These are the studies on this topic that I have published and presented at various conferences:
Kim, S. (2017). A survey on postsecondary Korean language programs in the United States. Journal of the National Council of Less Commonly Taught Languages, 21, 99-126. link
Kim, S., & Yoon, H.-J. (2016). Stop using that: Expressing definiteness in Korean. MSU Working Papers in Second Language Studies, 7, 44-56. link
Kim, S. (2018, March). Capital, Ideology, and Value Creation: A case study of an American learner of Korean. Paper presented at the American Association for Applied Linguistics (AAAL) conference, Chicago, Illinois, USA.
Kim, S., & Park, O.-S. (2016, October). Validation of a Korean Speaking Proficiency Assessment. Poster presented at the Midwest Association of Language Testers (MwALT) conference, West Lafayette, Indiana, USA.