It seems that the old-school method of boosting network revenues from cross-promotional efforts have not worked for NBC at recent Olympics, and due to changing landscapes in demographics and viewing habits, may not prove useful in the future.

FORBES: Comcast/NBC Overpays for Olympic Rights: Strategically Savvy or Slightly Stupid?

Using a different econometric method gets a cross-elasticity of about .20%, or a 2% increase in gas for every 10% decrease in price.

FORBES: Frack Gas Not Likely To Displace King Coal, Study Suggests

On September 28th, the Civil Aviation Authority, the airports' regulator, is to recommend a new method of price regulation, which will end the cross-subsidy of airport charges.

ECONOMIST: Airports

This means that Dr Meredith's method can reach back into the distant past, and catch a glimpse of the act of cross-fertilisation between two different varieties of grapevine that created the strain that the cuttings have perpetuated.

ECONOMIST: Genetics