A SEP IRA (Simplified Employee Pension) is a retirement plan that is popular with many small business owners and self employed individuals. The 2015 SEP IRA contribution limit is $53,000 (the 2014 SEP limit is $52,000).
Meanwhile, other studies suggest that another gene, DRD4, may also play a role in traits such as shyness and anxiety. The DRD4 gene codes for a protein that binds dopamine, another chemical messenger that has powerful effects in the brain. Again, the DRD4 gene comes in two forms: a long and a short version.
However socialization and other environmental factors interact with genetics, so genes are not the only determinant in whether one has psychopathic traits. Studies on the heritability of psychopathy have focused primarily on identical twins (100% shared genes) and fraternal twins (50% shared genes).aldman, I.D. & Rhee, S.Y. (2007). Genetic and environmental influences on psychopathy and antisocial behavior. In C.J. Patrick (Ed.), Handbook of Psychopathy (pp. 229-250). New York: The Guilford Press.