31 Nestor: From the outset, donors and implementing organizations should be designing initiatives with a long-term sustainability model in mind; there needs to be a clear and realistic vision of how such functions will work in the future without ongoing donor support. For functions of a private nature this is pretty straightforward. For functions of a more public nature, it entails identifying actors that have the incentives and capacity to perform or pay for essential functions in the long term, and then using catalytic donor resources to build towards that vision. But commercial revenue is not the only path to sustainability. In some instances, initiatives can be sustained if governments value the work and have the ability to support it. Either way, it’s necessary to design and adapt the initiative to deliver what market actors are willing to pay for. From the donor perspective, we hope to see a clear vision of how these public or collective functions will be provided and paid for in the future, without further donor support. A long-term view also encourages donors to act as conveners, identifying and uniting multiple actors to ensure that market-building initiatives are complementary. View the original article on NextBillion