And in a world where the cost of connectivity is constantly falling, exchanges have asked us at the SEC to raise these prices over and over again.
She says they have enough to eat and drink, but she worries about her two-year-old grandson, who is constantly falling ill because of the cold.
As a result, the value of in-game currency is constantly falling and prices are constantly rising.Mr Castronova's analysis of the economics of fun is intriguing.
Horace Dediu, a former Nokia executive who now works at the Clayton Christensen Institute at Harvard Business School, likes to say that Apple is like an object in orbit: the maths suggests it is constantly falling, yet it never hits the earth.
The most glaring problem, Gartner found, is at AT&T. "AT&T is constantly falling below the threshold," said Ken Dulaney, a mobile computing analyst for Gartner, who said he had heard from three of Gartner's major corporate clients in the last three months that their employees were frustrated with AT&T's service.
A camera's sensor is constantly bombarded with light; rain is constantly falling on the field of buckets, to return to our metaphor, but when you're not taking a picture, these buckets are bottomless and no one is checking their contents.
