Rahul, from the 2003 batch, had done a survey of the 2003 batch to get some information on the salaries, industries, and tried to arrive at a formula that would help predict the expected salary for someone in a company based on the number of years of experience he had and the size of the company. Therefore, if someone has 10 years of experience, and works at Oracle (which has 55,000 employees), (s)he should be earning =1.47*10+(3.3-LOG(55000))
= 13.26 lakhs per annum. Don't know if this is a 'CTC' or 'AGP' figure...
If there were more data points and some more attributes then some more variables could be added to this equation to account for things like the employee's role, his managerial or individual contributor level, etc... to account for these variations. After all, someone with 10 years experience may be a vice-president or a an engineer or something in-between. The current equation does not handle these variations...
Then there are people and recruiters who love parading a magic formula like "years x 2.5" if you have less than "n" years, and "years x 2" if you have more than "n" years, and "years x 1.5" beyond a certain number of years.
As Amitabh Bachchan tells Om Prakash in Sharabi, "munshiji, ye duniya paise ki itni diwani kyon hai?"