If we can do this...

[BrilloPad]

It depends on how exactly productivity is measured. There might be some distortion if the entire output of a particular firm is considered to be zero due to a sale being booked in another country but it's going to be pretty small in comparison to the size of the entire economy. That can probably be corrected for on a case by case basis. Profit has little to do with it though, even people who work for loss making firms are productive.

When every firm does it then its different.

[doodab]

When every firm does it then its different.

Well, yes, it would be, but we're talking about measuring something in the real world not hypothetical situations in la la land.