Explanations for the Absence of Derivative Suits Anna Karenina Principle Four Necessary Criteria 1.Minimum Share Ownership Requirements 2.Costs and the Allocation of Litigation Risk 3.Access to Information 4.Limitations regarding Potential Defendants Page·10Page  10 Explanations for the Absence of Derivative Suits Four Necessary Criteria 1. Minimum Share Ownership Requirements 2. Costs and the Allocation of Litigation Risk 3. Access to Information 4. Limitations regarding Potential Defendants Anna Karenina Principle