Shoppers on Henry Street are outspending their southside rivals.
Consumers are forking out 84 euro during a shopping spree on Henry street while those on Grafton Street are spending only 57 euro.
The average spend across the city is 70 euro.
The study by the National Transport Authority also shows that 80 percent of shoppers are not relying on their cars to get into the city centre.
The increased spend on Henry Street is being put down to the fact that its much longer than Grafton Street and has more shops.
The highest spending happens between 12pm and 3pm.
