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A '''hockey stick graph''' or '''hockey stick curve''' is a graph, or curve shape, that resembles an ], in that it turns sharply from a nearly flat "blade" to a long "handle". In ],<ref>{{cite book |title=Society of Plastics Engineers. Technical Conference Proceedings, Part I |date=1985 |publisher=Society of Plastics Engineers | url = https://books.google.com/books?id=tuRTAAAAMAAJ&q=%22hockey+stick+graph%22&dq=%22hockey+stick+graph%22&hl=en&newbks=1&newbks_redir=0&sa=X&ved=2ahUKEwi2uMvB_cz5AhUhATQIHZ9aAF4Q6AF6BAgEEAI |access-date=17 August 2022 | quote = The hockey-stick graph, which shows a magnificent turnaround in our business starting tomorrow, is familiar to all. This is partly the fault of marketing managers who, by nature, tend to be optimists; but it is also the fault of top management, who will not accept any project that promises less than spectacular results.}}</ref> A '''hockey stick graph''' or '''hockey stick curve''' is a graph, or curve shape, that resembles an ], in that it turns sharply from a nearly flat "blade" to a long "handle". In ],<ref>{{cite book |title=Society of Plastics Engineers. Technical Conference Proceedings, Part I |date=1985 |publisher=Society of Plastics Engineers | url = https://books.google.com/books?id=tuRTAAAAMAAJ&q=%22hockey+stick+graph%22&dq=%22hockey+stick+graph%22&hl=en&newbks=1&newbks_redir=0&sa=X&ved=2ahUKEwi2uMvB_cz5AhUhATQIHZ9aAF4Q6AF6BAgEEAI |access-date=17 August 2022 | quote = The hockey-stick graph, which shows a magnificent turnaround in our business starting tomorrow, is familiar to all. This is partly the fault of marketing managers who, by nature, tend to be optimists; but it is also the fault of top management, who will not accept any project that promises less than spectacular results.}}</ref>
],<ref>{{cite journal |last1=Halfmill |first1=Tom |title=Who Will Wire Your Home? |journal=Maximum PC |date=July 1999 |page=37 |url=https://books.google.nl/books?id=1wEAAAAAMBAJ&pg=PT40&dq=%22hockey+stick%22+graph&hl=en&sa=X&ved=2ahUKEwjp6Lfvxar5AhWS4IUKHRHZAsc4ChDoAXoECAgQAg#v=onepage&q=%22hockey%20stick%22%20graph&f=false |access-date=17 August 2022 | quote = As usual, industry p​undits are trotting out their all-purpose hockey-stick graphs to show that home networking will soon be a huge market.}}</ref> ],<ref>{{cite journal |last1=Halfmill |first1=Tom |title=Who Will Wire Your Home? |journal=Maximum PC |date=July 1999 |page=37 |url=https://books.google.nl/books?id=1wEAAAAAMBAJ&pg=PT40&dq=%22hockey+stick%22+graph&hl=en&sa=X&ved=2ahUKEwjp6Lfvxar5AhWS4IUKHRHZAsc4ChDoAXoECAgQAg#v=onepage&q=%22hockey%20stick%22%20graph&f=false |access-date=17 August 2022 | quote = As usual, industry pundits are trotting out their all-purpose hockey-stick graphs to show that home networking will soon be a huge market.}}</ref>
], and ]s, a hockey stick graph is one in which the "blade" is near zero (hugging the floor) before the graph turns upward to a long nearly straight increasing section. In ], the ] describing 1000 years of global or hemispheric temperature has the "handle" horizontal and "blade" turning upward. ], and ]s, a hockey stick graph is one in which the "blade" is near zero (hugging the floor) before the graph turns upward to a long nearly straight increasing section. In ], the ] describing 1000 years of global or hemispheric temperature has the "handle" horizontal and "blade" turning upward.


Revision as of 04:13, 17 August 2022

A "hockey pencil" in the shape of an ice hockey stick, with the eraser being the blade; its bottom edge here is a fair representation of a hockey stick graph. If the graph starts above zero and drops a little before rising, it may be called a J curve.

A hockey stick graph or hockey stick curve is a graph, or curve shape, that resembles an ice hockey stick, in that it turns sharply from a nearly flat "blade" to a long "handle". In economics, marketing, mathematics, and dose–response relationships, a hockey stick graph is one in which the "blade" is near zero (hugging the floor) before the graph turns upward to a long nearly straight increasing section. In climate science, the hockey stick graph (global temperature) describing 1000 years of global or hemispheric temperature has the "handle" horizontal and "blade" turning upward.

See also

References

  1. Society of Plastics Engineers. Technical Conference Proceedings, Part I. Society of Plastics Engineers. 1985. Retrieved 17 August 2022. The hockey-stick graph, which shows a magnificent turnaround in our business starting tomorrow, is familiar to all. This is partly the fault of marketing managers who, by nature, tend to be optimists; but it is also the fault of top management, who will not accept any project that promises less than spectacular results.
  2. Halfmill, Tom (July 1999). "Who Will Wire Your Home?". Maximum PC: 37. Retrieved 17 August 2022. As usual, industry pundits are trotting out their all-purpose hockey-stick graphs to show that home networking will soon be a huge market.
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