Part of the cost factor is that it's pretty easy to find (even quite good) gas stoves on the used or factory dent-n-ding market. Electric, even easier. Induction, not so much. That can mean in effect 4x or more the price, for a similar-quality stove (effects on air quality aside).

Retail prices do also seem to be somewhat more expensive at similar feature/"trim" levels, too. Unless that's changed since the last time I was thinking about this (maybe a year ago).