These are the contents of datafiles in the sub-directory CHAP4.DAT:

Filename:  CHOW

THIS DATA SET CONTAINS THE FOLLOWING VARIABLES:

VOLUME  Number of computers installed in the year
RENT    Monthly rental fee
BINARY  Number of binary digits in a word
DIGITS  Number of bytes in each binary digit
WORDS   Number of words in main memory, in thousands
ADD     Addition time
MULT    Multiplication time
ACCESS  Access time
YEAR    Year in which the model was introduced
ORDER   The order of the observation in the dataset
IBMDUM  Equal to one for IBM products, zero otherwise

There are 137 observations.  Source: Gregory C. Chow

Filename:  COLE

THIS DATA SET CONTAINS THE FOLLOWING VARIABLES:

DEVICE    = Computer Model Number
FCS       = Year of First Customer Shipment
CAP       = Capacity, in Megabtyes
ACT       = Number of Actuators (read/write heads) on the Device
ACCT      = Average Access Time in Milliseconds
ROTD      = Average Rotation Delay in Milliseconds
TR        = Transfer Rate in Kilobytes per Second
ARDEN     = Areal Density in Kilobits per Squared Inch
PRICE     = Price in Nominal Dollars
SPEED     = ACT/(ACCT + ROTD + (2000/TR))

OLDTR     = Old data series for TR (see note below)
OLDARD    = Old data series for ARDEN (see note below)
OLDPR     = Old data series for PRICE (see note below)
OLDSP     = Old data series for SPEED (see note below)
DUM72 to DUM84 = Year-specific dummy variables for observation year

Note:  The original data used by Cole et al. in the regression results reported in Chapter 4 contained several data errors.  These errors have been corrected in the above data series.  However, in order to replicate the reported Cole results, the original data (with errors included) need to be used.  In the second set of 91 lines, there first appear the data series for TR, ARDEN, PRICE and SPEED with errors included; these variables are named OLDTR, OLDARD, OLDPR and OLDSP.  



Variable Names: 

   For first 91 lines: DEVICE YEAR FCS CAP ACT ACCT ROTD TR ARDEN PRICE SPEED
   Then a blank line:
   For second 91 lines: OLDTR OLDARD OLDPR OLDSP D72 D73 D74 D75 D76 D77 D78
                        D79 D80 D81 D82 D83 D84

There are 91 Observations.  Source: David Cartwright, US Dept.
   of Commerce, Bureau of Economic Analysis 

Filename: WAUGH

PRICE    = Relative price per bunch of asparagus -- percentage of the top
           quotation in the Farmers' Produce Market Report for the Massa-
           chusetts Dept. of Agriculture for the day on which each lot was
           sold 
GREEN    = Number of inches of gren color on the asparagus, in hundredths
           of inches
NOSTALKS = Number of stalks of asparagus per bunch 
DISPERSE = Variation in the size of the stalks -- the interquartile
           coefficient

Source:  F.V. Waugh, QUALITY AS A DETERMINANT OF VEGETABLE PRICES, New York:
         Columbia University Press, 1929, pp. 127-131.

There are 200 observations.