Trading in private shares is growing rapidly, though it's hard to pin down exact numbers.
The stylized action game is actually hard to pin down to a single genre.
Torrents are scattered, diverse and hard to pin down, and that makes them incredibly hard to stop.
It is sometimes hard to pin down Ms Royal's policies, but this does not mean she has none.
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Both incidents were terrifying but really hard to pin down a trigger to.
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At tiny scales, the position of an object is hard to pin down.
It is hard to pin down what has been causing honeybees to vanish.
For something so influential and intuitively appealing, it turns out that the Hawthorne effect is remarkably hard to pin down.
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Precise per-episode prices for internal sales are notoriously hard to pin down.
Both are hard to pin down, but a "lucky" air strike by Nato or a dramatic wave of defections could be crucial.
It's hard to pin down exactly how many millions are going to former insurgents to switch sides, but Macgregor argues the result is artificial progress.
It is hard to pin down the scope of identity theft.
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Often, this is a Virgin Mary as hard to pin down as the time frame, although we are told the setting is "now" in the Playbill.
While the truth in the situation is hard to pin down, the technical reality doesn't leave much risk that our iPads and iPhones will be compromised.
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The annual college basketball tournament offers the Tiffany network a three-week platform to reach the otherwise hard to pin down young male viewer, who is prized by advertisers.
By their nature, hawala networks are hard to pin down.
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It's simple to say, but very difficult to bring off, something that cannot be taught and really is hard to pin down, and it either works or it doesn't.
The exact reasons are hard to pin down, but resistance to chemicals, more people travelling and an increase in second-hand furniture sales have all been thought to play a part.
This is hard to pin down across the board.
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Wunmi's style of music is hard to pin down because she has so many cultural influences, including those from Nigeria, the land of her ancestors, and England, the land of her birth.
Merritt's music is hard to pin down: She incorporates gospel, soul, '70s California rock 'n' roll and warm echoes of Joni Mitchell's brand of folk music into her piano-based country songs.
Muzzled for weeks by U.S. securities regulations that have prohibited him from speaking publicly about the future of his company, James Murdoch has been hard to pin down for a formal interview.
The amount of caffeine in energy drinks is hard to pin down, because many are marketed as supplements, rather than as foods, allowing them to wiggle around FDA regulations and labeling laws.
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That liberation happens when companies turn to the cloud to reduce overdependence on big up-front capital investments and overall IT spending, and are thereby able to invest more in initiatives such as Customer Experience (CX) rather than another round of infrastructure sprawl whose value is increasingly hard to pin down.
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