Dear Friend kindly suggest me Phd finance topic(up)

Okay, the topic I'm about to suggest is close to my heart and current (as far as I'm concerned).

Coppers: An investigation into why Australia has gotten rid of 1 and 2 cent coins.

I'd like you to research the advantages and disadvantages of this measure, then kindly suggest whether they should bring the coins back or not.

thanks i will really consider it