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Update Evolution of Modern Economic Theory assignment details
 
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==Introduction and figure wrong==
"Losses hurt more than gains feel good (loss aversion). This differs greatly from expected utility theory, in which a rational agent is indifferent to the reference point. In expected utility theory, the individual only cares about absolute wealth, not relative wealth in any given situation."

This part is just wrong, nowhere in expected utility theory is defined how the utility function is shaped, loss aversion can be a part of it. <span style="font-size: smaller;" class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/141.44.202.15|141.44.202.15]] ([[User talk:141.44.202.15|talk]]) 10:56, 28 November 2011 (UTC)</span><!-- Template:Unsigned IP --> <!--Autosigned by SineBot-->

The figure is wrong: the curve has a kink at the origin. That's the '''whole point;''' see Fig. 3 in ''Daniel Kahneman; Amos Tversky Econometrica,'' Vol. 47, No. 2. (Mar., 1979), pp. 263-292. I do not know enough about prospect theory to fix this page, but enough to know that what's there right now misses an essential part of the approach.[[User:Nighster|Nighster]] ([[User talk:Nighster|talk]]) 15:19, 17 December 2012 (UTC)Nighster

==Example?==
Could someone who understands PT edit the example section so that it makes sense? There are grammar errors if read aloud and avoiding words like "convexity" or at least defining them would be a great idea for us uneducated masses. <span style="font-size: smaller;" class="autosigned">—Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/75.61.123.208|75.61.123.208]] ([[User talk:75.61.123.208|talk]]) 07:58, 27 December 2008 (UTC)</span><!-- Template:UnsignedIP --> <!--Autosigned by SineBot-->


==stuff removed==
==stuff removed==
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we need something good to replace it [[User:TitaniumDreads|TitaniumDreads]] 14:15, 9 Jun 2005 (UTC)
we need something good to replace it [[User:TitaniumDreads|TitaniumDreads]] 14:15, 9 Jun 2005 (UTC)


== Another negative comment on the content ==
== criticisms of prospect theory ==
"Thus, contrary to the expected utility theory (which models the decision that perfectly rational agents would make), prospect theory aims to describe the actual behavior of people."

This is an incorrect understanding of both EU and prospect theory. Prospect theory has three parts: 1) outcomes are measured relative to a status quo - gains and losses, 2) the utility
The status quo criticisms of prospect theory from economists are much less interesting than those leveled by people like [[Gerd Gigerenzer]]. I'm definitely a neophyte with this, but would be curious to know wether or not he's a lone wolf in this regard. The little I've read by him seems fairly sophisticated and on the mark.
of net gains is not concave throughout but concave for positive net gains and convex for negative net gains, and 3) re-weighting of probabilities. 1) and 2) are completely consistent with expected utility. There is nothing in Savage, Anscombe-Aumann, or (for the non-subjective theory) Herstein and Milnor that says outcomes have to be absolute rather than relative to a status quo, or that the utility function has to have a particular shape. The only deviation from EU is 3). But even with re-weighting, the outcome is a complete, transitive and reflexive weak preference relation on a universe of alternatives, which is the conventional understanding of rational choice.
:I'm unfamiliar with his work, but feel free to add what you know. I hope he's not attacking straw men, though, Tversky and co. don't say that biases are necessarily sub-optimal, they just identify that decisions aren't made in the way a rational caluclating machine (homo economicus) would. [[User:Psychobabble|Psychobabble]] 01:58, 20 October 2005 (UTC)
:Don't worry, he's more like a lone wolf (but with a big working group) who tries to prove that only simple models can explain the world ('fast and frugal'). Economists don't notice him much.

== Picture ==

Can whoever made the picture fix that line so that it is smooth? I know it's a small matter, but it's just not aesthetically pleasing. thank you! [[User:70.111.248.60|70.111.248.60]] 02:26, 19 April 2006 (UTC)

If the following description in the article is correct:
''"...people decide which outcomes they see as basically identical and they set a reference point''
''and consider lower outcomes as losses and larger as gains."''
then shouldn't the "Reference Point" actually be called the Reference LEVEL, and applied to the
horizontal line (which also denotes, by coincidence, the horizontal axis of the graph) ?
[[User:LookingGlass|LookingGlass]] ([[User talk:LookingGlass|talk]]) 21:30, 13 February 2008 (UTC)

