ity ", ▁" con vex ▁programming ", ▁and ▁" st ochastic ▁optimal ▁control "). ▁ ▁A ▁widely ▁used ▁system ▁in ▁econom ics ▁that ▁includes ▁mathematical ▁methods ▁on ▁the ▁subject ▁is ▁the ▁J EL ▁classification ▁codes . ▁ ▁It ▁origin ated ▁in ▁the ▁Journal ▁of ▁Econom ic ▁Liter ature ▁for ▁class ifying ▁new ▁books ▁and ▁articles . ▁The ▁relevant ▁categories ▁are ▁listed ▁below ▁( sim pl ified ▁below ▁to ▁o mit ▁" M is cell aneous " ▁and ▁" Other " ▁J EL ▁codes ), ▁as ▁reprodu ced ▁from ▁J EL ▁classification ▁codes # Math emat ical ▁and ▁quant itative ▁methods ▁J EL : ▁C ▁Sub categories . ▁The ▁New ▁Pal gra ve ▁Dictionary ▁of ▁Econom ics ▁( 2 0 0 8 , ▁ 2 nd ▁ed .) ▁also ▁uses ▁the ▁J EL ▁codes ▁to ▁class ify ▁its ▁entries . ▁ ▁The ▁corresponding ▁foot notes ▁below ▁have ▁links ▁to ▁abstract s ▁of ▁The ▁New ▁Pal gra ve ▁Online ▁for ▁each ▁J EL ▁category ▁( 1 0 ▁or ▁fewer ▁per ▁page , ▁similar ▁to ▁Google ▁searches ). ▁ ▁J EL : ▁C 0 2 ▁- ▁Mathemat ical ▁Method s ▁( follow ing ▁J EL : ▁C 0 0 ▁- ▁General ▁and ▁J EL : ▁C 0 1 ▁- ▁E con omet rics ) ▁ ▁J EL : ▁C 6 ▁- ▁Mathemat ical ▁Method s ; ▁▁ ▁Program ming ▁Mod els ; ▁Mathemat ical ▁and ▁Sim ulation ▁Model ing ▁ ▁J EL : ▁C 6 0 ▁- ▁General ▁J EL : ▁C 6 1 ▁- ▁Opt