"Tourists tend to be fickle and nervous," said Matthew Brooks, the head of industry analysis at Business Monitor International, a research firm that specializes in emerging markets.
Jami Miscik, leading a review of American intelligence agencies, was the head of intelligence analysis at the Central Intelligence Agency during its biggest embarrassment: the botched assessments about Iraq's weapons of mass destruction.
But voices as varied as those of Mohammad Alipour-Jeddi, the head of market analysis for OPEC, and William F. Galvin, the secretary of state in Massachusetts, have blamed speculators for rising prices.
The head of economic analysis at Which?, Matt Oakley, said: "We've found that throughout the financial crisis and coming out the other side of it, even though growth is returning people are still worried about their household situation.
Mr. Allen learned about the case while investigating the work of James Bolding, the head of blood analysis for the Houston Police Department's crime lab at the time, who testified at Mr. Hughes's 1989 trial.
"The local partner brings the market access and the foreigner makes some money for a few years but ultimately it's kind of open season," said Andrew Gilhom, the head of Asia analysis at Control Risks, a business risk consulting firm.
Yet, according to Fatih Birol, the head of economic analysis at the International Energy Agency, the high proportion of taxes in the pump price of Europe's gasoline effectively fixes so much of the price of gasoline that consumers are cushioned from the wild price swings Americans have seen this year.
As Kevin Trenberth, the head of climate analysis for of the National Centre for Atmospheric Research, explained: There is a systematic influence on all of these weather events nowadays because there is more water vapour lurking around in the atmosphere than there used to be, say, 30 years ago.
"If Turkey fails to deliver, Europe's next course of action will be to turn Greece into a de facto refugee camp by sealing the border on the Macedonia side," says Mujtaba Rahman, the head of European analysis at Eurasia Group, a risk consultancy.
