I can't seem to get an answer on sps, so maybe someone here knows. Typically in Quantum gravity, people deal with the truncated graviton series (since its not renormalizable) following Wilson's ideas. Its usually cut off at 1 loop. It still gives a value, and people take it fairly seriously, at least they did back in the 70s. Now, in string theory the graviton is renormalizable and also free of anomalies, sooo has anyone calculated Stringy Graviton diagrams to say two loops and compared numbers? Better yet, what does the renormalization group flow look like? Forgive the ignorance if i'm asking a stupid question, I know little about Stringy mechanics. I know in other problems where some dumb particle theorist asks for something he knows about, computed in String calculations, he often gets poopoo'd since fields don't seem to be seperable like in naive qft and giving an answer seems to be non trivial. Is this also the case for Gravitons. Make whatever simplifications and assumptions you like, (eg perhaps deal with the bosonic string) I just want to look at the differences between series.