Collective Decisions.

Estimate a team's private support, then reveal the anonymous preference poll.

A team publicly agrees to a trip that every member privately opposes.

Divide a shared surplus by inspecting every joining order.

Change the quota and compare vote weight with pivotal power.

Report a benefit, fund a project and inspect the pivot payments.

Assign a noise right and test whether a voluntary bargain changes the outcome.

Add voters and test what happens when they share the same signal.

Swap households between two towns and compare service fit with the cost of moving.

Compare equal-size row and column districts, then edit the voter geography.

Compare population sizes and well-being under total and average evaluations.

Change whether a policy affects the same future person or who comes to exist.

Allocate resources under an extreme utility scale and inspect what total maximisation permits.