Chief executives usually set directors' pay, he said, using comparative data from other corporations.

However, even then, little comparative data exist for these potential treatments.

Russell Reynolds does not have comparative data for most other questions, which are new to this survey.

If the board used comparative data, it would be required to share that information.

Rather few comparative data are available from which to assess recent status changes, but these appear to have been marked.

Private health plans typically provide more comparative data than the federal Web site.

There are several similarities of note in regard to this comparative data.

"It hasn't been possible to do this before because there wasn't a great deal of comparative data," he said.

"But the truth is, we need a lot more comparative mammalian data," she said.

This year, for the first time, they are published by local authority - giving us a level of comparative data we have never had before.