Claire and Ray then leave national service, join rival cosmetic firms, and try to steal the formula for an important new product.

NEWYORKER: Duplicity

Most economists think that the CPI method is the right one, because its formula mimics the behaviour of consumers, who buy less of a product that is becoming relatively dearer.

ECONOMIST: The switch in price indices

The Ministry of Health cleared Synutra, yet the allegations recalled the sale of tainted infant formula in 2008 and a long list of product safety and other problems involving business ethics in the country.

FORBES: On The Front Line In China: Challenging Business Ethics

The study used an older formula replaced last year with Purell Advanced, an alcohol-based product the company says is more effective at killing bacteria and even easier on the skin.

WSJ: How Alcohol-Free Hand Sanitizers Hold Up

One medical student interested in applying cold called a few finance professors and created his own valuation technique, using a formula including the relationship between the number of Facebook friends and the average product price.

FORBES: Impact Investing Gets a University Center

The formula itself makes sense because what GDP is attempting to measure is the gross domestic product.

FORBES: Here's Why The U.S. Economy Is A Lot Stronger Than Numbers Suggest

Apple has a formula that has made it the most valuable company on earth and made the iPhone the most profitable single product on the planet.

FORBES: iPhone Haters are "Right," Nothing to See Here

Edwin Perkins, the inventor whom Hastings now proudly claims, actually spent only 11 years there: in 1931, four years after hitting on the formula to reduce juice concentrate to crystals, he moved on to Chicago, the better to distribute his product nationally.

ECONOMIST: Nebraska’s Kool-Aid test | The