This site under reconstruction.
Generally, you should use software tools that have been well tested and provide robust results, but there are times when you just need to do your own thing. Maybe the software doesn’t give you the information you need and you need to dig into the details deeper. Or you need to do some ad hoc…
Earlier this week, I read a blog by Paul Krugman on the inaugural of Nate Silver’s FiveThirtyEight website (or maybe the re-birthing of the site). The main point of the blog is that you can’t throw up the data and say “the data speaks for itself”. You need to do some analysis and indicate what the…
Remember when Wall Street swooned into a mini 5 minute crash in 2010? About 9% of the market disappeared in 5 minutes. The forensic guys never really figured out what happened although computerized trading was most commonly alluded as the culprit. Yesterday, I ran across in LinkedIn Pulse a TED talk by Kevin Slavin on…
This post will be a short one since I’m working on a project for a friend. The random function in Excel is kind of a neat function. There are two: 1) rand() and randbetween(a,b). Some uses for it are: 1) Randomize your numbers in Monte Carlo simulation; 2) Randomly organize your numbers if you want to…
The last post was a little puzzle on determining tax rates if the computer is not cooperating. This is an old puzzle from back in the early 90’s, so we shouldn’t face this kind of issue today. At least, I hope things have improved. Please see prior post for the description of the puzzle since I will jump…
Suppose you were handed an assignment one day, one which your boss and co-workers could not figure out. They needed to figure out which tax amounts were related to which expenses. For some reason, the computer system dished out a list of numbers with no rhyme or reason or description. The only clue you had…
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