That will become a serious drawback as video-on-demand quickly becomes a standard product, says Craig Moffett, an analyst at Sanford C.

ECONOMIST: News Corporation

And that has been considered a rather serious drawback of patent pools.

FORBES: Patent Pools: Do They Kill Innovation?

And a more serious drawback, seen in Thailand, is that by appearing to eliminate currency risk a fixed rate encourages firms and banks to borrow heavily in foreign currency at cheaper interest rates than on domestic funds.

ECONOMIST: Getting out of a fix