> On 17 Jul 2017, at 13:51, Fabien COELHO <coe...@cri.ensmp.fr> wrote:
> Is this bias expected from the drawing method, say because it is approximated 
> and the approximation is weak at some points, or is there an issue with its 
> implementation, says some shift which gets smoothed down for higher indexes?

I have checked paper where such implementation was proposed and there theta 
allowed only on range between 0 and 1. It seems like it is not guaranteed that 
it should work well when theta is more than 1.

I am attaching paper, see page 23.

Attachment: syntheticdatagen.pdf
Description: Adobe PDF document

Thanks and Regards,
Alik Khilazhev
Postgres Professional:
The Russian Postgres Company

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