Mr. Staller opened the center in 1980 with Bernard Siskin, his former statistics professor at Temple University.
Mr. Staller was a senior economist with the U.S. Department of Labor in the late 1970s, when Siskin asked him to help analyze liability and damages in a case involving discriminatory hiring practices.
Chad Staller said that among the cases to which the firm contributed was the settling of the estate of Jessica Savitch, the Philadelphia television anchor who died in a 1983 car accident near a New Hope restaurant.
With Siskin and David Rorvik, Mr. Staller wrote What Are the Chances: Risks, Odds and Likelihood in Everyday Life, published in 1989.
A Philadelphia native, Mr. Staller graduated from Central High School in 1963 and earned a doctorate in economics at Temple University.
He was an adjunct professor at Temple's law school and lectured annually at the law school of Villanova University.
Besides his son, Mr. Staller is survived by his wife, Michele; a daughter, Shara Rich; his mother, Irene; and two grandchildren.
A funeral service was held Sunday.
Contact staff writer Walter F. Naedele at 215-854-5607 or firstname.lastname@example.org.