# [hist-analytic] Anamolousness

Baynesr at comcast.net Baynesr at comcast.net
Sat Mar 13 12:29:43 EST 2010

```

Most of us are familiar with the formula 'd = 1/2gt2'.
The distance traveled by an object when dropped close
to the earth is a function of gravity (here 't' = 32ft
per sec.) We also know that this assumes no influence
of wind resistance etc.

However, it is also known that there is in all cases
*some* resistance. If we drop a steel ball from the
roof it falls faster than a feather from the same
distance. From the roof the distance travelled by the
ball is VERY close to the expected, unadjusted , value.
But notice this: if you take a piece a paper and cut
holes in it of one shape; drop it from the roof, then
it will fall at one rate; but if different holes
were to have been made of a different shape, without
affecting the area of the piece of paper, or its
other properties, then it would fall at a different
rate: one hole in the middle, e.g. vs. several small
holes totaling the same size in the other case.
So shape is a determinant of 'd' . But now consider
this: there is no LAW relating shape and 'd = 1/2gt2'.

We may want say that there is no law relating
shape and wind resistance, although they are related.
Between shape and fall there is no law llke connection.
This is not to say that the events are not physically
determined, only that there is no law relating *shape*
and fall. I think this may be a case of " anamolousness ."
I can't cite the passages here and now but this does
NOT originate with Davidson. Shape in the context of
such an experiment is what I shall call a "pseudo-
variable." More later. Applications to economics.

Although he doesn't raise this property as special,

M. Friedman makes good use of he gravity example

in discussing assumptions in economic theory.

"The Methodology of Positive Economics" (1953).

Included in M. Brodbeck's _Readings in the Philosophy

of the Social Sciences_MacMillan, 1968,

Regards

Steve

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://rbjones.com/pipermail/hist-analytic_rbjones.com/attachments/20100313/ae5cec7c/attachment-0002.html>
```