I am a social scientist and I was reading "The political economy of hybrid corn" by Jean-Pierre Berlan and Richard Lewontin.
They claim that the R&D cost for inventing hybrid corn was much higher than the mass selection of corn varieties (Mendelian selection scheme). One reason hybrid corn was adopted was that farmers had to revisit the seed seller every year to maintain their corn yield because the second generation hybrid corn is much less productive, while the selection of a new productive corn variety will make the seed company obsolete once the productive crops are distributed. It was claimed that Henry A. Wallace, the founder of hybrid seed selling company and the son of Secretary of Agriculture Henry C. Wallace, pushed for hybrid corn at the expense of using Mendelian scheme.
I was wondering if there is any academic article or experiment result that compare the productivity hybrid corn versus corns that were developed by "Mendelian selection scheme."