The $169 billion estimate of how much the bailout will cost assumes no errors in management.

Both estimates assume that the lenses will be changed weekly.

A conservative estimate assumes each person knows 150 people.

But the estimates assume the economy will grow at about 3.5 percent, which is unlikely.

That sounds like a bargain, but the estimate assumes no change in the current security environment.

The estimates assume the number of riders will grow about 13 percent by 1998.

The planning department's estimates assume that people will live longer.

The budget office's estimate assumes that greater use of managed care will help control Medicaid costs, as it has in the last few years.

The estimates assume that a business knows what is required and does not waste time.

These estimates assume that carbon dioxide is available at no cost.