Dataset:  immwork.dat

Source: R. Higgs (1971). "Race, Skills, and Earnings: American Immigrants in 
1909", The Journal of Economic History, Vol. 31, #2, pp.420-428.

Description: Average weekly earnings, English speaking and literacy rates,
and Tenure in U.S. for immigrants from 35 nations working
in mining and manufacturing, 1909. 

Variables / Columns

Nationality   1-25
Average weekly wage  30-34  /* in dollars  */
% Speaking English   38-42
% Literate      46-50
% Living in U.S. more than 5 years   54-58