Executives' duties depend on how many people are on their staff. Some executives oversee general managers in different areas. In larger organizations, they may direct one area, such as marketing, finance, or legal services. For example, in the financial area, executives may direct the buying or selling of land or other investments. Other executives get more involved. They may hire and train new staff. They may direct staff in what tasks need to be done. They may choose computer systems to record data, such as budgets. When complaints arise, executives may direct investigations to resolve what occurred in the agency or between staff members.