These results held even after controlling for income, age, gender, education, industry, employer type, firm size, and firm revenue.

即使在控制了收入、年龄、性别、教育、行业、雇主类型、公司规模和公司收入之后，这些结果仍然成立。

He sat in thousands of parlors, asking questions about age, gender, education, literacy, occupations, earnings, crime, and documented the ways in which African-Americans differed from Philly’s white residents.

他坐在成千上万的客厅里，询问有关年龄、性别、教育、文化、职业、收入、犯罪的问题，并记录了非裔美国人与费城白人居民的不同之处。