Therefore, the total sample of households is subdivided by region, by expenditure class, and by farm and non-farm type, in an attempt to capture systematic parameter differences between these sub-groups. For this study, Indonesia is divided into four areas according to similarity of consumption pattern and geographical closeness: Sumatra, Jawa (including Jakarta and Bali), Sulawesi/Kalimantan, and Papua/Malku/Nusa Tenggara. Part of the food that farm households consume is produced on their own farm.