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Ever since scholars recognized that family firms are heterogeneous, many studies have attempted to compare different types of family firms without ensuring that the source of heterogeneity is unique to family firms. When the source of heterogeneity among family firms resembles the source of heterogeneity among nonfamily firms, the problem of counterfactual indeterminacy bias can lead to misleading or irrelevant findings that fail to distinguish the effects of family influence from factors that affect all firms. We delineate common forms of this bias and offer recommendations to prevent it in research on family firm behavior and performance.
Fang et al. (Thu,) studied this question.