Diversified Company Performance: Evidence from the United States Airline Industry

Abstract This paper analyzes the effect related diversification strategy has on firm performance. Based on a sample of 70% of US airlines, this piece of research investigates the relationship between the degree of diversification and corporate profitability. Multiple linear regression models of panel data (i.e., 6 years) were tested, with model parameters estimated by the Generalized Method of Moments (GMM) technique. We identified that firm performance followed an inverted-U curvilinear pattern. That is, boundary-spanning activities of related diversified firms increase coordination efforts to the extent that, at some point, the benefits of this strategy are offset.