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People don't behave the way economics says they should. Massive simulations of human interactions will warn us of coming crises - from finance to flu

Knowing a bailout for Athens would be unpopular, Chancellor Angela Merkel wanted to postpone taking action on the Greek crisis until a key state election on May 9. But financial markets don't care about domestic German politics. Her delay could end up costing the country billions.

All across the United States, large and small cities are closing public libraries or curtailing their hours of operations. Detroit, I read a few days ago, may close all of its branches and Denver half of its own: decisions that will undoubtedly put hundreds of its employees out of work. When you count the families all over this country who don't have computers or can't afford Internet connections and rely on the ones in libraries to look for jobs, the consequences will be even more dire. People everywhere are unhappy about these closings, and so are mayors making the hard decisions. But with roads and streets left in disrepair, teachers, policemen and firemen being laid off, and politicians in both parties pledging never to raise taxes, no matter what happens to our quality of life, the outlook is bleak. "The greatest nation on earth," as we still call ourselves, no longer has the political will to arrest its visible and precipitous decline and save the institutions on which the workings of our democracy depend.

This is a new blog.

Development economics expert Ha-Joon Chang visits the RSA to dispel the myths and prejudices that have come to dominate our understanding of how the world works.

"De­ficit ter­ror­ists" are gutt­ing govern­ments and forc­ing the privatiza­tion of pub­lic as­sets, all in the name of "de­ficit re­duc­tion." But de­ficits aren't ac­tual­ly a bad thing. In today's moneta­ry scheme, in which most money comes from debt, debt and de­ficits are ac­tual­ly neces­sa­ry to have a st­able money sup­p­ly. The pub­lic debt is the peo­ple's money.