Justin Holman is CEO of Aftermarket Analytics, where he leads efforts to develop cutting edge sales forecasting and inventory optimization technology for the Automotive Aftermarket. Prior to joining Aftermarket Analytics, Justin managed corporate consulting for the Strategy & Analytics division at MapInfo Corporation, leading major projects for retail clients including The Home Depot, Darden Restaurants, Bridgestone-Firestone, Sainsbury’s and New York & Company. Before that, Justin served as Vice President of Software Development at LogicTools, now part of IBM's supply chain application software group. Justin holds a B.A. from Claremont McKenna College, a Ph.D. from the University of Oregon and an Executive Management certificate from Northwestern University's Kellogg School of Management.


  • Clarissa Mendez 7 years ago

    Hi Professor Holman,

    I ran into issues while trying to run lesson03c.py and lesson04_multiregress.py. The error is coming from us using a newer version of python. The way I got around the error is by writing the following code as the first line of code:


    This allows you to use version 2.7 of python, and runs lesson03c.py and lesson04 without errors.

    • Justin 7 years ago

      Cool, thanks Clarissa! Please remind me to share with students in class on Thursday.

  • Sheri Romero 7 years ago

    Professor Holman,

    Can you check my page on python smedina023, I keep getting ImportError: No module named ‘statsmodels’.

    Thank you,
    Sheri Romero

    • Justin 7 years ago

      Hi Sheri,

      I think this problem can be addressed by Clarissa’s suggestion above. Try to include the text string on line one: #!/usr/bin/python2.7


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