Buy an e-book on Amazon or an album on Apple's iTunes and you own it, right?
Maybe not as much as you think.
It's all about what the tech industry calls digital rights management, and the bottom line for consumers is that there are significant differences between owning a tangible product and owning its electronic equivalent.
A study to be released Friday by researchers at Case Western Reserve University School of Law and UC Berkeley finds that "a sizable percentage of consumers" have no clue about what they're really purchasing when they "buy" digital content.
"They mistakenly believe they can keep those goods permanently, lend them to...