Public contestation over agricultural pollution: a discourse network analysis on narrative strategies in the policy process.

Simultaneously, we should observe an increasing trend in both ratios for the reform coalition.

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To investigate these expected changes, time series of coalitions’ contain-expand ratios were tested for statistically significant trends using Mann–Kendall Trend Tests , where a positive trend indicates an increasing level of containment (or decreasing level of expansion) and a negative trend an increasing level of expansion (or decreasing level of containment).

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With increasing likelihood for the adoption of stricter fertilizer regulation, we can expect a decreasing trend for the status quo coalitions’ ratio of containing to expanding frames and in their ratio of heroes to villains.

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