Columbia also declined to discuss the investigation. “We do not comment on personnel matters, but we can confirm that Professor Venkatesh is a faculty member,” a spokesman for the university said.

That discretion is common among prestigious schools, but Anne D. Neal, president of the American Council of Trustees and Alumni, an organization that focuses on accountability in higher education, said it was hazardous. “The university should always err on the side of transparency and being open,” she said. “Without knowing all the facts here, if Columbia wants to maintain donor and public trust, it shouldn’t hide the investigation or the findings.”

BORN in India and raised in an upper-middle-class suburb in California, Sudhir Venkatesh earned a bachelor’s degree in mathematics from the University of California at San Diego, then pursued graduate studies at the University of Chicago, where he encountered one of the great pillars in American academia: the Chicago school of sociology.

He signed on for a research project led by William Julius Wilson, a pre-eminent scholar of race and poverty, for which Professor Venkatesh says he approached strangers, questionnaire in hand, and asked, “How does it feel to be black and poor?” (Possible answers: very bad, somewhat bad, neither bad nor good, somewhat good, very good.) But he quickly came to see the folly of this approach, he has said, and ditched the questionnaire in favor of just spending time with his subjects, time that rolled on into years, as he tried to learn about their lives on their terms, not his.

The story, which he has recounted in two books and numerous speaking engagements, is a good one: it allows Professor Venkatesh to laugh at himself, yet also implies that he was more authentically engaged with poor black people than his professors were. But Professor Wilson, for one, was surprised when he read it. “I asked him one day: ‘Where did you get that questionnaire? I don’t remember ever giving you any questionnaire like that!’ And he said, ‘Well, it wasn’t yours.’ ”