In the literature it is described as "reference point", so no matter what may or may not be an appropriate name, that is what it is called (Daniel Kahneman and Amos Tversky (1979) via The Psychology of Judgment and Decision Making, 1993) [[Special:Contributions/80.71.135.66|80.71.135.66]] ([[User talk:80.71.135.66|talk]]) 18:07, 2 December 2010 (UTC)

The picture seems to be missing the loss aversion, which should be shown as a change in the slope at the reference point. Please see the original figure from Kahneman and Tversky (1979 p. 279)<ref>Kahneman and Tversky. Prospect theory: An analysis of decision under risk. Econometrica: Journal of the Econometric Society (1979) vol. 47 (2) pp. 263-291</ref>. [[Special:Contributions/88.114.88.64|88.114.88.64]] ([[User talk:88.114.88.64|talk]]) 09:20, 10 December 2010 (UTC)

== Another good source ==

It's been suggested this source is a better introduction to the subject. http://www.econport.org/econport/request?page=man_ru_advanced_prospect [[User:Mathiastck|Mathiastck]] 23:39, 14 August 2006 (UTC)

*Looks like a nice introduction to this topic. However, it mentions a couple of effects that are not that closely related to Prospect Theory and omits some points. Something in this style would also be too lengthy for a wikipedia entry, I think. Nevertheless, I will add a link to this page, since it is a very useful resource by itself! [[User:Rieger|Rieger]] 18:11, 15 August 2006 (UTC)

Could you detail your points please Rieger? I've read the article referred to and it seems very
clearly and succinclty set out to me. It seems a lot simpler too IMHO and on a quite
technical topic.
[[User:LookingGlass|LookingGlass]] ([[User talk:LookingGlass|talk]]) 22:14, 13 February 2008 (UTC)

== Can anyone make this article understandable? ==
I am totally lost basically at every word. I dont understand at all what it is even about. Is there some real life implications? It was about society after all (right?). Considering that it is supposed to be quite important I guess it would be nice if even non-scientists could get a introduction. Or perhaps a real world example could help? --[[User:Thomas Veil|Thomas]] 02:57, 13 February 2007 (UTC)

:Well, I could give it a try, e.g. by adding some more fluff at the beginning, but please promise to give some further input, once I am donw with my improvements... [[User:Rieger|Rieger]] 05:30, 19 February 2007 (UTC)

::Done, hope it is a little better now... However, the article needs some more attention: There are many repetitions, complicated wording, it's fuzzy towards the end, many interesting things are missing, the references are assorted etc. Would be nice at least to explain the four-fold pattern of risk-attitudes, for instance! If I just had more time! Maybe somebody can help? :( [[User:Rieger|Rieger]] 05:53, 19 February 2007 (UTC)

:::Added a little bit more. Maybe somebody can improve my bad writing a little? If I had more time, I would also add a table for the four-fold pattern of risk-attitudes... [[User:Rieger|Rieger]] 20:45, 23 February 2007 (UTC)

: "Real world Example" ? Poker. [[User:The Gnome|The Gnome]] 11:33, 2 June 2007 (UTC)

== Prospect Theory examples ==

Anyone think some examples might be warranted? I recently came across an interesting idea that Louis the XIV's actions in regards to his many wars ([[War of Devolution]], [[Franco-Dutch War]], [[Nine Years War]], and [[War of the Spanish Succession]]) are a prime example of prospect theory. Anyone think that would be a worthwhile addition to the article? I can provide proper references, as well. - [[User:The Fwanksta|The Fwanksta]] 17:20, 19 September 2007 (UTC)

I don't find the explanation of prospect theory to be at all clear. Too much focus on "implications" and not enough explation of the theory. More examples would help. <small>—Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/132.178.133.65|132.178.133.65]] ([[User talk:132.178.133.65|talk]]) 21:45, 25 September 2007 (UTC)</small><!-- Template:UnsignedIP --> <!--Autosigned by SineBot-->

== Merge proposal ==

[[Cumulative prospect theory]] should be merged into this article. It can't fill its own article, and is defined mainly through its differences with [[Prospect theory]]. There is no reason for it to have its own page. --[[Special:Contributions/76.217.95.43|76.217.95.43]] ([[User talk:76.217.95.43|talk]]) 02:54, 24 February 2008 (UTC)

