This paper reports research findings on the relationship between competitive methods, generic strategies, and firm performance. It was found that competitive methods in the banking industry correspond to Porter's generic strategy types and that a cost leadership strategy provides a statistically...

This paper reports research on the number of competitive methods used by firms and their impact on firm performance. The research was based on a survey of banks in the New England Federal Reserve district. It was found that an increased number of competitive methods resulted in a higher level of...

For the general Gauss-Markov model with E(Y)=X[beta] and Var(Y)=V, we give a concise proof of an explicit characterization of the general nonnegative-definite covariance structure V such that the best linear unbiased estimator, weighted least-squares estimator, and least-squares estimator of...