An earlier Skeptics Stack Exchange question asks: If you shave or wax, will the hair grow back stronger or thicker?
However, I am interesting in a more specific claim: that shaving the head of an infant will lead to thicker and stronger hair later. For example, this is discussed at babycenter.com.
Does shaving of hairs of an infant really promote hair growth and better quality new hair?
The BMJ web-site reports an answer for adults, but I have been unable to follow the references to see if they are applicable to infants.
Many of the comments give reasons that the hair is dead and, hence, it does not matter whether you cut it or not, but I see there are many confounding variables e.g. the weight of hair may have some effect on the follicle. The weight reduction is more prominent in infants. Also, the pulling action affects the delicate hair follicle of infants.