:I agree. The work is done by similar researchers, and one is a refinement of the earlier idea. It seems like merging would be a good idea. [[User:Edchi|Edchi]] ([[User talk:Edchi|talk]]) 02:30, 28 February 2008 (UTC)

:Well, I prefer two reasonably sized articles over one lengthy article. If a reader wants to know about one thing, he can read only one. If he wants to know both, there are links... Instead of merging (which would make some work) I would rather propose to improve the article (in particular adding limitations of the theory etc.) But that's only my opinion. [[User:Rieger|Rieger]] ([[User talk:Rieger|talk]]) 20:54, 31 August 2008 (UTC)

:I agree to the merge. While it would nice to have two shorter articles, I doubt that someone new to this would understand [[cumulative prospect theory]] with no prior knowledge about [[Prospect theory]]. The alternative would be to introduce Prospect Theory in Cum, which would just add to the reading burden - overall - to anyone wanting to know about both. <small><span class="autosigned">—Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[User:KapparOlsen|KapparOlsen]] ([[User talk:KapparOlsen|talk]] • [[Special:Contributions/KapparOlsen|contribs]]) 22:30, 26 July 2009 (UTC)</span></small><!-- Template:Unsigned --> <!--Autosigned by SineBot-->

:Agree with the merge. Cumulative prospect theory makes much more sense as a section than as its own article, especially as the CUm. article has only one reference, and that reference presents it as an ''advance in'' prospect theory. If both articles were fully developed, then pretty much all the content of the Cum. article will be in this one, so why have a separate article? [[User:MartinPoulter|MartinPoulter]] ([[User talk:MartinPoulter|talk]]) 15:59, 17 August 2009 (UTC)

:I disagree with the merge. They are two separate theories, with somewhat different applications. While cumulative prospect theory takes some parts of prospect theory, it is still seperate. Also, from an academic view, I have seen them referenced separately (I.E. prospect theory has not been superceded by cumulative prospect theory). Just my two cents though. [[User:Chrislk02|<font color="1E90FF">'''Chris'''</font>]][[Special:Contributions/Chrislk02|<font color="4169E1">'''lk02'''</font>]] <sup>[[User talk:Chrislk02|<font color="2A52BE">Chris Kreider</font>]]</sup> 05:53, 9 November 2009 (UTC)

:Disagree with merge. CPT is a major theory in both psychology and economics. You don't have to know about PT first in order to understand CPT. IMHO, what this article needs most is to be rewritten. The article doesn't provide enough of the detail about CPT (what evidence it is trying to explain, more details about how CPT works etc.) The two equations currently provided are to abstract to give any real idea of how CPT works, it would make much more sense to only talk about the equations for the discrete case and give real examples. There is also no discussion about probability weighting functions, an other major component of CPT. There have been over 2500 citations of the paper, many of them with interesting results. There are definitely other sources out there that should be cited in this article. Yes, CPT is an "advancement" over PT, but merging the two articles would hide just how big of an advancement CPT is. [[User:Ggdh|Ggdh]] ([[User talk:Ggdh|talk]]) 19:09, 11 November 2009 (UTC)

:Disagree with merge. Encyclopedic utility is best served with focussed articles and short lead sections, not larger all-comprising ones. CPT article needs improvement, and it not doubt has potential, with 400+ hits i Gbooks alone. Worthy as s stand-alone. [[User:Power.corrupts|Power.corrupts]] ([[User talk:Power.corrupts|talk]]) 10:54, 19 January 2010 (UTC)

== NPOV ==

This article is cluttered and disorganized, but worse is that in its meandering way it touts how PT will solve every intellectual mystery ever. We need to put more criticism and focus more on what prospect theory is, rather than advertise for it. By the way I do believe that PT is an excellent model and should be taught in undergraduate economics classes as a more realistic alternative to Von Neumann-Morgenstern expected utility in situations where the model calls for this level of specificity.
[[User:Crasshopper|Crasshopper]] ([[User talk:Crasshopper|talk]]) 06:29, 23 March 2008 (UTC)

== USELESS AS AN ENCYCLOPEDIA ENTRY ==

There are several complaints of incomprehensibility above. Come on! An encyclopedia entry is not for afficionados - it is for people who want to know what prospect theory is.
[[Special:Contributions/110.20.15.197|110.20.15.197]] ([[User talk:110.20.15.197|talk]]) 08:23, 26 February 2010 (UTC) Pepper

