Options ls=78 nodate;

FILENAME instore 'beefpork.dat';

DATA one;
INFILE instore DLM='09'x DSD MISSOVER;
INPUT year  pbe cbe  ppo cpo pfo dinc cfo rdinc rfp;

PROC REG DATA=one;
  MODEL pbe = cbe pfo dinc cfo rdinc rfp year /
    SELECTION = RSQUARE ADJRSQ MSE AIC SBC CP;
  TITLE 'FULL MODEL TEST WITH SOME SELECTION CRITERIA for beef price';

PROC REG CORR DATA=one;
  MODEL pbe = cbe pfo dinc cfo rdinc rfp year / P SS1 SS2 COLLIN VIF;
TITLE 'Full model test the beef price';

PROC REG DATA=one;
  MODEL pbe = cbe pfo dinc cfo rdinc rfp year /
    SELECTION = stepwise;
  TITLE 'FULL MODEL TEST WITH STEPWISE SELECTION for beef price';

PROC REG DATA=one;
  MODEL pbe = cbe pfo dinc cfo rdinc rfp year /
    SELECTION = backward;
  TITLE 'FULL MODEL TEST WITH BACKWARD SELECTION for beef price';

Submit to see output