As policy problems have become more complex. policy researchers have tried their best to result in thoughtful policy decisions and valuable policy knowledge. To promote the capacity of state’s competitiveness, this policy knowledge should be used and diffused.
Regardless a growth in the volume of policy knowledge in the past decades, most research indicate that governmental policy-makers did not make direct use of policy knowledge. To an extent, policy knowledge only changes policy-makers' conceptualization of policy problems.