When Elizabeth Warren arrived in Austin to teach law school at the University of Texas in the 1980s, colleagues say she was nothing close to the unapologetic progressive firebrand voters see today.

"She was quite consistently pro-business," said Calvin Johnson, who taught law school with Warren at the University of Texas. "And I'm sure she would not like to be called 'anti-consumer,' " he added. But, in his view, the future Massachusetts senator was "absolutely anti-consumer" on some positions at the time.

Johnson, who commuted to work with Warren and her husband, Bruce Mann, for about six months in 1981, recalls one particularly wonky issue they would debate on their car rides: public utility accounting.

"I was very strongly of the opinion that (the accounting methods were) giving excessive profits to the public utilities and, in fact, truly abusing the ratepayers," said Johnson, who has long considered himself a liberal Democrat. "She came out very strongly in favor of business industry (and) the utilities."

Through interviews with former colleagues and students, it's clear Warren arrived in Austin a moderate economic conservative, perhaps not an overtly political one, but a conservative nonetheless. She left far more ideologically confused. Perhaps more than any other time period in her life, the years Warren spent in Texas planted the seeds of her political identity. The message she espouses on the presidential campaign trail now about a shrinking middle class comes directly from the research she conducted on bankruptcy that began roughly 40 years ago in Texas.

For years, Warren was a Republican; she registered to vote as a Democrat in Massachusetts in 1996, according to the Massachusetts elections commission. She told Politico in an interview earlier this year that she assumes 1996 was the first time she registered as a Democrat; but she doesn't recall voting for a GOP presidential nominee, with the exception of Gerald Ford in 1976.

Warren's evolution was ideological before it was political.

Some of her former colleagues in Austin recall Warren as a "moderate" but a moderate conservative — not driven by social issues, but by economic concerns. They found her smart and full of unlimited amounts of energy, but they also found some of her ideas peculiar.

"I found Elizabeth to be, in some ways, off-putting," said Tom McGarity, a fellow University of Texas law professor, who describes himself as a longtime progressive. "She was really into this 'law and economics movement' where we assume that everybody is a rationale economic actor, markets are the best way to go, and we should keep government out of business," he added.

Law and economics was a movement popularized by the legal academic Henry Manne that swept through universities in the 1980s thanks to financial backing from conservatives. Supporters say the movement was a benign attempt to incorporate economics into the study of law. Critics say it was trying to proselytize professors.

Either way, according to former colleagues, Warren was a believer.

"On the lookout for cheaters and deadbeats"

The early 1980s was also when Warren became increasingly interested in bankruptcy.

In 1978, Congress had passed a new bankruptcy code.

"There was an enormous amount of contention over the new code," said Jay Westbrook, Warren's longtime research collaborator and co-author from the University of Texas.

Creditors suggested that people were intentionally avoiding their debts. "There was a lot of conjecture," said Catherine Nicholson, one of Warren's former research assistants. "There was really no hard data on why people filed for bankruptcy."

Warren wanted details.

"I might not have said so at the time, but I think I was on the lookout for cheaters and deadbeats as a way to explain who was filing for bankruptcy," she wrote in her memoir, A Fighting Chance.

Her attitude sounded Reagan-esque, but there was also a curiosity driving her.

"I wanted to believe that everyone who filed had done something terrible or stupid or had lazed about and never tried to make anything of themselves. I wanted to know that the work-hard-and-play-by-the-rules people might not get rich, but they didn't need to be afraid," she wrote.

In essence, she wanted to believe that the people filing for bankruptcy were different from her or her family.

So, Warren, along with Westbrook and Teresa Sullivan (who went on to become the president of the University of Virginia), conducted a massive multistate study called the Consumer Bankruptcy Project to figure out who was filing bankruptcy and why.

They traveled across Texas and visited Pennsylvania and Illinois to sift through bankruptcy files.

"This is back when it was all paper," said Kimberly Winick, one of Warren's former research assistants. "And we'd show up with a portable copying machine; it rolled like a rollerboard suitcase. And you get it there with reams of paper and start copying."

The team was looking for answers to specific questions, such as: Was the debtor employed? What kinds of debt did they have? Had they run up massive credit card debt? Did they have medical bills? Had there been a recent divorce in the family?

"This was an empirical study" said Winick. "I mean that is how she works — ask a question that's a clean question and then get an answer."

In addition to working for Warren, Winick took three classes with her.