1. Compare and contrast the three basic types of planning models: aggregate growth models, input-output analysis, and project appraisal. What do you think are some of the strengths and weaknesses of these models from the standpoint of planning in developing nations?

2. Discuss the potential role of NGOs in relation to the government and private sectors. What are the most important potential areas of comparative advantage of NGOs? What are the most important "voluntary failures" that can inhibit NGOs from realizing their comparative advantages in development activities?