Howlett, Michael, and Jeremy Rayner. “Patching Vs Packaging in Policy Formulation: Complementary Effects, Goodness of Fit, Degrees of Freedom, and Feasibility in Policy Portfolio Design”. Annual Review of Policy Design, vol. 1, no. 1, Sept. 2013, pp. 1-19, https://ojs.unbc.ca/index.php/design/article/view/535.