Pretty O'Neill cylinders, but...

Hi,

I'm new to this group and have a quick question: SPS is often touted
as the great justification for building these giant habitats (for the
SPS workers), but has anyone actually done an economical analysis if
SPS can compete with existing power sources? If it can't we should
drop that concept and rather spend our energy thinking up alternative
methods of getting from here to there.

Espen