Bill writes:
>An interesting question, to which there is not a simple answer.
>
>The article below might help. As you will notice from reference to steam
>plows being the latest technology, this was written quite some time ago,
>certainly before computer software was considered a part of the machinery
>of production, but the analysis still seems remarkable useful. Or most of
>it anyhow.


Interesting perspective.  Thanks.
Yours,
Issodhos