“Signs of the energy business are inescapable in and around Houston — the pipelines, refineries and tankers that crowd the harbor, and the gleaming office towers where oil companies and energy traders have transformed the skyline.

“And in a squat glass building on the University of Houston campus, a measure of the industry’s pre-eminence can also be found in the person of Craig Pirrong, a professor of finance, who sits at the nexus of commerce and academia.

“As energy companies and traders have reaped fortunes by buying and selling oil and other commodities during the recent boom in the commodity markets, Mr. Pirrong has positioned himself as the hard-nosed defender of financial speculators — the combative, occasionally acerbic academic authority to call upon when difficult questions arise in Congress and elsewhere about the multitrillion-dollar global commodities trade.”

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