One of the most popular eCommerce websites, Ebay, has changed its reputation model several times during the last months. Each change in the calculation of the reputation score affects the mean number of transactions the buyer is willing to participate in and the mean payoff for each buyer. While...

The development of IT systems for coordinating business processes mostly starts with the definition of coordination mechanisms and organizational structures. This is usually based on assumptions about the cooperational behavior of the participating individuals. This top-down approach fails if...

Visions of 21st century information systems show highly specialized digital services and resources, which interact continuously and with a global reach. Especially with the emergence of technologies, such as the semantic web or software agents, intelligent services within these settings can be...