---------------

I cannot understand more than half of what is written. This is not an afficionado vs casual reader issue. Someone who knows this topic please edit it to make it at least a little readable


-------------------------- <small><span class="autosigned">—Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[User:Ravi2445|Ravi2445]] ([[User talk:Ravi2445|talk]] • [[Special:Contributions/Ravi2445|contribs]]) 02:59, 10 July 2010 (UTC)</span></small><!-- Template:Unsigned --> <!--Autosigned by SineBot-->

== Proposal to add a section that discusses policy applying prospect theory (loss aversion) within our educational system. ==

Prospect theory, specifically loss aversion has recently been tested by notable scholars and more recently by Dr. Roland Fryer and has shown positive behavior change of educators within the educational system. I would like to add a section showing other applications of prospect theory within this setting. I have been studying within the field of education and administration for the last 10 years and I hold a doctorate in Educational leadership and Administration from an accredited university in the U.S. I do not plan to add any independent research within this topic and will present my additions in a neutral and verifiable manner. Please let me know if there are any comments, suggestions, or objections to my intended addition. Fmerenda 19:57, 11 December 2012 (UTC) <small><span class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[User:Fmerenda|Fmerenda]] ([[User talk:Fmerenda|talk]] • [[Special:Contributions/Fmerenda|contribs]]) </span></small><!-- Template:Unsigned --> <!--Autosigned by SineBot-->

In the absence of any objections I will begin to add a section regarding the above research utilizing loss aversion from behavioral economics to illustrate a policy that relies upon a specifically framed merit pay intervention.Fmerenda 05:39, 12 December 2012 (UTC) <small><span class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[User:Fmerenda|Fmerenda]] ([[User talk:Fmerenda|talk]] • [[Special:Contributions/Fmerenda|contribs]]) </span></small><!-- Template:Unsigned --> <!--Autosigned by SineBot-->

: Hi, firstly, if you do not have an account I suggest you get one and then sign any comments/posts/edits etc you make so that you can stay advised of responses etc. Regarding your proposal for adding a section it sounds to me that a simple note as to the application you refer to would suffice. I suggest that the aricle is about the theory itself rather than about any specific application or illustrations of it so any addition you wish to make should stay focused and on topic. An example of the way this could be done would be to use the research you refer to as a citation to substantiate the pertinent statements in the article as it stands. --[[User:LookingGlass|LookingGlass]] ([[User talk:LookingGlass|talk]]) 20:34, 12 December 2012 (UTC)

Hi, thank you for your feedback. I respectfully disagree however, I believe adding content to explain its application and using real-world examples should be more than a simple note. The article as it stands has a section entitled application, but does not provide any examples of its application. Additionally, reading the other comments, it seems many people do not fully understand prospect theory and providing examples of its application may assist with clarity. Thoughts? Fmerenda 00:54, 13 December 2012 (UTC) <small><span class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[User:Fmerenda|Fmerenda]] ([[User talk:Fmerenda|talk]] • [[Special:Contributions/Fmerenda|contribs]]) </span></small><!-- Template:Unsigned --> <!--Autosigned by SineBot-->

: I apologise, you seem to have an account. Please sign your comments with four tilds "~" or by clicking on the pen icon in the menu bar of the comment box.

: Regarding your proposals, an example should be subservient to that which it is an example of. The key is balance. As the article sets out: "Prospect theory is a behavioral economic theory that describes decisions between alternatives that involve risk, where the probabilities of outcomes are known". Your example is of its application in a particular field however it can be applied in any field.

: In my opinion the cause of the article's lack of clarity is that the article doesn't align with wiki style guidelines. In these it is recommended that articles proceed from the general to the specific in such a way that the subject can be understood by a general non-specialist reader. As it is, the article lacks an adequate introduction, has no sections that expand on the introduction, or adequately explain its history and development, etc. Instead, the article quickly moves into a technical formula and brief explantion/description rather than any general introduction. The article also has no in-line references/citations. Those references that are given are non-specific and so cannot be reasonably verified or tied to the text. The style of the article is not encyclopedic but rather colloqial and chatty, like a magazine article in my opinion. If these matters were addressed any need to fill out the examples section would be significantly reduced.

