DATA ONE;                          * creates a data set ONE ;
INFILE 'A:\one.dat' firstobs=2;    * reads one.dat, skip line 1;
input yr hw pgnp n pop ql rgnp u r;* INPUT variable names ;
   lnpgnp=log(pgnp);               * take the natural logarithm ;

******************* Procedures ************************;
PROC means data=one;          * call procedure MEANS use data ONE;
run;                          * RUN the program;