For more than 50 years, Henry Groppe Jr. and his firm, Groppe, Long & Littell, have studied the minutia of global oil supply and demand. More than once, they have gained notoriety for calling a new direction in oil prices that flew in the face of the consensus. For that, they have gained the loyalty of long-time clients that include major oil and gas companies, independents, chemical and refining companies, financial institutions and governments.
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