Disentangling these different factors is impossible, in practice. A Deloitte report15 found that policy uncertainty was detrimental to investment in baseload electricity, including combined cycle gas turbines, and as a result, OCGT was considered the lowest risk investment as it has lower capital costs. Deloitte calculated the cost of policy uncertainty, in terms of sub-optimality in investment, characterised by a preference for OCGT rather than OCGT.