▁ 2 0 0 8 - 2 0 1 0 ▁ ▁President , ▁National ▁Association ▁for ▁Business ▁Econom ics ▁( N AB E ), ▁ 2 0 0 7 - 2 0 0 8 ▁ ▁Member , ▁Cong r essional ▁Bud get ▁Office ▁Ad vis ory ▁P anel , ▁ 2 0 0 5 - 2 0 0 7 ▁ ▁Member , ▁Indust rial ▁Econom ists ▁Disc uss ion ▁Group ▁( Har vard ) ▁ ▁Chair , ▁Board ▁of ▁Direct ors , ▁Operation ▁AB LE , ▁ 2 0 0 7 - 2 0 0 8 ▁ ▁Member , ▁American ▁Econom ic ▁Association ▁ ▁References ▁▁ ▁Category : L iving ▁people ▁Category : 2 0 th - century ▁American ▁econom ists ▁Category : 2 1 st - century ▁American ▁econom ists ▁Category : American ▁women ▁econom ists ▁Category : Cl ark ▁University ▁al umn i ▁Category : Year ▁of ▁birth ▁missing ▁( l iving ▁people ) <0x0A> </s> ▁The ▁study ▁of ▁hom osex ual ity ▁in ▁Mexico ▁can ▁be ▁divided ▁into ▁three ▁separate ▁periods , ▁coinc iding ▁with ▁the ▁three ▁main ▁periods ▁of ▁Mexican ▁history : ▁pre - Col umb ian , ▁colonial , ▁and ▁post - in dep end ence , ▁in ▁spite ▁of ▁the ▁fact ▁that ▁the ▁re jection ▁of ▁hom osex ual ity ▁forms ▁a ▁connecting ▁thread ▁that ▁cross es ▁the ▁three ▁periods . ▁ ▁The ▁data ▁on ▁the ▁pre - Col umb ian ▁people ▁and ▁those ▁of ▁the ▁period ▁of ▁colon ization ▁is ▁scar ce ▁and ▁obsc ure .