In four empirical studies, this cumulative work provides valuable insights for marketing executives of statutory health insurance funds and social media responsible. Paper I and II provide evidence about the importance and interplay of price and corporate reputation on the market of statutory health insurance. The second part changes perspective to corporate communication issues in the social media environment. By introducing the "social media brand value chain" paper III conducts a literature review of state of the art social media research. By means of a field experiment on Facebook, paper IV shows that brands do not necessarily have to communicate via their brand fan pages in a highly interactive and vivid way to positively influence attitudinal measures among their fan base. Contents The Effect of Corporate Reputation on Health Insurance Choices in a Public-Policy-Shaped Environment of Premium Equality The Effects of Additional Contributions on Statutory Health Insurance Choices in Germany Social Media Effects along the Value Chain - A Narrative Review Corporate Brand Posts on Facebook - The Role of Interactivity, Vividness, and Involvement Target Groups Researchers & students of general- & health management, marketing, and social media Professionals of marketing, web agencies, and statutory health insurance funds The Author Dr. Markus Kick received his degree at the Institute for Market-based Management under supervision of Prof. Dr. Manfred Schwaiger at LMU Munich.