I encountered a sentence in a paper.
Stock-market participation has also been found to be increasing in household education. One interpretation is that education reduces the fixed costs of participating, by making it easier for would-be investors to understand the market’s risk–reward trade-offs, to deal with the mechanics of setting up an account, and executing trades, etc.
While it's well known that a lot of scholarship is produced by non-native English speakers in the academia, this paper was penned by people who appear to be native speakers. (I could include the title and the authors' names if necessary).
I thought it should be increasing with, because it seems the authors are saying stock-market participation increases as household education increases. Googling "increasing in" only gives me results along the lines of "Antibiotic use is rapidly increasing in developing countries." Is the original sentence correct?