Empirical Creative was paid about $300,000, the people familiar with the situation say, for services that included a mock trial, during which his lawyers employed two main defense themes: that the information prosecutors said involved illegal inside tips was already public, and that the government’s witnesses weren’t credible. During the mock trial, the consultants discovered, the jurors most receptive to those themes were those without advanced-education degrees or financial sophistication and with relatively low- to middle-income jobs. Mock jurors who were members of ethnic minority groups also were more sympathetic to Mr. Rajaratnam, who was born in Sri Lanka, their research found, according to the people familiar with the situation. The real jury reflected those findings in many respects. [WSJ]