clear all
close all
clc

load wage2.mat;

%   Obs:   935

data = wage;

%   1. wage                     monthly earnings
%   2. hours                    average weekly hours
%   3. IQ                       IQ score
%   4. KWW                      knowledge of world work score
%   5. educ                     years of education
%   6. exper                    years of work experience
%   7. tenure                   years with current employer
%   8. age                      age in years
%   9. married                  =1 if married
%  10. black                    =1 if black
%  11. south                    =1 if live in south
%  12. urban                    =1 if live in SMSA
%  13. sibs                     number of siblings
%  14. brthord                  birth order
%  15. meduc                    mother's education
%  16. feduc                    father's education
%  17. lwage                    natural log of wage

wage = data(:,1);
IQ = data(:,3);