To complete payments, do you think people need more or less currency per dollar of transactions than they did 30 years ago? After stating your hypothesis, plot currency in circulation as a percent of GDP from 1990 (FRED codes: CURRENCY and GDP). 
Was your intuition consistent with the data? 
What might account for the trend you observe?

Answer rating: 100% (QA)

Hypothesis People may need less currency per dollar of transactions than ... View the full answer