Abstract
In Japan, scale expansions in stock raising farms have rapidly progressed and environmental problems caused by mal-processing of livestock excreta have increased. Joint composting facility is thought to be one of the most effective solutions to the problems. However, such facilities do not widely spread yet. In this paper, the authors estimate influence of external factors on the joint composting facility quantitatively by applying a causal model. The study area is Okayama prefecture. Furthermore, based on the results, we discuss some policy implications to spread the joint composting facilities.
