The book's aim is to find out dependence between Organisation Life Cycle, Country Socioeconomic Characteristics and Top Management Team Characteristics. In the dissertation Organisation Life Cycle Impact is tested on Top Management Team Characteristics in the biggest corporations in Switzerland, Germany and the Czech Republic. Detailed approach is applied in order to classify the companies in individual Phases of the Organisation Life Cycle. The book is based on wide specific literature on Organisation Life Cycle, Country Socioeconomic Characteristics and Top Management Teams. There are applied methods of regression and correlation analysis for figuring out Organisation Life Cycle and Country Socioeconomic Characteristics Impact on Top Management Team Characteristics.In the Phase of Maturity Top Management Characteristics are close to the theoretical ideal values and the countries with the best socio-economic characteristics are close to the theoretical ideal values as well.