Grounded...

One of the things I need to tackle in my PhD is to ground my research in theory. Simply, it isn't acceptable to conjure up some grand scheme without showing the theoretical basis from which your ideas emerge. As none of the three main theories of governance (agency, stewardship and resource dependency) account for all situations, I have been looking at decision theory as the theoretical basis for my research. Further, research method also needs a theoretical basis. I am planning to use an iterative inductive-deductive-inductive method, based on grounded theory. 

Do you know of someone in New Zealand or Australia who is an expert in decision theory or grounded theory? If so, can you please contact me because I'd like to speak with them to build my knowledge. Equally, if you can point me to some good books or academic articles, I'd appreciate that as well. As these theories are new territory for me,  I'd welcome any and all suggestions—thanks in advance!