The implementation of stakeholder engagement has received much attention from practitioners and academics. The pyramid's base is economic legitimacy–the feeling among stakeholders that a company offers a net economic benefit to them. Stakeholders, particularly in the developing world, are often poor and uneducated. The foundation for the social license to operate is a sense that stake-holders are better off thanks to the presence of the investor. One critical element in building and maintaining interactional trust is managing the expectations of stakeholders. A good example of the importance of sociopolitical legitimacy is the prominent role played by respect for local culture and tradition, including dancing, in the multi-stakeholder dialogue table at the Ambuklao-Binga hydroelectric dam in the Philippines. According to staff from NGOs that participated in the process, these personal and emotional factors helped to convince skeptics that BHP-Billiton was serious about reform. Efforts to achieve cooperation among stakeholders have been branded a partnership approach.