I have a raw data set consisting of trades and quotes data. Based on some research papers few variables are added to the existing variables in the raw data set. The objective is to find out how significant is each variable in determining the price. I read somewhere that copulas (vine copulas) may be helpful, but am unable to locate any SAS document with codes, syntax, examples, etc. for copulas.
Please share relevant links where copulas (vine copulas) in SAS are discussed.