Upper echelons theory
The underlying assumptions of the upper echelons theory are that top managers' decision-making processes determine competitive strategies, and that such strategies affect firm performance (Hambrick and Mason, 1984). Much of the research in Upper Echelon Theory has sought to demonstrate that decision-making processes are affected by the characteristics of individuals in top management positions as well as the composition of teams and the team dynamics. Competitive strategies may include the choice of business strategy, such as low cost, differentiation, and focus strategies. They may also affect corporate strategy such as vertical and horizontal integration, as well as diversification. Business and corporate strategies are well-known to affect the financial performance of firms and new ventures. When applied to entrepreneurial teams, characteristics that have been examined include age, formal education, length of job tenure, and functional experience. Heterogeneity, such as th