For anyone as obsessive about 1978 Topps as I was as a kid, you may enjoy my latest article just posted to the SABR blog.
https://sabrbaseballcards.blog/2019/...978-topps-set/
And if you want to skip the reading and simply do your own analysis of 1978 Topps Play Ball data, I've made the data set available to the public as well.
https://docs.google.com/spreadsheets...9cU/edit#gid=0