@pastanaga - That would increase my stress levels by quite a bit. Not just because supervisors could look over my shoulder (and let's face it, they can do that when you're in a cubicle anyway) but because there would just be no way to tune out the rest of the office.
I wouldn't be able to get any work done if I was constantly hearing other people's conversations and seeing them wandering around. And having to stop and start work would definitely increase my stress levels.
But I've got a touch of social anxiety so I probably wouldn't even like a cubicle that much. I guess it's just a matter of measuring whether the loss of productivity from stress from open plan outweighs the loss of productivity when people don't feel like they are under constant surveillance.