Welcome to the Q&A Forum

Unfortunately not, due to issues with data integrity and seasonal variations in traffic. What I can say is that it did not have a catastrophic impact on our traffic. Google still indexed both versions of the webpages if it found them, and chose to display one or the other. Since we don't have a constant to compare it with, it's difficult to ascertain the exact impact it's having. I can say that the less competitive terms with lower traffic we're ranking for just fine, but we're on page five for the most competitive term (with the most volume) we're attempting to rank for, and both an http and https page are vying for position. That's in part the structure being an issue, and also in part the content on the page is thinner than I'd like it to be. If you run into this issue on specific pages, try adding a rel canonical tag to the page you want Google to rank. If you use this strategy only when you check your rank tracking tools to see which pages are in the SERP and having issues, you can cut down on the maintenance, and quickly determine whether or not it's the duplicate content that's preventing you from ranking or if you need to focus on other on-site or off-site signals.