Caicedo, 19, has put pen to paper on a four-and-a-half-year deal at Eastlands.

BBC: Man City complete Caicedo signing

If over the next year the yield on long Treasurys climbs four percentage points from where it is now, your total return on such paper will be -40%.

FORBES: Not Bonds, Books

The researchers found that, on average, a paper with four or fewer authors who are located in the same building was cited 45 percent more than if the authors were in different buildings.

FORBES: Harvard Study Suggests Working From Home Could Hurt Your Career

On September 16th, a strategy paper by four leading members of Germany's ruling coalition argued strongly against delay.

ECONOMIST: The single currency

As they reacted to sketches of the exterior and interior, four GM designers listened from behind a curtain, scrawling changes on paper.

FORBES: Have It Your Way

He published a paper on catastrophe theory in 1968, and his seminal book four years later.

ECONOMIST: Ren�� Thom

Now a research paper has shown that there is a practical benefit: four years on your life.

ECONOMIST: Oxbridge lifestyle helps dons live longer. No kidding