Does ranking of schools in Kenya make economic sense?

The Ministry of Education has brought to an abrupt end school rankings, a time-honoured tradition that set the nation alight twice a year with publication of KCSE and KCPE results.

The reason given for the ban on rankings include the use of unscrupulous methods to raise the school ranks and cheating in the exams. But I think, there is another reason that no one wants to say aloud; ranking is used to advise private schools and give them an edge over the public schools.