The decision to go to the four-class system was driven by economic benefits for the small schools.

But the Administration's final decisions were largely driven by events outside the negotiators' control.

Senior Administration officials denied that today's decision was driven by commercial considerations.

"My decision is not driven by any rally," he said.

What actually happened, according to town officials, is that the decision was driven by fears of legal liability.

Microsoft's decisions were almost certainly driven by their standard policy of operating system support.

Most decisions are driven by a chaotic response to modest problems and issues as they appear.

Not all decisions, however, will be driven by the bottom line.

If we think this way, our decisions will be driven, at least in part, by consumers' tastes.

To a large degree, the political decisions in the weeks ahead will be driven by the economy.