This paper experimentally investigates the relationship between an investor and a project manager. Project managers choose from a pool of projects, the success probabilities of which are uncertain. Information about the future success probability of a project is gained by observing its outcome. Investors can change projects, but also have to change project managers if they want to do so. An additional joint project or a voluntary transfer precedes their interaction. We hypothesize that investors favor projects that are managed by project managers with whom they have shared positive experiences in the past, even though these past experiences do not provide any information about a project's success probability. The role of this social element is isolated using a control treatment in which the role of the project manager does not exist. Interaction through a voluntary transfer plays a clear and significant role in the investors' decision making via bonding, whereas the influence of merely sharing a positive or negative experience proves more complex.