Kristian Ferrell
In basketball, WS stands for Win Shares, a player statistic that aims to distribute credit for team success among individual players. It is calculated using player, team, and league-wide statistics, including points produced, offensive possessions, and marginal offense. The sum of the win shares of all players on a team should be roughly equal to the team's total wins for the season. This statistic provides insights into a player's offensive and defensive contributions and is considered a valuable tool for evaluating individual performance and its impact on team success.
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Win Shares (WS) is a player statistic
In basketball, WS stands for Win Shares, a player statistic that attempts to distribute credit for team success to individual players. The sum of player win shares on a team will be roughly equal to that team's win total for the season. Win Shares were created by John Zubatko, the founder of basketball-reference.com, based on formulas and principles outlined in APBRmetrics pioneer Dean Oliver's book, "Basketball on Paper". The idea and name were inspired by the win share statistic in baseball's Sabermetric community.
Win Shares are calculated using player, team, and league-wide statistics. Offensive Win Shares are calculated using Dean Oliver's points produced and offensive possessions. The formula for Offensive Win Shares is: (marginal offense) / (marginal points per win). Marginal offense is calculated as follows: (points produced) - 0.92 * (league points per possession) * (offensive possessions). Marginal points per win is calculated as: 0.32 * (league points per game) * ((team pace) / (league pace)).
Defensive Win Shares take all facets of the defensive game into account and are tempo-free. The metric is scaled so that one DWS is equal in value to one win added to the player's team's record. The formula's numerator calculates a player's marginal defensive value, or the quantifiable amount that the team's defensive ability increases while the player is on the court.
Win Shares are considered a better metric than Player Efficiency Rating (PER) because they account for defensive effectiveness/ability and encompass a player's defensive contributions that led to a win during the season. However, it is important to recognize that a player's overall win share is largely subject to the current status of the team, such as changes in the lineup or trades, which can impact the overall defensive performance of the team.
While Win Shares are a valuable tool, they should not be taken literally or at face value. They are also subject to certain limitations, such as being a counting stat that benefits players who are on the court for more minutes. Additionally, the output of WS/48, or Win Shares per 48 minutes, tends to be extraordinarily small, making it difficult to easily differentiate between players.
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WS measures a player's offensive and defensive contributions
In basketball, WS stands for Win Shares, a player statistic that attempts to distribute credit for team success to individual players. It is calculated using player, team, and league-wide statistics. The sum of the win shares of all players on a team will be roughly equal to the team's total wins for the season. Win Shares were created by John Zubatko, the founder of basketball-reference.com, and are based on formulas and principles outlined in Dean Oliver's book, "Basketball on Paper".
Win Shares measure a player's offensive and defensive contributions to their team's success. Offensive Win Shares are calculated using Dean Oliver's points produced and offensive possessions. The formula for calculating Offensive Win Shares is quite detailed and can be found in Oliver's book. Defensive Win Shares, on the other hand, take into account all facets of the defensive game and are considered tempo-free. The metric is scaled so that one Defensive Win Share (DWS) is equal in value to one win added to the player's team's record.
Win Shares consider the context of a player's performance. For example, it considers a field goal as being worth less than two points, as some credit must be given to other players involved in that point, such as through an assist or offensive rebound. This holistic view of a player's contribution to a field goal is similar to Hollinger's P.E.R. statistic. Additionally, Win Shares take into account the pace of play to adjust a player's contributions to a more standard rate.
While Win Shares provide valuable insights into a player's performance, it is important to recognize its limitations. A player's overall win share is influenced by the current status of the team, such as changes in the lineup or trades. Additionally, Win Shares are subject to fluctuations due to factors beyond an individual's control, impacting the overall defensive performance of the team. Despite these considerations, Win Shares offer a more comprehensive evaluation of a player's defensive abilities than the P.E.R. statistic.
Win Shares per 48 minutes (WS/48) is a variation of the metric invented by Justin Kubatko. It represents the idea that "a win share is worth one-third of a team win". For example, if a team wins 60 games, there are 180 Win Shares to distribute among the players. While WS/48 provides a more standardized comparison, the small output numbers can make it challenging to differentiate between players.
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WS is calculated using player, team and league-wide statistics
WS stands for Win Shares in basketball. It is a player statistic that attempts to distribute credit for team success to individuals on the team. Win Shares are calculated using player, team, and league-wide statistics, with the sum of player Win Shares on a given team roughly equalling that team's win total for the season.
