Lets start with Ryerson's Centre for Urban Research and Land Development which Mr. Clayton helped found. Check out the Founding Donors and Advisory Committee. Essentially,  a centre to produce and disseminate research on behalf of developers.          

http://www.ryerson.ca/cur/donors/   
http://www.ryerson.ca/cur/about/advisory/

As for Mr. Clayton: a long history of working for the Canadian Home Builders’ Association, the Building Industry and Land Development Association and consulting with a variety of developers as a consultant.  This information is divulged on his Ryerson website, but it should similarly be identified in any report. Readers should always know potential conflicts of interest. This would be consistent with a peer-reviewed publication in a respected journal.

https://www.elsevier.com/__data/assets/pdf_file/0010/92476/ETHICS_COI02.pdf
https://academic.oup.com/journals/pages/authors/authors_faqs/conflicts_of_interest

Any other questions Rochdale68?