In approaching their research question, the authors focus on the Economic Constitutions of the UK and of the USA, and upon the constitutional principles and institutional arrangements through which public accountability for Public-Private Partnerships (PPPs) operate. In the normative dimension of the people work they argue that the Economic Constitution of the UK should recognise that this legislation is necessary by virtue of the Concordat of 1932 properly applied to PPPs. In the normative dimension of the author work they argue that the Economic Constitution for PPPs in the USA should recognise that the executive and the legislature have a positive duty to proceed into co-ordination and systematisation of the criteria. Having provided the basic analysis and conclusions of one of the constitutional systems which the people explored, the authors move on to an evaluative discussion of the points which have been gained from the comparison of the UK and the USA.