Adaptation to climate change is essential, particularly in countries that are vulnerable to climate change. However, it is suggested that adaptation by public actors and adaptation by private companies may be limited and there may be disregarded regions and sectors. This is because there appear to be some barriers that limit their participation. Public Private Partnership (PPP) seems to be a promising scheme to overcome the above barriers and solve the disregard of specific regions and sectors in adaptation. Although case studies are often carried out in adaptation PPP research, it is difficult to grasp the whole picture and to make general suggestions in terms of the distribution of adaptation projects. In this context, to investigate whether the degree of disregard of regions and sectors by adaptation PPP is not remarkable, this paper sought to create a database based on 361 cases of adaptation and analyze it, comparing to what degree of regions and sectors have been disregarded across four project categories: public, private, PPP, and others. The findings showed that adaptation by PPP did not have strong standard deviation in either target regions or target sectors when compared with those of other project categories. The small standard deviation in PPP suggests that regions and sectors that are concentrated are relatively few, and regions and sectors where public and private projects are not prioritized are also included as options.
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