His second book, The Supreme Court was also published by Cambridge University Press in the Political Economy of Institutions and Decisions.
[10] That book builds on a series of articles Clark published with Benjamin Lauderdale that proposed models for measuring ideology from voting behavior.
Clark and Lauderdale develop statistical models of judicial ideology that incorporate the content of the law that judges decide on.
In the book, Clark examines how the broader political climate frames legal issues and shapes the coalitions that emerge among the justices.
Along with Barry Friedman, Margaret Lemos, Andrew D. Martin, Anna Harvey, and Allison Larsen, he co-authored a textbook on the subject of judicial decision-making, published by West Academic.
He has an on-going, collaborative research project documenting the patterns in police shootings across American cities.