Please see the important policy note I have added to the left sidebar:
I edit and improve most of my posts after I initially place them....I will, however, note if I have made a major change of opinion, or corrected an important mistake of fact that could be substantially harmful to a person or party. This is subject to interpretation...My last post, for example, has undergone a great deal of editing. It's difficult to explain how, and how much, an MBA is valued in academic economics and finance in a short space without being misconstrued. I added a lot of qualifiers and caveats, so that now I think it's a lot more accurate and less likely to be misinterpreted.