The city is a mix of the poor and rich, of slums and luxury hotels.
According to Nobelist Douglas North, the main difference between poor and rich nations is not growth rates.
Any self-respecting bank bull likes to whip out a chart comparing the ratio of bank loans with GDP in poor and rich countries.
One small step in the right direction would be to adopt a supplementary MDG commitment to halve by 2015 the gap between poor and rich when it comes child survival and school attendance.
They are what you get when you plot data for poor and rich countries together at a given moment in time, but actual levels of various pollutants in any individual country plotted over time wiggle around a lot more.
Imagine a society that has a bell-shaped income distribution curve with a broad middle class, a smaller number of rich and poor, and an even smaller number of super rich and super poor.
The road is open, and let us keep it open between the poor and the rich.
Poor kids and rich kids would be more likely to meet each other on the playground.
Compared with the poor and the rich, the middle class contains a greater range of interests.
Its innovative commenda, a partnership in which capital-poor sailors and rich Venetians shared the profits from voyages, allowed those of modest background to rise through the ranks.
Traditional geopolitical relationships would be turned upside down, with such resource-poor and technology-rich countries as Israel and Japan suddenly able to achieve energy self-sufficiency, while the oil-producing dictatorships would finally have to face the consequences of decades of squandered wealth.
But it asks questions about how it would do so, it poses challenges to an independent Scotland which it says other countries are facing, and it reflects the fact that public finances - in wealthy and poor, oil-rich and resource-starved - have a nasty habit of requiring uncomfortable choices.
The peacock with the bigger feathers still gets the hen, the rabbit buck with the white tail still gets the doe and genes get exchanged between rich men and pretty women more often than they do between poor men and pretty women or rich men and ugly women.
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And the poor are indeed getting rich. and it is those very factories, that very offshoring of manufacturing, which has enabled the poor to get rich.
And both rich and poor would suffer from a failure to launch a round.
These hold out the best hope, together with responsible macroeconomic management, of boosting Britain's growth rate and helping rich and poor alike.
And in some cities the poor are poorer and the rich richer than the national average.
Some who are rich become poor and some in the middle class become rich.
Assembled outside the Presidential Palace were old and young, veiled and unveiled, rich and poor.
The survivor will bring home to his district both glory and food, and everyone, rich and poor, watches the events on television.
It is thrilling to imagine them delivering insight and inspiration to knowledge-seekers old and young, rich and poor, in every corner of the planet.
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Pollsters say he is popular all over Indonesia, with both young and old, rich and poor, men and women, and city and country folk.
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Also, the gap between black and white, rich and poor, isn't as wide as it used to be, but it's not closing very much, either.
We have seen young and old, rich and poor, Muslim and Christian join together, and earn the respect of the world through their non-violent calls for change.
They are young and old, rich and poor and even, many of them, members of the much-vaunted middle-class that both Romney and President Obama repeatedly vowed to protect.
If it were easy to become rich we all would be, but as the rich and poor alike know intimately, getting rich is surely glorious, but also very difficult.
Obama was buoyed up on a groundswell of small donors, young and old, rich and poor -- people who wished to see a country restored and an economy rebuilt.
Black and white, rich and poor united in outrage.
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