Wai, Jonathan Cacchio, Megan Putallaz, Martha Makel, Matthew C. (July-August 2010). "Sex discrepancies in the appropriate tail of cognitive capabilities: A 30 12 months assessment". Wai, Jonathan (July-August 2013). "Investigating America's elite: Cognitive capability, schooling, and intercourse dissimilarities". Belgium switched to the euro in 2002, with the initial sets of euro coins getting minted in 1999.