Poisson regression - Revision history

2601:A:6380:712:ACB2:9090:3B03:6D67: /* Regression models */

2015-01-04T18:51:05Z

Regression models

← Older revision		Revision as of 20:51, 4 January 2015
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	Hi there. ~~Allow me start by introducing~~ the ~~writer, her name~~ is ~~Sophia~~. I'~~ve always loved~~ living ~~in Kentucky~~ but now ~~I'm considering other choices. To climb~~ is ~~something I truly enjoy doing. My day job is an invoicing officer but I've already applied for another 1~~.<br><br>~~Here is~~ my blog post~~: psychics online (~~[http://www.~~weddingwall~~.com~~.au~~/~~groups/easy-advice-for-successful-personal-development-today/ http://www.weddingwall.com.au~~/])		Marvella is what you can call her but it's not the most female name out there. One of the issues he loves most is ice skating but he is having difficulties to discover time for it. Minnesota is where he's been living for years. He used to be unemployed but now he is a meter reader.<br><br>Also visit my blog post [http://www.karachicattleexpo.com/blog/56 at home std testing]

128.220.117.40: fix sentence that did not make sense

2014-02-06T02:40:31Z

fix sentence that did not make sense

← Older revision		Revision as of 04:40, 6 February 2014
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	~~In [[game theory]], a '''symmetric game''' is a game where the payoffs for playing a particular strategy depend only on the other strategies employed, not on who is playing them~~. ~~If one can change the identities of the players without changing the payoff to~~ the ~~strategies~~, ~~then a game~~ is ~~symmetric~~. ~~Symmetry can come~~ in ~~different varieties.~~ '~~''Ordinally symmetric games''' are games that are symmetric with respect to the [[Ordinal scale\|ordinal]] structure of the payoffs~~. ~~A game~~ is ~~'''quantitatively symmetric''' if and only if it~~ is ~~symmetric with respect to the exact payoffs.~~		Hi there. Allow me start by introducing the writer, her name is Sophia. I've always loved living in Kentucky but now I'm considering other choices. To climb is something I truly enjoy doing. My day job is an invoicing officer but I've already applied for another 1.<br><br>Here is my blog post: psychics online ([http://www.weddingwall.com.au/groups/easy-advice-for-successful-personal-development-today/ http://www.weddingwall.com.au/])

	~~== Symmetry in 2x2 games ==~~

	~~{\| border="1" align=right cellpadding="4" cellspacing="0" style="margin: 1em 1em 1em 0; background: #f9f9f9; border: 1px #aaa solid; border-collapse: collapse; font-size: 95%;"~~
	\|-
	\|
	~~! ''E''~~
	~~! ''F''~~
	\|-
	! '~~'E''~~
	~~\| a, a~~
	~~\| b, c~~
	\|-
	~~! ''F''~~
	~~\| c, b~~
	~~\| d, d~~
	\|}

	Only 12 out the 144 ordinally distinct [[2x2 game]]s are symmetric. However, many of the commonly studied 2x2 games are at least ordinally symmetric. The standard representations of [[game of chicken\|chicken]], the [[Prisoner's Dilemma]], and the [[Stag hunt]] are all symmetric games. Formally, in order for ~~a 2x2 game to be symmetric, its [[payoff matrix]] must conform to the schema pictured to the right.~~

	~~The requirements for a game to be ordinally symmetric are weaker, there it need only be the case that the ordinal ranking of the payoffs conform to the schema on the right~~.

	~~== Symmetry and equilibria ==~~

	Nash (1951) shows that every symmetric game has a symmetric [[mixed strategy]] [[Nash equilibrium]]. Cheng et al. (2004) show that every two-strategy symmetric game has a (not necessarily symmetric) [[pure strategy]] [[Nash equilibrium]].

	~~==Uncorrelated asymmetries: payoff neutral asymmetries==~~
	Symmetries here refer to symmetries in payoffs. Biologists often refer to asymmetries in payoffs between players in a game as ''correlated asymmetries''. These are in contrast to [[uncorrelated asymmetry\|uncorrelated asymmetries]] which are purely informational and have no effect on payoffs (e.g. see [[Hawk-dove]] game).

	~~== The general case ==~~

	~~Dasgupta and Maskin consider games <math>(A_i , U_i)</math> where <math>U_i:A_i\longrightarrow\Bbb{R}~~<~~/math~~> ~~where~~ <~~math>U_i,i=1,\ldots N~~
	~~</math~~> is the payoff function for player <math>i</math> and <math>A_1=A_2=\ldots=A_N</math> is player <math>i</math>'s strategy set. Then the game is defined to be symmetric if for any [[permutation]] <math>\pi</math>,

	:~~<math>~~
	~~U_i~~(~~a_1,\ldots,a_i,\ldots,a_N) = U_{\pi(i)}(a_{\pi(1)},\ldots,a_{\pi(i)},\ldots,a_{\pi(N)}).</math>~~

	~~== References ==~~
	* Shih-Fen Cheng, Daniel M. Reeves, Yevgeniy Vorobeychik and Michael P. Wellman. Notes on Equilibria in Symmetric Games, International Joint Conference on Autonomous Agents & Multi Agent Systems, 6th Workshop On Game Theoretic And Decision Theoretic Agents, New York City, NY, August 2004. [http://www.~~sci~~.~~brooklyn~~.~~cuny.edu~~/~~~parsons~~/~~events~~/~~gtdt/gtdt04/reeves.pdf]~~
	* [http://www.~~gametheory~~.~~net/dictionary/Games/SymmetricGame~~.~~html Symmetric Game] at [http:/~~/~~www.gametheory.net Gametheory.net~~]
	* P. Dasgupta and E. Maskin 1986. "The existence of equilibrium in discontinuous economic games, I: Theory". ''The Review of Economic Studies'', 53(1)~~:1-26~~
	* John Nash. "Non-cooperative Games". "The Annals of Mathematics", 2nd Ser., 54(2):286-295, September 1951.

