Aeconomy usually stresses the equality of all citizens. a economy aims to be self-sufficient. a economy relies more on bartering than money. in a economy, private businesses are encouraged.

A social market economy usually stresses the equality of all citizens. A Laissez-faire economy aims to be self-sufficient. A Barter economy relies more on bartering than money. In a market economy, private businesses are encouraged.

Barter economies were the first to develop followed by the other types of economic systems.

answer; (b) binge eating disorder;

answer:

d. because dr. laguardia selected a widely used measure, his study generalizes to has strong external validity. external validity has limited external validity. other applications of this measure.

the widely used measure that he applied to his experiment was the benton facial recognition test. it employed on to football players and as result, only players who suffered brain concussions did not pas this test. and although it has an external validity, it is limited because it isn't general to apply to other population.