It seems that in the past the weights were based on estimates.

His advances were based usually on careful estimates of how much a book would sell.

First Boston based this assumption on independent estimates of energy resources in the area.

So your payments will have to be based on estimates of profits.

This census cannot be considered accurate as it is based on previous records and estimates.

The last census was done in 1991 so present population facts are based on estimates.

Decisions are based on estimates of whether an individual will benefit medically.

As a result, all the measures that are taken are based on estimates.

This figure may be based on possible estimates, but these have no normative character as such.

Everything the network comes up with is based on estimates from Nielsen data.