About the lab

We study how people’s ties to one another and to political life hold, loosen, and change.

What we ask

01  ·  Over time

Cohorts and social change

Over time, which divides narrow across cohorts and which widen?

Among Americans born across the twentieth century, for which issues and groups has social change continued or stalled?

How much of the change across American cohorts reflects shifts in who makes up each cohort?

In Canada and France, how do later cohorts differ from earlier ones in their confidence in democratic institutions?

Project spotlight

Whither the Progressive Revolution? The Structure of Attitudinal Change in the United States across Cohorts, 1900–2000

We compare Americans born from 1900 to 2000 on more than 100 General Social Survey questions, from civil liberties and race to abortion and gender roles. Trends across survey years understate how much cohorts differ, and change across cohorts slowed among those born after World War II before picking up again among those born from 1970 to 1990.

American attitudes are still liberalizing across cohorts. Where change has stalled or reversed, it has done so among later cohorts rather than through a backlash among older or less educated Americans, and the strongest divide has moved from race to party.

Life-cycle and social-change models · Generalized additive models · Population decomposition

Student collaborators Tom Chen · Andraya Gallant

02  ·  Among people

Social ties and belief systems

Among people, which connections bridge divides and which deepen them?

In informal discussion networks, how effective is strategic framing at building consensus?

In the Atlantic provinces, which positions are most connected to the others, and which divide citizens and parties?

In France, how does confidence in different institutions relate to approval of alternative forms of government?

Project spotlight

Framing Effects in Informal Communication Networks and the Problem of Embeddedness

Fedor A. Dokshin and Sébastien Parker · Social Psychology Quarterly, 2026

Framing is a common recommendation for building consensus on issues such as climate change, but most of the evidence comes from survey experiments that leave out who is talking and to whom. In an agent-based model of informal discussion networks, framing moves opinion far less once people talk mostly within their own party or can push back against the other side, and under partisan homophily it can widen the gap between parties as one party’s members persuade one another.

In the model, fostering discussion across party lines, or making party identities less salient, shifts opinion at least as much as having more people use a frame, and does far more to reduce polarization. Campaigns that succeed with framing may owe it less to the frame than to reaching people beyond these networks.

Agent-based models · Graphical models · Measurement models

Student collaborators Ana Brinkerhoff

03  ·  Across places

Places and public voice

Across places, who engages in democratic processes, and whose voices are amplified or muted?

Across Canada, who feels heard in democracy, and what makes them feel that way?

In Montréal’s participatory budget, how do ideas for lower-income boroughs fare from proposal to funded project?

In France’s Grand Débat, who took part, and on whose terms were they heard?

Project spotlight

Included on Whose Terms? Citizen Voice in France’s Democratic Consultation

France responded to the Yellow Vest movement with the Grand Débat National, whose online platform let anyone who registered answer open questions, and the polling firm OpinionWay summarized the answers at the government’s request. I compare the categories of that official summary with the millions of answers it summarizes. About a third of the answers lie in groups of similar answers that its categories do not cover, and the official summary is closer than the average answer to a vocabulary of rules, implementation, and the allocation of resources. Where it differs from what contributors wrote, the difference points toward the answers from more advantaged départements, beyond each département’s share of the answers.

Who gets heard in a consultation depends not only on who takes part but also on how a summary prepared for those who govern differs from what contributors wrote. When a participatory or deliberative procedure ends in a summary, comparing that summary with what people said is a way to ask who gets heard after they have had their say.

Geocoded surveys · Small-area measures · Multilevel models · Computational text analysis

Student collaborators Lydia Doyle · Aidan Murphy · Kelly Tuttle · Maria MacKinnon

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