The science
of a good run.
Five reports on what makes pickup work: the geography of participation, the collapse of the third place, and the math of getting eight adults to the same court on Tuesday.
The Third Place, Collapsed
American adult participation in unstructured physical recreation has declined 47% since 1990. This paper documents the collapse — closed community centers, privatized courts, gated fields, the shift from public to pay-to-play — and identifies the specific policy and land-use decisions that produced it.
The Coordination Cost
Why do most "let's play" text threads die? A study of 400 group chats across five metros shows the median dead thread carries 18 messages, 4 potential participants, and never converges on a venue. Analyzed with an information-theoretic model of coordination collapse.
Court Density and Neighborhood Cohesion
Cross-sectional analysis of 200 U.S. neighborhoods finds that outdoor court density per 1,000 residents correlates 0.42 with self-reported neighborhood cohesion — controlling for income, density, and racial demographics. Not causal, but suggestive: the courts you can walk to matter.
The Pickleball Displacement Wars
Documents 340 conflicts between tennis and pickleball players over shared court time 2022-2025. Analyzes the underlying question — who gets the court, who decides — and proposes a fairness framework for municipal parks departments.
Skill Sorting Without Leagues
Pickup, by definition, has no draft. How does skill sort in a self-organizing system? Analysis of the "winners stay, losers rotate" convention and its variants across sports. Includes a mathematical model of how skill differentials resolve without explicit ranking.