The flip-side to the poverty trap, however, is that the gains of development tend to be sustained, once countries break through to sufficient levels of income, health and literacy.
Within domestic financial systems, different aspects of financial development tend to go forward together.
Small economies at an early stage of financial development tend to dance to their own tunes, Ms. Mehta says.
He goes on to list the cost of development, of paying talented people who tend to live in expensive cities and demand competitive salaries.
The transnationalists believe that U.S. courts can and should use their interpretive powers to promote the development of a global legal system, while the nationalists tend to claim that U.S. courts should limit their attention to the development of a national system.
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The problem is that just as price changes have to be severe to manifest any impacts on gas consumption, price changes on their own also tend not to do much to inspire the development of radical new tech solutions, unless prices are through the roof.
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Some would say that bubbles tend to coincide with periods of great economic change, such as the development of the railways or the internet.
Vladimir Arkhipov, the Russian foreign-trade ministry's representative in Primorsky Krai's free economic zone of Nakhodka wonders why Russians should tend to anything but their own development problems, such as those at Vostochny port.
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The spread of birth control and a desire for smaller families tend to accompany economic growth and development almost everywhere.
Given that depressed people tend to be less active and more withdrawn, these habits could influence the development of dementia, Saczynski said.
According to Evolution Robotics' chief executive, Paolo Pirjanian, who oversaw the development of Mint's software algorithms, tasks that come easiest to humans tend to be the most difficult for robots.
Jeffrey Sachs, a Harvard economist, has drawn attention to the scale of the problem: poor countries cannot afford expensive medicines, and drug companies naturally tend to focus their research on finding cures for the ills of the rich (see Jeffrey Sachs on development and Medicines for poor countries) rather than the afflictions of the poor.
Because the stomach contents tend to be acidic, they irritate the lining of the oesophagus - a phenomenon which has been linked to the development of cancer.
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