The very smart Liz (thanks for that discussion of harvest-based economies offering a partial justification for those study results; i had that thought except that it was not clear what era that study was referring to) said:

"Three different people will come up with totally conflicting information from the same set of stars..."

I think that may be because not all astrologers are concerned with or looking at the same information...some might be hacks using substandard software that does not offer accurate calculations...others might emphasize moon movement over other planets...and interpretation of data is as individual as the astrologer doing the interpreting...

peg