: Finally, I think that consideration should be given to either creating new articles, if the subject of the example is substantive, or of adding into other pertinent articles sections on the use of Prospect Theory in their topic.
: [[User:LookingGlass|LookingGlass]] ([[User talk:LookingGlass|talk]]) 19:32, 13 December 2012 (UTC)


I agree that the article could be more aligned with the items you mentioned for clarity purposes, readability, and wiki style guidelines. Those issues need to be addressed. However, I still feel that giving real-world applications within any field will also help. It isn't the fact that it can be utilized in various manners/fields, but more importantly how it is used and the behavioral reasoning of why it works. By providing examples in Education and of course others can add other fields it has been applied to, may enable readers to put it all together. Thoughts? Fmerenda 04:16, 14 December 2012 (UTC) <small><span class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[User:Fmerenda|Fmerenda]] ([[User talk:Fmerenda|talk]] • [[Special:Contributions/Fmerenda|contribs]]) </span></small><!-- Template:Unsigned --> <!--Autosigned by SineBot-->

: Fmerenda, you seem either to not understand or to disregard the two points I made, both of which regard wiki practice:
: 1. You continue to NOT to sign your comments.
: 2. "an example should be subservient to that which it is an example of". I see no purpose in reiterating an expansion of that.
: --[[User:LookingGlass|LookingGlass]] ([[User talk:LookingGlass|talk]]) 06:10, 14 December 2012 (UTC)



This article misrepresents EU by saying that it is THE model of rational decision-making for uncertain prospects. It furthermore implies that concavity of the utility function is a part of expected utility theory. A better understanding is that once we have expected utility, we can make assumptions about its objects, e.g. the shape of the utility function, properties of beliefs (in SEU), and so forth. It misrepresents prospect theory by not accurately describing its deviation from EU and its implicit assertion that it is not "rational".
I do respectfully disagree again, yet I do understand what you are stating. I do think the topic should be made clearer, but additionally an example of the topic is just as important, if not more to provide clarity for the readers. It doesn't have to be one or another.
: You disagree and yet do not say with WHAT! I have NOT written that examples CANNOT provide clarity. [[User:LookingGlass|LookingGlass]] ([[User talk:LookingGlass|talk]]) 12:37, 15 December 2012 (UTC)


(Schmeidler provides an axiomatic characterization of a class of decision theories, CEU, that includes re-weighting probabilities, generalizing EU by allowing for the taking of expectations with respect to non-negative and monotonic set functions rather than just those with the additional property of additivity. This class of preferences includes cumulative prospect theory and therefore rank-dependent EU as well. Here the axiomatization is illuminating because we see that the key difference between EU and CEU is the relaxation of independence to comonotonic independence. Compare the two theorems on Schmeidler Econometrica 1989 p 578.) <!-- Template:Unsigned IP --><small class="autosigned">—&nbsp;Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/68.175.128.221|68.175.128.221]] ([[User talk:68.175.128.221#top|talk]]) 16:14, 1 February 2021 (UTC)</small> <!--Autosigned by SineBot-->
Not sure why when I sign the comments, it is not appearing that way all the time.
: Sign your articles by clicking the icon (at the top) OR just type four tilds "~". Do '''ONLY''' one of these and you will have no problem. [[User:LookingGlass|LookingGlass]] ([[User talk:LookingGlass|talk]]) 12:37, 15 December 2012 (UTC)


== Note to reviewers ==
Although I appreciate the comments of "LookingGlass", I would also appreciate others points of view as well, in order to make an informed decision regarding my addition and how the COMMUNITY feels about it. Fmerenda 16:07, 14 December 2012 (UTC)
Fmerenda 16:07, 14 December 2012 (UTC) <small><span class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[User:Fmerenda|Fmerenda]] ([[User talk:Fmerenda|talk]] • [[Special:Contributions/Fmerenda|contribs]]) </span></small><!-- Template:Unsigned --> <!--Autosigned by SineBot-->
Fmerenda 05:58, 15 December 2012 (UTC)
: You ask for comment but do not address what is offered. What, exactly, are you seeking? [[User:LookingGlass|LookingGlass]] ([[User talk:LookingGlass|talk]]) 12:37, 15 December 2012 (UTC)


