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                            Running ESL  
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Soon I will start Chapter 4.  To understand the lectures, you should 
first run things on the computer and bring the output to class.  WITHOUT
THE OUTPUT, YOU WILL NOT BE ABLE TO FOLLOW THE LECTURES.

FROM YOUR HOME COMPUTER

If you bought the fourth edition of the book with the disk, follow the
directions on Page C-2 and install ESL (in MSDOS) and ESLWIN (in
Windows).  
If you have an older edition of the book and hence no disk, then 
borrow a copy of the disk from a classmate or use one of the PC's
in Econ 100.  If the UG library reserve desk will let you, you can check
out the disk that came with their copy of the book.  After you install
the program, exit temporarily to DOS and type  CD \ESL and press enter. 
to change to the directory in which the ESL program is stored.
DO NOT USE ESLWIN BECAUSE SOMETIMES IT DOES NOT WORK VERY WELL.

FROM PC LAB IN ECON 100

First exit from Windows to DOS.  Then type  CD \PGMS\ESL  and press 
enter to change to the directory in which the ESL program is stored.
DO NOT USE ESLWIN BECAUSE SOMETIMES IT DOES NOT WORK VERY WELL.

PRACTICE COMPUTER SESSION FROM CHAPTER 4 FOR CLASS

From DOS, type:   esl  data4-8  and press enter.


This will load the data described in Appendix D of the fourth edition.

When ? prompt comes, type each of the following commands one after another
(do not type items in parentheses; they are my comments)
  ols 1 0 2 3 4 5 6 7 8 ;                     (; is important)
  genr ESSU = $ess                            (saves error sum of squares)
  genr DFU = $df                              (saves degrees of freedom)
  omit 8 ;                                    (omit variables one at a time)
  omit 5 ;
  omit 3 ;
  omit 4 ;
  genr ESSR = $ess             
  genr DFR = $df
  genr NR = DFR - DFU                         (computes no. of restrictions)
  genr Fc = (ESSR - ESSU)*DFU/(ESSU*NR)       (computes F-statistic)
  pvalue                                      (loads pvalue subroutine)
  4                                           (select F-distribution)
  NR                                          (enter d.f. for numerator)
  DFU                                         (enter d.f. for denominator)
  Fc                                          (enter Fc as x-value)
  quit                                        (exit back to DOS)

From the DOS prompt, type the following commands.
  copy inpfile inp                  (if asked whether to override, say yes.)
  esl data4-8 -b < inp > out    (reruns esl in batch mode)
  lpr out > prn                     (prints the output on the printer)

Bring the output to class.  Without it you will be lost.
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