The research domain that attempts to study the relationship between diversification and performance has not yet reached definitive and interpretable findings, and recent studies challenge the existence of a "diversification discount" and explain it partially by a data artefact. None of these...

Diversified firms are supposed to be valued less than the sum of their parts because of the diversification discount, but subsequent research has found that the relationship between diversification and shareholder value is not causal. We analyze the relationship between diversification and...