An evidence of frame building: Analyzing the correlations among the frames in Sierra Club newsletters,national newspapers,and regional newspapers

Based on the data reported in a published article, this study finds that the percentages of articles that have particular frames in Sierra Club newsletters correlate with those in national and regional newspapers. Partial correlation analysis also reports such a correlation between the national newspapers and the regional newspapers, which disappears when the Sierra Club newsletters are controlled. Moreover, the correlation between the newsletters and the newspapers exists when the pro-environment master frames are analyzed, but not when the pro-development competing frames are analyzed.