Forecast combinations have frequently been found in empirical studies to produce better forecasts on average than methods based on the ex ante best individual forecasting model. Moreover, simple combinations that ignore correlations between forecast errors often dominate more refined combination...

Once a preferred strategy, diversification has gradually been deinstitutionalized in the United States over the past several decades. We argue that changes that occurred in a closely related domain — graduate business education — are important in understanding variation in de-diversification...