For people -- manufacturers or otherwise -- who go to trade shows how do you measure your ROI? Are you looking at your booth traffic vs. how many people come to the show? Do you know how many big spenders are actually at the show? I found this site that audits trade show traffic and the reports provide some interesting insights. The 2013 numbers for ASIS (who says attendance was up 5.5% this year from last) and ISC West aren't up yet, but you can see past years online.
Here are some excerpts from the ASIS 2012 audit:
Attendees security budgets:
and what people were interested in looking for:
Here are the other reports:
And ISC West's:
Finally, see how much booths cost.