When Do Plans Matter?

Lu Liao, Mildred E. Warner and George C. Homsy

Journal of the American Planning Association, 2020, vol. 86, issue 1, 60-74

Abstract: Problem, research strategy, and findings: Plans often sit on the shelf and fail to promote action. This raises the question of how and when plans matter. This is especially important in sustainability planning where local governments are more likely to take actions with short-term benefits that are easy to adopt. How can planners promote more sustainability actions, especially those with longer term benefits? In this study we examine factors influencing local sustainability actions by tracking 651 U.S. local governments’ adoption of 34 sustainability actions from 2010 to 2015. We differentiate places that recently adopted a sustainability plan from those that have had a plan for a longer period and those that have never adopted a sustainability plan. We use difference-in-difference (DID) modeling to assess what effect plans have on the level of sustainability actions. We find a plan may have its greatest effect in motivating actions when it is newly created. Places that adopted a plan between 2010 and 2015 exhibited a significant increase in sustainability actions during those same years. By contrast, places that already had a plan in 2010 showed higher initial levels of sustainability actions but did not show a higher level of growth in the number of actions adopted compared with places without plans. In general, we find local governments with higher levels of sustainability actions articulate social equity goals, devote staff and budget resources to the effort, engage the public, and promote interdepartmental coordination. Local governments under Republican control enact fewer sustainability actions.Takeaway for practice: Sustainability plans are most effective in spurring local sustainability actions when they are newly created. However, this initiation impact in motivating actions wanes over time. Promoting continued adoption of sustainability actions requires a comprehensive approach with attention to political support, public participation, social equity, interdepartmental coordination, and local capacity.

Date: 2020
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DOI: 10.1080/01944363.2019.1667262

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