Has anyone done any studies on the effect of the change at HN? Ir seems like it would be a really rich dataset. On the simple side of the analysis is simply wh

Has anyone done any studies on the effect of the change at HN? Ir seems like it would be a really rich dataset. On the simple side of the analysis is simply what it did to the vote counts. Did they stay the same, or go down? What happened to the ratio? On the more complex side you could do some semantic analysis to see if the comments have changed in character at all.