"Slippage" is easy to track but includes everything--loss, employee theft, shoplifting, etc. "Sales lost to locking up" is a lot harder to track, and nobody ha

"Slippage" is easy to track but includes everything--loss, employee theft, shoplifting, etc. "Sales lost to locking up" is a lot harder to track, and nobody has been willing to be forthright about it. Mostly, this is sleight of hand. None of these companies want to admit that online (even their own!) is eating their lunch.