Gina Kolata, “Arthritis surgery in ailing knees is cited as sham”, New York Times, 11 jul 2002. Benedict Carey, “Long-awaited medical study questio...

Gina Kolata, “Arthritis surgery in ailing knees is cited as sham”, New York Times, 11 jul 2002. Benedict Carey, “Long-awaited medical study questions the power of prayer”, New York Times, 31 mar 2006. Diane Whitmore Schanzenbach, “What have researchers learned from project STAR?”, Harris School Working Paper, ago 2006. Gina Kolata, “A surprising secret to a long life: stay in school”, New York Times, 3 jan 2007. Adriana Lleras-Muney, “The relationship between education and adult mortality in the United States”, Review of Economic Studies 72, n.1, 2005, p.189-221.

a) Não há uma pergunta clara para extrair uma questão válida.