Of all the inane research topics to waste resources on....

It depends how one defines "Better at shopping" or "successful" at
shopping.
Sure if we talk about mundane issues like time efficiency, cost
minimisation, the men win.
But that's Buying, a transaction of exchanging money for goods.
It's missing the bigger picture, the whole point of shopping.
When it comes to enlightened emotions like satisfaction ,
enthsiasm, the art and enjoyment of shopping, the pure love and
appreciation of the retail experience - women have perfected it and
revel in it.
But this is a totally useless argument. I know of men who love
shopping and women who hate it.
It's all
good, as long as nobody stops me from getting to the shops.