Making comparisons with others can be demotivating for some pupils.
This needs to be kept in mind when making comparisons with the rest of the sector.
In the third quarter, Amazon sold its toy catalog business, making comparisons with 2002 difficult.
Nobody is looking at the cellphone industry and making comparisons with Detroit.
"One cannot help making comparisons with infrastructure in the U.S. and U.K.," he said.
Jesselyn Radack, a US lawyer who represents whistleblowers, was among those quick to caution journalists about making comparisons with Snowden.
He heard it only after his son-in-law told him about internet chatter making comparisons with Stairway, he said.
Economists are not making comparisons with the Great Depression of the 1930s, when the unemployment rate reached 25percentt.
Making comparisons with other banks is difficult, as few quantify their potential exposure in the way that JPMorgan Chase does.
But in March, the UN's man on the spot started making comparisons with the Rwandan genocide of 1994.
Perhaps Federer will show the same resolve, although to be making comparisons with Sampras is premature, a difference of 12 grand slam titles to be precise.
