Victorian Infanticide Rates?

Megan McArdle has some criticisms of a paper (seen via Crooked Timber) alleging that Victorian theocracy was responsible for the relatively-high rate of post-natal infanticide in 19th-century England. I have a few additional criticisms:

• Some of the usual complaints about the Victorian era (children working in “dark Satanic mills”) were due to a drop in the infanticide rate.

• The increasing population growth indicates a decline in the death rate. There was an apparent increase in the birth rate, which might have been due to a decline in infanticide.