Win Shares were invented by Justin Kubatko, who explained the concept as follows: "A win share is worth one-third of a team win. If a team wins 60 games, there are 180 'Win Shares' to distribute among the players." This means that the total number of Win Shares a team can have is directly proportional to the number of games they win. For example, if a basketball team wins 50 games, they will have approximately 50 Win Shares to distribute among the players.
The calculation of Win Shares involves various factors, including a player's offensive and defensive contributions, as well as their playing time. Offensive Win Shares are calculated using Dean Oliver's points produced and offensive possessions. This takes into account the player's points produced, offensive possessions, league points per possession, and team pace. Marginal offense is calculated as (points produced) - 0.92 * (league points per possession) * (offensive possessions). This value is then divided by marginal points per win, which is calculated as 0.32 * (league points per game) * (team pace / league pace). The result is the player's Offensive Win Shares.
Defensive Win Shares are credited based on Dean Oliver's Defensive Rating, which estimates the player's points allowed per 100 defensive possessions. This takes into account the team's points per game and opponent points per game. Marginal defense is calculated and then divided by marginal points per win to determine the player's Defensive Win Shares.
Additionally, player possessions are an important factor in calculating Win Shares. While the NBA did not track player turnovers until the 1977-78 season, they did track turnovers at the team level from 1973-74 to 1976-77. As a result, player turnover estimates are used for the earlier period by considering factors such as minutes played, player age, field goals, field goal attempts, free throw attempts, total rebounds, assists, and personal fouls.
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WS/48 is win shares per 48 minutes
WS stands for Win Shares, a player statistic that attempts to distribute credit for team success to individual players. The sum of player win shares on a given team will be roughly equal to that team's win total for the season. Win Shares were created by John Zubatko, the founder of basketball-reference.com, and are based on formulas and principles outlined in APBRmetrics pioneer Dean Oliver's book, "Basketball on Paper".
Win Shares are calculated using player, team, and league-wide statistics. Offensive Win Shares are calculated using Dean Oliver's points produced and offensive possessions. The formula for Offensive Win Shares is:
Marginal offense) / (marginal points per win)
Marginal offense is equal to (points produced) - 0.92 * (league points per possession) * (offensive possessions). Marginal points per win is calculated as:
32 * (league points per game) * ((team pace) / (league pace))
> A win share is worth one-third of a team win. If a team wins 60 games, there are 180 'Win Shares' to distribute among the players.
The biggest flaw with WS/48 is that the output is extraordinarily small, with Michael Jordan leading at 0.2505. This makes it difficult to differentiate between players, as the numbers are all decimals and one must often look at the second or third digit after the decimal point.
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WS is based on Dean Oliver's book, 'Basketball on Paper'
In basketball, "WS" stands for "Win Shares", a player statistic that attempts to distribute credit for team success to individual players. Win Shares are calculated using player, team, and league-wide statistics. The sum of a team's player win shares will be roughly equivalent to the team's total wins for the season.
Win Shares is based on Dean Oliver's book, *Basketball on Paper: Rules and Tools for Performance Analysis*. Oliver is a former basketball player, assistant coach, and collegiate scout. He has also contributed to the *Basketball Digest* and founded the *Journal of Basketball Studies* in 1996. In his book, Oliver presents an insightful framework for basketball, providing a set of statistical tools and rules that can help explain why a basketball team is winning or losing.
Oliver's book is unique in its incorporation of business and analytical concepts within the context of basketball to measure the value of players in a cooperative setting. It does not diagram plays or explain how players get in shape, but instead demonstrates how to interpret player and team performance. Oliver highlights general strategies for teams when they are winning or losing and what aspects should be the focus in either situation. He describes and quantifies the jobs of team leaders and role players, and then discusses the interactions between players and how to achieve the best fit.
Oliver also conceptualizes the meaning of teamwork and how to quantify the value of different types of players working together. He examines historically successful NBA teams and identifies what made them so successful: individual talent, a system of putting players together, or good coaching. He then uses these statistical tools and case studies to evaluate the best players in history, such as Magic Johnson, Wilt Chamberlain, and Bill Russell, and how they contributed to their teams' success.
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Frequently asked questions
WS stands for Win Shares, a player statistic that attempts to divvy up credit for team success to individuals on the team.
Win Shares are calculated using player, team, and league-wide statistics. The sum of player Win Shares on a given team will be roughly equal to that team's win total for the season.
Some examples of WS in basketball include Michael Jordan, who is the career leader at 0.2505, and Kareem Abdul-Jabbar, who holds the all-time single-season record of 25.4 Win Shares.
