Well, you can stick your own numbers into the model and see what you get—a few tweaks in the estimates puts farmer ancestors higher, as would assuming more prehistoric lineage collapses.
For example, if you think that almost everyone who had offspring from 2000BC-1200AD was your ancestor, then you get more farmer ancestors. I initially put it closer to 40% (assuming little to no Sub-Saharan or Native American ancestry, and a more gradual spread throughout Eurasia), but the model is sensitive to these estimates.
From a “Eurasia-centric” perspective, my sense is that personal ancestry doesn’t make a major difference except for pockets like Siberia and Iceland, perhaps. It’s noticeably different for people with some New World or Sub-Saharan ancestry, and wildly different if you’re pure-blooded Aboriginal Australian.
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Well, you can stick your own numbers into the model and see what you get—a few tweaks in the estimates puts farmer ancestors higher, as would assuming more prehistoric lineage collapses.
For example, if you think that almost everyone who had offspring from 2000BC-1200AD was your ancestor, then you get more farmer ancestors. I initially put it closer to 40% (assuming little to no Sub-Saharan or Native American ancestry, and a more gradual spread throughout Eurasia), but the model is sensitive to these estimates.
From a “Eurasia-centric” perspective, my sense is that personal ancestry doesn’t make a major difference except for pockets like Siberia and Iceland, perhaps. It’s noticeably different for people with some New World or Sub-Saharan ancestry, and wildly different if you’re pure-blooded Aboriginal Australian.
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I explained why I think tracing back personal history is impractical.
Your separate method to spot check my model is just a simplified version of the same model.