The economists Steven Levitt and John A. List long pursued without success a search for the base data of the original illumination experiments, before finding it in a microfilm at the University of Wisconsin in Milwaukee in 2011.
Majandusteadlased Steven Levitt ja John A. List üritasid kaua, kuid edutult leida esialgse valguskatse baasandmeid, kuni lõpuks leiti need mikrofilmilt Wisconsini ülikoolis Milwaukee's 2011. aastal.