When Rousseau wrote his social theory, concepts of liberty and freedom were not new ideas. Hints of social contract reasoning are found in earlier works, most notably in Book 2 of Plato's dialog The Republic, as well as, in Socrates.
The total spending per iTunes account is $43 per year across all media, says Dediu. At 575 million iTunes accounts, that works out to $24.7 billion of consumer spending at iTunes per year. The average iTunes account's annual spending on software has followed music's trend, falling to $9 from $42 in 2008. However, average annual spending on apps has gone in the opposite direction, rising to $16 this year from $7 in 2008.
Don't waste your time on this. All the biggest hits are only availablie if you buy the whole album. Admittedly, 14 songs for $9.99 is a pretty good deal, but when all you want is Somewhere Out There, it's a waste of $9.00. A message to iTunes: Totally not cool to force people to buy 13 songs they don't want in order to get the ONE that they do.