Facebook is free, but should it count toward GDP anyway?

For several decades, gross domestic product (GDP), a sum of the value of purchased goods, has been a ubiquitous yardstick of economic activity. More recently, some observers have suggested that GDP falls short because it ...

Using physics to make better GDP estimates

A team of Italian physicists has used economic complexity theory to produce five-year gross domestic product (GDP) estimates for several countries around the world. In their paper published in the journal Nature Physics, ...

On the edge of friction

(PhysOrg.com) -- The problem exists on both a large and a small scale, and it even bothered the ancient Egyptians. However, although physicists have long had a good understanding of friction in things like stone blocks being ...

Molecular switches are not just 'on' or 'off'

The GTPases constitute a very large protein family, whose members are involved in the control of cell growth, transport of molecules, synthesis of other proteins, etc. Despite the many functions of the GTPases, they follow ...

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