PSBs are already exposed to competition as their audience figures are compared with those of their private rivals, and they constantly have to justify the level of their license fee or subsidy. Outsourcing most actual program making, as the BBC does, provides a competitive environment in which costs can be controlled effectively. Nor does public ownership prevent organizations from raising money - government bodies often resort to bond issues to fund investment. The BBC has successfully launched BBC Worldwide and developed a profitable commercial arm while remaining a public corporation.