EPA - Accountability would have a "chilling effect"

The summary is taken from the following quote from EPA Associate Administrator Christopher Bliley (Source: SFGate.com article):

"EPA is concerned about the chilling effect that would occur if agency employees believed their frank and honest opinions and analysis expressed as part of assessing California's waiver request were to be disclosed in a broad setting,"

Requesting:

1. Evidence or studies suggesting that EPA employees would perform less satisfactorily in an environment with an emphasis on transparency, where they may be held accountable for their decision making methods.