I am responding here because a couple people clued me in on this topic. I see a few others who have far better practical input than I, have already posted. NoImagination , Nyanko and Gella are also far more into research as their core than I am.
I was accepted to a combined program, but turned it down in the end to just do a simple DVM. Yeah doing so probably shocked a lot of people.
😳 As for compensation, I think that depends on each individual person, and how bad the school wants them. I was offered a pretty darn good package at a pretty cool school, especially on the PhD side, which is where they really wanted me to be truthful. I got the feeling the DVM was a bone they were simply throwing me. If you are going to do a combined program out of the blocks you really need to be absolutely sure that is what you want to do, and also need to have pretty good street cred within the research end of things, whatever that means in your chosen field.
In the end I decided against it because number one I was not in my heart totally dedicated to living in a windowless room for the rest of my life, and also because the projects I was being offered were not truly exactly where I wanted to be going in my field. I had also just spent a few years in the middle of the very cutthroat research world, and was pretty burned out by all the cat fighting. That said, I can always change my mind and go back in if I decide I really want to. That is the nice thing with a DVM, you can go just about anywhere with that degree. I would rather spend the time getting boarded if I decide after 2013 I am not done with school yet. A PhD is much more limiting,
to my interests.

That said, I am laser focused on a very narrow and obscure branch of veterinary medicine, one without a lot of great commercial promise, and truth be told not all that popular socially within the industry. Were I doing the same thing in human medicine it would be a different deal entirely, and that was where I could see myself ending up.
Not sure if that answered anyone's questions, but shows what went through my mind as far as the decision making process. My best friend from high school is a PhD biochemist involved with yeast antibody genetics, and he both loves what he does, and has a pretty darn good career future in private industry. The gal who ended up taking my seat in the combined program loves it, and is actually complaining more about being OUT of the lab for so long in order to get her DVM. More power to them.
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Good luck peoples. Were it me, I would say get your DVM, then decide if a PhD is where you want to take it. But that is just my 2 cents worth.