One drawback of voluntary trade is that it
requires two groups to use a common language
can make one group dependent upon another for necessary goods
doesn't occur unless there is a shortage of goods for at least one group
forces groups to rely on themselves to produce all the goods they need
requires two groups to use a common language
can make one group dependent upon another for necessary goods
doesn't occur unless there is a shortage of goods for at least one group
forces groups to rely on themselves to produce all the goods they need