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**
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

Quote:

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

Quote:

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.

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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. :cheers: