Tajima's D is a population genetic test statistic reflecting the difference between the mean number of pairwise differences and the number of segregating sites (https://en.wikipedia.org/wiki/Tajima%27s_D).

The values of Tajima's D are interpreted as follows:

Tajima's D=0: Population evolving as per mutation-drift equilibrium.

Tajima's D0: Balancing selection or sudden population contraction.

I would like to ask about the relevant time scale to interpret Tajima's D. Perhaps someone could suggest publications mentioning time or number of generations when interpreting Tajima's D?

Tanks!