Key points are not available for this paper at this time.
The gravitino must be either light enough so that ambient gravitinos would not produce too large a cosmic deceleration, or heavy enough so that almost all gravitinos would have decayed before the time of helium synthesis. The second alternative is shown to allow supersymmetry-breaking scales above a model-dependent lower bound of 10^11 to 10^16 GeV.
Steven Weinberg (Mon,) studied this question.