There are many ways in which migration has been characterized. Cycles of migration may be permanent or longer term, they may be circular, following a particular pattern of movement to and from the home of origin, practiced over a number of years by the same individual or household, it may be seasonal with the movements following seasonal trends in resources and potential activities, and may be managed on long cycles or short cycles. The reasons for migrating and the relative benefits of this kind of life-style have been debated by academics. Some see migration as a way of managing livelihood risk and vulnerability, by diversifying the various income streams coming into the household and moving individuals into less risky income-generating activities at certain times of the year or according to changing economic circumstances