If you don't want to cite your sources, that's fine. However, without a proper citation there is no way to verify the credentials which you have claimed for them or the accuracy of your summary of their position. Your claims that they were "very highly qualified and experienced economists" and "post-doctoral researchers" who "subsequently worked for several years in major City companies you've heard of, both reaching senior positions unusually quickly" are at best an irrelevant distraction, and could be considered an attempt to lend unsubstantiated authority to your own position.