But establishing protocols, while an important step, will not be sufficient to end the harmful rivalry between the Police and Fire Departments and the wasteful duplication of resources it encourages.
While both parents acknowledged that Michael was deeply hostile to the new baby, sibling rivalry didn't seem sufficient to explain his consistently extreme behavior.
Subjects who did display stable patterns of rivalry but lacked a sufficient number of stable percepts for analysis were asked to return for a second, and if necessary, third recording session.
Sufficient conditions for stable Hopf bifurcation to learned pattern rivalry are given by (18) and g > w − δ + β G ′ > 1 w − δ + β (19).
Males need to maintain a sufficient energy level to respond to the challenges of reproductive competition for much longer (i.e. endurance rivalry, Andersson 1994) and thus cannot afford to completely deplete their energy reserves.
A member of the Mara Salvatrucha, identifiable by his tattoos, crosses paths with someone from the 18th Street, and that is sufficient to start a fight to the death--even though neither knows what the rivalry is about.
