Table 2.

Summary of criteria for balanced datasets

Case	Specific class	Rest class	Splits	Average size
Pioneers vs Rest	45	47 + 77 + 288	1 + 9	45 + 46
Settlers vs Rest	47	45 + 77 + 288	1 + 9	47 + 46
Positive Migrants vs Rest	77	45 + 47 + 288	1 + 5	77 + 76
Negative Migrants vs Rest	288	45 + 47 + 77	2 + 1	144 + 169