ower ▁studies ▁populations ▁regarding ▁( for ▁example ) ▁number ▁of ▁birth s , ▁life ▁expect ancy , ▁public ▁health , ▁housing , ▁migration , ▁crime , ▁which ▁social ▁groups ▁are ▁over - re present ed ▁in ▁devi ations ▁from ▁the ▁norm ▁( reg arding ▁health , ▁crime , ▁etc .) ▁and ▁try ▁to ▁adjust , ▁control ▁or ▁eliminate ▁these ▁norm - de vi ations . ▁One ▁example ▁is ▁the ▁age ▁distribution ▁in ▁a ▁population . ▁Bi op ower ▁is ▁interested ▁in ▁age ▁distribution ▁in ▁order ▁to ▁compens ate ▁for ▁future ▁( or ▁current ) ▁la cks ▁of ▁labor ▁power , ▁ret irement ▁homes , ▁etc . ▁Another ▁example ▁is ▁the ▁French - Can ad ian ▁province ▁Québec , ▁which ▁has ▁had ▁a ▁high ▁interest ▁in ▁sust aining ▁the ▁French ▁language ▁in ▁the ▁region . ▁To ▁accomplish ▁this , ▁economic ▁in cent ives ▁has ▁been ▁created ▁for ▁French - spe aking ▁people ▁to ▁move ▁to ▁Québec , ▁and ▁non - F rench - spe aking ▁children ▁have ▁had ▁French ▁taught ▁as ▁a ▁comp uls ory ▁subject ▁in ▁school . ▁Yet ▁another ▁example ▁is ▁sex : ▁because ▁sex ▁is ▁connected ▁to ▁population - g row th , ▁sex ▁and ▁sexual ity ▁have ▁been ▁of ▁great ▁interest ▁to ▁bi op ower . ▁On ▁a ▁discipl inary ▁level , ▁people ▁who ▁engaged ▁in ▁non - re product ive ▁sexual ▁acts ▁have ▁been ▁treated ▁for ▁psych iat ric ▁diagn oses ▁such ▁as ▁" per version ", ▁" fr ig id ity " ▁and ▁" sex ual ▁d ys