Kyoyuk premium: Han’guk esŏ daehak kyoyuk ŭi nodong sichang kachinŭn harakhaetnŭnka? 교육 프리미엄: 한국에서 대학교육의 노동시장 가치는 하락했는가? [Educational premium: Has the labor market value of college education decreased in Korea?]. Seoul: Pak’yŏngstory.