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If you want a truly convincing case, never mind the studies. Call some
local printers (offset printers, that is--not your local copy shop) and
get estimates. Besides, if you don't do this, and the print job turns
out to cost more than your study predicted it would, your credibility
will be shot to hell.
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Wearing my publisher's hat, I'd suggest researching your target readers.
If they are all anal retentives sitting in cubicles (like I did for years)
then they are OK about filing amendments--give them 3-ring binders.
Action types will *never* file amendments (although they may pay someone
else to do so)--give them perfect bound every time, regardless of cost.
I mean, you do want your magnum opus to be read/used by the punters, doncha?