Social networks are currently gaining increasing impact especially in the light of theongoing growth of web-based services like facebook.com. A central challenge for the socialnetwork analysis is the identification of key persons within a social network. In this context,the article aims at...

The market for the new provisioning type Software-as-a-Service (SaaS) has reached a significantsize and still shows enormous growth rates. By varying size of SaaS products, providerscan improve their market position and profits by successfully acting in the tension area ofcustomer acquisition,...