At the same time, by comparing over time, case studies document that well-executed investments can provide benefits. These accrue through four main channels, namely (i) social infrastructure, often supported by community development funds using land compensation; (ii) employment and jobs; (iii) access to markets and technology for local producers; and (iv) local or national tax revenue. In all cases, economic viability of investment is a necessary condition for positive social outcomes to materialize, including food security. Even if overall effects are positive, distributional issues may arise and will need to be addressed upfront to inform negotiation and contract design