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Free: Dr. Savage's New Book, The Flaw of Averages with the Purchase of XLSim 3 - you pay freight only.

"I highly recommend The Flaw of Averages."
William J. Perry
Former U.S. Secretary of Defense

"Enterprise analysis under uncertainty has long been an academic ideal. ... In this profound and entertaining book, Professor Savage shows how to make all this practical, practicable and comprehensible."
Harry Markowitz
Nobel Laureate in Economics

"The Flaw of Averages is a rare mix of entertainment and education."
The Investment Professional

"I highly recommend this book as an entertaining and enlightening read for anyone who deals with estimating uncertainty."
Risk Professional Magazine

How to Get it:

Download trial version of XLSim 3 here, then click the button below to purchase the activation key for $199.95 and get your free copy of The Flaw of Averages.
ADD Decision Making with Insight, Dr. Savage's text book and Management Science software, including the Commercial Edition of XLTree, the Decision Tree package, for a combined package price of $274.95 plus shipping. Click the button below.
Already own Insight Standard Edition and want to upgrade? Purchase the electronic Upgrade, and receive The Flaw of Averages for Free (pay freight only). $199.95. Click the button below.

1000 Monte Carlo trials...
             ...before your finger leaves the Enter key

Uses DIST™ Technology*
Brings DIST technology to Crystal Ball and @Risk
Can Exchange DISTs with Risk Solver

Overview of
XLSim 3...

Click here for a quick review of features.

Try It Now...

Download a free interactive portfolio model for Excel. You must have Macros enabled to run it.


Generate DIST's with traditional Monte Carlo simulation, then use them to create single worksheet interactive simulation models. For larger interactive models we recommend Risk Solver from Frontline Systems. XLSim 3 models may be easily transferred to Risk Solver, and DISTs may be shared between the two packages.

Sorry, XLSim 3 is not for everyone. We recommend at least an intermediate level of skill with Microsoft Excel.

*The DIST distribution string is a revolutionary new representation for probability distributions, enabling the consolidation of simulation models.
(See ProbabilityManagement.org.)



For further options, including the software without books and no shipping charges, go to

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