Dr. Elijah Lee has both personal experience as a second generation Christian Korean American and has formal research in this area. Here is an excerpt from his article:

The “lost generation” is a term that has been known to describe second-generation Korean Americans, as their immersion within a unique sociocultural context, namely the juxtaposition of the American and Korean culture, can cause confusion toward their construction of self (Kang, 2002; J. Y. Lee, 1995). 

His dissertation study can be found here and the journal article can be found here.