This paper uses the data on males and females from the 1989 Legalized Popul
ation Survey (LPS), a sample of aliens granted amnesty under 1986 Immigrati
on Reform and Control Act, to analyse English language proficiency and earn
ings. We use a model of English language proficiency that is based on econo
mic incentives, exposure and efficiency variables that measure the costs an
d benefits of aquiring English language skills, Consistent with the model,
in this sample of former illegal aliens, English language proficiency is gr
eater for those with more schooling, who immigrated at a younger age: who h
ave been in the United States longer, with a more continous stay, and who h
ave less access to other origin language speakers where they live. Earnings
are higher by about 8% for men and 17% for women who are proficient in bot
h speaking and reading English, compared to those lacking both skills. JEL
classification: J24, J31, J61, J15.