As the countries become relatively poorer and there is less of a surplus for the ruling classes, there is a tendency for them to resort to other forms of manipulation of the people. (religion-online.org)
I've seen almost all forms of manipulation at this stage in my career. (abnormalreturns.com)
Many studies starting from toddlers into school age children show that giving rewards or some kind of manipulation in behavior are rarely successful at producing children that are «more helpful». (familycontinuum.com)