Joel C. Ewing writes:
This also suggests that calling the statistics "INVALID" may be too strong
a pejorative, as all the counts reflect actual activity to the file - it's
just that they do not represent ALL the activity to the file.
and there is a perspective from which his view has merit.
The operators of gambling casinos sometimes under-report their betting
volumes and thus also their profits. This practice, called skimming, has
the merit that it reduces their tax liabilities.
However convenient this under-reporting may sometimes be, its defense
because these low reported figures "reflect actual activity . . . just not .
. . ALL the activity" in the casino is disingenuous, as is Mr. Ewing's
defense of the use of invalid, because biased in the technical sense, VSAM
statistics.
John Gilmore
Ashland, MA 01721
U.S.A.
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