1# PS8.5, for Example 8.6 and the HCCM procedure
2open data8-1
3genr LNSALARY=ln(SALARY)
4genr YRS2 = YEARS*YEARS
5ols LNSALARY const YEARS YRS2 --vcv
6ols LNSALARY const YEARS YRS2 --vcv --jackknife
7