Comparison of Frontier Efficiency Methods: An Application to the U.S. Life Insurance IndustryJ. David Cummins, Hongmin Zi|Journal of Productivity Analysis|1998Cited by 324
Organizational Form and Efficiency: The Coexistence of Stock and Mutual Property-Liability InsurersJ. David Cummins, Hongmin Zi, Mary A. Weiss|Management Science|1999Cited by 303
Conglomeration versus Strategic Focus: Evidence from the Insurance IndustryAllen N. Berger, Hongmin Zi, J. David Cummins et al.|Journal of Financial Intermediation|2000Cited by 238
The effect of organizational structure on efficiency: Evidence from the Spanish insurance industryJ. David Cummins, Hongmin Zi, María Rubio‐Misas|Journal of Banking & Finance|2004Cited by 180
Organizational Form and Efficiency: An Analysis of Stock and Mutual Property-Liability InsurersJ. David Cummins, Hongmin Zi, Mary A. Weiss|SSRN Electronic Journal|1997Cited by 57