CCP member John Gasitil, along w/ co-authors, has a new article out presenting evidence that highly participatory forms of democratic deliberation promote a distinctive shared identity that transcends more particular and potentially divisive ones, such as those founded on cultural affiliations.
The analysis was largely qualitative: a case study based on impressionistic analyses of transcripts from citizen deliberations associated with the Australian Citizens' Parliament. I know JG has more data on the Australian Citizens' Parliament, including some that admit of more systematic analysis, in hand. Good way to do research since the convergence of results from more interpretive forms of empirical analysis and more quantitative -- if they do indeed converge! -- make the conclusions of both more worthy of being credited.
I know from experience that collective deliberations on baseball are not sufficient to enable Gastil to transcend his partisan cultural identity as a Tigers fan.