How insightful could this possibly be if socioeconomic variables are not control...

bllguo 7 months ago | parent | context | favorite | on: U.S. math scores drop on major international test

How insightful could this possibly be if socioeconomic variables are not controlled for? Clearly the socioeconomic makeup of "US Asians" is not the same as, say, the entire population of Korean students.

Also, "US Asians" is a silly grouping..