from The Century Dictionary and Cyclopedia
- Born later; younger.
Sorry, no etymologies found.
Dissidents, malcontents, criminals (remember I live in Georgia,) religious zealots, latter-born sons powerless in the face of primogenitor and just plain folks desperate enough to try to start all over.
The results of the study were that if Mary was a first-born, she gave $3.7 less money to Sally than if she was a latter-born actually, the game used "monetary units," not dollars, so it's not clear how this translates.
Invest $30 with a latter-born, and in the end you'll have $47, and s/he will have $73 -- better than if you invest with a first-born $36.7 and $83.3, but still unfair.