The process through which cases are selected for litigation cannot be
ignored because it yields a set of lawsuits and plaintiffs that is far
from a random selection either of potential claims or of potential cl
aimants, We present a theoretical framework for understanding the oper
ation of this suit-selection process and its relationship to the under
lying distribution of potential claims and claimants, The model has im
plications for the trial rate and the plaintiff win rate at trial. Our
empirical analysis, using data on over 200,000 federal civil litigati
ons, yields results that are strongly consistent with the theory.