The poll, taken June 9-July 13, also examined the effect of race in the 2008 election.

CNN: Poll: 'Sharp reversal' for Obama with Latino voters

Dr Feher and his colleagues examined the effect of two chemotherapy drugs - epirubicin and gemcitabine - on women aged 60 years and older.

BBC: Cancer care 'ageist'

Dr Duif has examined various conventional explanations for the Allais effect.

ECONOMIST: Gravitational anomalies