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    Advanced Stats Resources and Primers

    Here are some resources where you can find the stats themselves as well as statistical analysis blogs, primers, essays, and books:


    Websites:

    Basketball-Reference

    82games.com

    Basketball Value

    HoopData

    Hardwood Paroxysm

    Basketball Prospectus

    APBRmetrics

    NBAstuffer.com

    PopcornMachine.net

    Basketball Geek

    Stats by Numbers

    Team Rankings

    Basketball-Analysis


    twitter:

    http://twitter.com/tomhaberstroh

    http://twitter.com/Hoopdata

    http://twitter.com/bball_ref

    http://twitter.com/HPbasketball

    http://twitter.com/basketballvalue

    http://twitter.com/johnhollinger

    http://twitter.com/dmorey


    Books:

    Basketball On Paper, by Dean Oliver


    Primers, Glossaries, & Some Introductory Advanced Stats:

    And here are a few good elementary primers on some of the main advanced metrics.


    Click here for The Basketball Notebook Stats Primer for a good overview.


    Two great glossary/dictionary type references can be found at the following links:
    The BBR Blog-tionary
    -and-
    an Advanced Statistics Glossary at APBRmetrics


    Here, from Ben Q Rock at the Orlando Pinstriped Post, are a few more detailed primers which introduce some specific stats and concepts:

    Advanced Metrics Handbook, Vol. 1: Effective Field Goal Percentage
    The formula:
    (FG + 0.5 * 3P) / FGA

    Advanced Metrics Handbook, Vol. 2: True Shooting Percentage
    The formula:
    Points / (2 * (FGA + 0.44 * FTA))

    Advanced Metrics Handbook, Vol. 3: Pace
    The formula:
    0.96 * (FGA + 0.44 * FTA + TO - OReb


    From another thread, here Chronz' explanation of why that ".44" number is in the TS% formula:
    Quote Originally Posted by Chronz
    Let me word it differently, if 44% of each free throw cost a possession then 1 pair of free throws take .88 right. The other 12% come from either AND1's technicals, flagrants, clear-path fouls, or as the third part of a shooting foul from behind the three-point arc.

    Mathematically speaking, you start with a FTA = 1/2 a possession or 0.5, then you deduct for those 12% aforementioned sequences, where 0.5 * 0.12 = 0.06 and 0.5 - 0.06 = 0.44

    And also from another thread, here's patsSOXknicks' breakdown of the difference between assist % and assist ratio:
    Quote Originally Posted by patsSOXknicks View Post
    Basketball-reference has Ast% vs. what they have on ESPN and Hoopdata with Assist Ratio. These are different statistics and they do have different meanings.

    From basketball-reference

    AST%
    Assist Percentage (available since the 1964-65 season in the NBA); the formula is 100 * AST / (((MP / (Tm MP / 5)) * Tm FG) - FG). Assist percentage is an estimate of the percentage of teammate field goals a player assisted while he was on on the floor.
    From ESPN
    AST: Assist Ratio - the percentage of a player's possessions that ends in an assist. Assist Ratio = (Assists x 100) divided by [(FGA + (FTA x 0.44) + Assists + Turnovers]
    Both of these stats are better then assists per game as that completely ignores pace.
    A look at the league leaders:

    http://www.basketball-reference.com/...0_leaders.html

    http://insider.espn.go.com/nba/holli...%3dassistRatio

    Pretty different. Why? Well upon closer look, the guys with really high Ast% have higher USG% too compared to the guys with just high Assist Ratios. Lebron is not even on the league leaders for Assist Ratio but he's 5th in Ast%- it's because he's 2nd in the NBA in usage rate. So he's going to Ast on a really high percentage of his teams FG because he's used more (and is obviously a good passer too) then say someone like Jason Kidd who doesn't have everything run through him all the time. So for the possessions that Jason Kidd is involved in, a very high % of them end in an assist but the % of the teams FG that he assisted won't be as high since his USG rate isn't as high and because Ast% is based on the minutes you're on the floor, not on the possessions in which you're involved in.
    ---------------------------------




    If you know of any additional websites, twitterers, books, etc. which you think should be added to the list above, please post them in this thread.
    Last edited by DenButsu; 09-27-2010 at 09:42 AM.
    I blog basketball at Roundball Mining Company///Twitter: @denbutsu

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