Possibly, or both, but mainly the codingI think I see. What you want to do is replicate the authors' values in Table II -- is that correct? I think the problem is not the coding, but figuring out exactly what formulas the authors are using. Good luck!
Here you go http://sv.tinypic.com/r/2cqgnie/9They don't have a paper on finance? I wish we could see more of p432!