Who spent more money boys or girls?

Its definitly difficult to find a real answer for this one, and not just an opinion. :)

However, you'd have to find scientific proof and therefore someone would have to start a survey.

Things one might consider are:

How many girls/boys live in poor families?

How much do boys/girls spend on clothes?

How much do boys/girls spend on extra activities?

The answers to these questions would help give the answer to this question.

All in all many scientists would agree that Girls spend more than guys.