RT Journal Article SR Electronic T1 Using Achievement Tests to Measure Language Assimilation and Language Bias among the Children of Immigrants JF Journal of Human Resources JO J Hum Resour FD University of Wisconsin Press SP 647 OP 667 DO 10.3368/jhr.46.3.647 VO 46 IS 3 A1 Richard Akresh A1 Ilana Redstone Akresh YR 2011 UL http://jhr.uwpress.org/content/46/3/647.abstract AB We measure the extent of language assimilation among children of Hispanic immigrants. Our identification strategy exploits test language randomization (English or Spanish) of Woodcock Johnson achievement tests in the New Immigrant Survey and lets us attribute test score differences solely to test language. Students scoring poorly may be tracked into nonhonors classes and less competitive postsecondary schools, with subsequent long-term implications. Foreign-born children score higher on tests in Spanish; U. S.-born children score higher in English. However, foreign-born children arriving at an early age or with several years in the United States do not benefit from testing in Spanish.