The risks that must also be considered are those that are shared between the two sectors. These are the uncontrollable, environmental factors that include inflation, interest rates, and changes in legislation. Any of these risks could alter the value of a partnership and could potentially discourage investing in projects with the private sector and vice versa if there is no certainty in the economic stability of the program. This will affect both sectors and prove to impact their decision whether to place a bid for a project or to pursue the public private partnership to begin.