From an economic perspective, our world functions as a market. Within it, we all act as economic agents - constantly shifting between the roles of buyers and sellers. At work, we sell our skills, expertise, and experience. In our personal time, we buy goods, services, and experiences. Somewhere in between, we rest, learn, and restore our mental and physical energy - taking care of ourselves and those close to us. This constant role change is so natural that we rarely stop to