Placeholders with the same text as the label – good practice?

I have a form such as the following, in which the placeholders have the same exact text as their corresponding labels:

The alternative being leaving each input without any placeholder. I'm not discussing labels vs. placeholders. The labels will stay regardless of the labels!

It seems to me that these seemingly redundant placeholders are actually useful, to some degree and to some people. It can save the user from looking at the left to remember which input was he filling (likely in lengthy forms)

I don't see any harm in putting them as the visual impact is very little.

Is there established practice on whether redundant placeholders are helpful/harmful?