How does relationship is effected if girl is earning more than boy

well, it depends on the "ego level" of the man. i have seen relations breaking only due to the reason u stated above. even one husband left her wife in her house n refused to allow her again to enter his house till she leave her job. n know what, she left her job!

I think EGO's really exist with that kind of situation. Ego's comes with Pride, coz in our society all men should be the provider of the family. But not in all cases are like that. Some wife becomes the provider coz of her husbands status. I know some are like that but their family are still intact. It's just how the couple handles the situation. Love and understanding is the key for that situation.

every time when the girl earns more then the boy than problems come because either it is the boys ego which comes on the way or the girl becomes proud that she is earning more and is handling the family.. so it cant be said who is the root cause it can be any of the two

It doesn't need to be an issue. I make more than my husband - by quite a large amount actually. It isn't an issue in our relationship. We don't look at it as "my money" and "his money", its our money. We have a joint account and both of our paychecks go into that account. We talk to eachother before we make large purchases and it is never "well you didn't make enough to afford that" its "we don't have the money for it right now." It wasn't an issue when we were dating either. He knew I made more than him, but I never told him how much. He didn't know how much I actually made until just before we got married.