In my experience (in a different field), it is common for researchers to acknowledge the source of their funding. In particular, researchers are keen to acknowledge funding from government grants, as this is perceived to be helpful in applying for future research grants.

I glanced through the paper and I could not find any mention indicating who funded that study.

I'm also very sceptical of single studies that support the status quo for very large industries -- even more so when there is no indication of who funded the study.