Anew pair of shoes costs $50. in this case, money is a _

A medium of exchange.

Explanation:

One of the fundamental functions of money in mainstream economics is being a medium of exchange, in opposition to being a common measure of value, a standard of deferred payment), or a store of value.

Money is a medium of exchange because it´s widely accepted that can be traded for goods and services.

john maynard keynes developed new economic theories in response to the : b) great depression of the 1930s. his theories are so important that they are known as "keynesianism". in his works he supports the idea of a government with deeper involvement and intervention to end the great depression.

it broke up the ottoman empire (just a small fact) and the turkish leaders lost many soldiers.