Various reviewers have argued that 1) the long-term estimates may be biased high and/or 2) the short-term estimates may be biased low.
Reviewers are very concerned with bias within recent estimates of growth. 
mnli hypothesis: Reviewers are very concerned with bias within recent estimates of growth.  premise: Various reviewers have argued that 1) the long-term estimates may be biased high and/or 2) the short-term estimates may be biased low.