	~~== Further reading ==~~
	* {{cite book\|author1=David Robinson\|author2=David Goforth\|title=The topology of the 2x2 games: a new periodic table\|year=2005\|publisher=Routledge\|isbn=978-0-415-33609-3}}

	~~{{game theory}}~~

	~~[[Category:Game theory]]~~

74.242.203.8: /* Implementations */

2013-12-05T03:31:36Z

Implementations

← Older revision		Revision as of 05:31, 5 December 2013
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	~~Hello~~ and ~~welcome~~. ~~My name is Numbers Wunder~~. ~~I am~~ a ~~meter reader but I plan~~ on ~~altering it~~. ~~North Dakota is where me~~ and ~~my husband reside~~. ~~Playing baseball~~ is the ~~pastime he will never quit doing~~.<br><br>~~Check out my blog post~~: [http://www.~~blaze16~~.~~com~~/~~blog~~/~~257588~~ at ~~home std testing~~]		In [[game theory]], a '''symmetric game''' is a game where the payoffs for playing a particular strategy depend only on the other strategies employed, not on who is playing them. If one can change the identities of the players without changing the payoff to the strategies, then a game is symmetric. Symmetry can come in different varieties. '''Ordinally symmetric games''' are games that are symmetric with respect to the [[Ordinal scale\|ordinal]] structure of the payoffs. A game is '''quantitatively symmetric''' if and only if it is symmetric with respect to the exact payoffs.

			== Symmetry in 2x2 games ==

			{\| border="1" align=right cellpadding="4" cellspacing="0" style="margin: 1em 1em 1em 0; background: #f9f9f9; border: 1px #aaa solid; border-collapse: collapse; font-size: 95%;"
			\|-
			\|
			! ''E''
			! ''F''
			\|-
			! ''E''
			\| a, a
			\| b, c
			\|-
			! ''F''
			\| c, b
			\| d, d
			\|}

			Only 12 out the 144 ordinally distinct [[2x2 game]]s are symmetric. However, many of the commonly studied 2x2 games are at least ordinally symmetric. The standard representations of [[game of chicken\|chicken]], the [[Prisoner's Dilemma]], and the [[Stag hunt]] are all symmetric games. Formally, in order for a 2x2 game to be symmetric, its [[payoff matrix]] must conform to the schema pictured to the right.

			The requirements for a game to be ordinally symmetric are weaker, there it need only be the case that the ordinal ranking of the payoffs conform to the schema on the right.

			== Symmetry and equilibria ==

			Nash (1951) shows that every symmetric game has a symmetric [[mixed strategy]] [[Nash equilibrium]]. Cheng et al. (2004) show that every two-strategy symmetric game has a (not necessarily symmetric) [[pure strategy]] [[Nash equilibrium]].

			==Uncorrelated asymmetries: payoff neutral asymmetries==
			Symmetries here refer to symmetries in payoffs. Biologists often refer to asymmetries in payoffs between players in a game as ''correlated asymmetries''. These are in contrast to [[uncorrelated asymmetry\|uncorrelated asymmetries]] which are purely informational and have no effect on payoffs (e.g. see [[Hawk-dove]] game).

			== The general case ==

			Dasgupta and Maskin consider games <math>(A_i , U_i)</math> where <math>U_i:A_i\longrightarrow\Bbb{R}</math> where <math>U_i,i=1,\ldots N
			</math> is the payoff function for player <math>i</math> and <math>A_1=A_2=\ldots=A_N</math> is player <math>i</math>'s strategy set. Then the game is defined to be symmetric if for any [[permutation]] <math>\pi</math>,

			:<math>
			U_i(a_1,\ldots,a_i,\ldots,a_N) = U_{\pi(i)}(a_{\pi(1)},\ldots,a_{\pi(i)},\ldots,a_{\pi(N)}).</math>

			== References ==
			* Shih-Fen Cheng, Daniel M. Reeves, Yevgeniy Vorobeychik and Michael P. Wellman. Notes on Equilibria in Symmetric Games, International Joint Conference on Autonomous Agents & Multi Agent Systems, 6th Workshop On Game Theoretic And Decision Theoretic Agents, New York City, NY, August 2004. [http://www.sci.brooklyn.cuny.edu/~parsons/events/gtdt/gtdt04/reeves.pdf]
			* [http://www.gametheory.net/dictionary/Games/SymmetricGame.html Symmetric Game] at [http://www.gametheory.net Gametheory.net]
			* P. Dasgupta and E. Maskin 1986. "The existence of equilibrium in discontinuous economic games, I: Theory". ''The Review of Economic Studies'', 53(1):1-26
			* John Nash. "Non-cooperative Games". "The Annals of Mathematics", 2nd Ser., 54(2):286-295, September 1951.

			== Further reading ==
			* {{cite book\|author1=David Robinson\|author2=David Goforth\|title=The topology of the 2x2 games: a new periodic table\|year=2005\|publisher=Routledge\|isbn=978-0-415-33609-3}}

			{{game theory}}

			[[Category:Game theory]]

en>طاها: /* Maximum likelihood-based parameter estimation */ gradient descent is an example of convex optimization

2012-08-21T00:16:52Z

Maximum likelihood-based parameter estimation: gradient descent is an example of convex optimization

New page

Hello and welcome. My name is Numbers Wunder. I am a meter reader but I plan on altering it. North Dakota is where me and my husband reside. Playing baseball is the pastime he will never quit doing.<br><br>Check out my blog post: [http://www.blaze16.com/blog/257588 at home std testing]