Well, part of the reason is that economists still try to understand markets by using ideas from traditional economics, especially so-called equilibrium theory.
Even the big companies that tried to crack local residential markets by using pieces of the Bells' network, like MCI and AT&T, found it tough to make money.
For the past decade, in each of the company's forays beyond the PC desktop -- whether to hand-held computers or television set-top boxes -- Microsoft has attempted to push into new markets by using the PC software model.
At present the rich world continues not only to obstruct such imports but to distort Africa's own markets by using them as a dumping ground for their own subsidised farm products.
Alternatively, it can improve its reputation with financial markets by using those savings to accelerate the pace of deficit reduction.The budget will be a test for Mr Kenny's fractious coalition.
The ICB hopes to keep these bits safe by both strictly limiting what they can do betting on markets by using derivatives, for instance, is strictly forbidden and by giving them the capacity to absorb extra losses.
