Bandura's studies show that children would imitate an aggressive model who demonstrated aggression against an inflatable doll, especially if the model was the same sex and they were rewarded for doing so.
Evidence in social learning theory is important because it supports Bandura's claims that behaviour can be acquired by observation and imitation and that the likelihood of imitation is affected by vicarious reinforcement and the characteristics of the model.
This strongly suggests that individual differences in social behaviour like aggressiveness are genetically influenced and not simply a product of different experiences of modelling.