Dr. Hopkins, though, stands behind the study.
But Dr. E. William Colglazier, the academy's executive officer, said the academy stands behind the study.
The scientific hypothesis behind the study, the latest in a growing number examining the effects of biodiversity, is simple.
The chances of them doing so are 5 in 10,000, the scientists behind the study claim.
Or, as Professor Gregory Clark and Dr Neil Cummins, the two economists behind the study, explain: "To those who have, more is given".
Still, the researchers behind the study said the Valley was distinguished by the flexibility of its economy and its ability to adapt to changing conditions.
Luisa Corrado, an Italian economist, led the research behind the study at the University of Cambridge that found Italians to be the least happy of 15 Western European nations.
Henry Northover, head of policy for WaterAid, the organisation behind the study, said the global water and sanitation crisis was not a problem of limited supplies.
The team behind the study set out to pin-point why certain foods are more addictive than others.
The team behind the study, which appears in the journal Nature today, hopes to unravel all 3 billion base pairs of the Neanderthal genome within two years.
But the Countryside Alliance, an umbrella organization for hunting advocates and groups that champion rural causes, questioned the science behind the study.