There should only be one banner on this page per wikiproject. We shouldn't have three different Wikiproject Economics banners, each giving it a different quality rating and importance. Anyone is welcome to review the article and change its quality rating or importance rating to a wikiproject, but you do this by changing the existing ratings, not adding a new banner. It's like when a journal receives different reviews of a paper from different reviewers. It can't make multiple decisions; it has to integrate the different reviewers' feedback into one decision to accept/ reject/ etc. [[User:MartinPoulter|MartinPoulter]] ([[User talk:MartinPoulter|talk]]) 13:39, 17 October 2020 (UTC)
Hi:


== Assessment of Article ==
I beleive I have addressed the comments thus far. Just because I don't agree with the comments made, doesn't mean I haven't addressed them and have not provided the reasons I don't agree. The article needs edits in many areas for clarity, I would like to address the clarity issue by providing real-world examples in a devoted section. Since it seems you want to address other areas of the article, and do not agree with my reasoning, I respectfully welcome comments and perspectives from others, so an informed decision can be made, based on how more than one member of the community feels. Fmerenda 22:14, 18 December 2012 (UTC)
Fmerenda 22:14, 18 December 2012 (UTC)


I rated this article as being of Mid-importance and C quality. I think Prospect Theory is a useful concept in economics, but I think that lay people wouldn’t be as interested in it as someone who’s either an economist or is studying economics. Although, I think it would be of a higher importance in the field of behavioural economics. The article provides a good, broad overview of prospect theory, but I think it could be improved to include better, more thorough explanations. It’s formatted well, referenced well and the writing is easy to understand and flows well. <!-- Template:Unsigned --><small class="autosigned">—&nbsp;Preceding [[Wikipedia:S4481760|S4481760]] comment added by [[User:S4481760|S4481760]] ([[User talk:S4481760#top|talk]] • [[Special:Contributions/S4481760|contribs]]) 03:57, 31 October 2020 (UTC)</small> <!--Autosigned by SineBot-->
== Template tag - Multiple issues ==


==Wiki Education assignment: Evolution of Modern Economic Theory==
In my opinion the article lacks clarity as it doesn't align with wiki style guidelines. In these it is recommended that articles proceed from the general to the specific in such a way that the subject can be understood by a general non-specialist reader. As it is, the article lacks an adequate introduction, has no sections that expand on the introduction, or adequately explain its history and development, etc. Instead, the article quickly moves into a technical formula and brief explantion/description rather than any general introduction.
{{dashboard.wikiedu.org assignment | course = Wikipedia:Wiki_Ed/University_of_New_England/Evolution_of_Modern_Economic_Theory_(Fall) | assignments = [[User:Tommymcguire21|Tommymcguire21]] | reviewers = [[User:Bambam2025|Bambam2025]], [[User:Anonymous1234543210|Anonymous1234543210]], [[User:Tommymcguire21|Tommymcguire21]], [[User:Oceansprings|Oceansprings]] | start_date = 2024-08-30 | end_date = 2024-12-06 }}


<span class="wikied-assignment" style="font-size:85%;">— Assignment last updated by [[User:Anonymous1234543210|Anonymous1234543210]] ([[User talk:Anonymous1234543210|talk]]) 19:59, 14 October 2024 (UTC)</span>
The article also has no in-line references/citations. Those references that are given are non-specific and so cannot be reasonably verified or tied to the text. The style of the article is not encyclopedic but rather colloqial and chatty, like a magazine article in my opinion.
: [[User:LookingGlass|LookingGlass]] ([[User talk:LookingGlass|talk]]) 19:35, 13 December 2012 (UTC)

Latest revision as of 19:59, 14 October 2024

stuff removed

[edit]

Is there a reason this article has been removed? Dieter Simon 23:30 12 Jun 2003 (UTC)

I've removed this dead link

we need something good to replace it TitaniumDreads 14:15, 9 Jun 2005 (UTC)

Another negative comment on the content

[edit]

"Thus, contrary to the expected utility theory (which models the decision that perfectly rational agents would make), prospect theory aims to describe the actual behavior of people." This is an incorrect understanding of both EU and prospect theory. Prospect theory has three parts: 1) outcomes are measured relative to a status quo - gains and losses, 2) the utility of net gains is not concave throughout but concave for positive net gains and convex for negative net gains, and 3) re-weighting of probabilities. 1) and 2) are completely consistent with expected utility. There is nothing in Savage, Anscombe-Aumann, or (for the non-subjective theory) Herstein and Milnor that says outcomes have to be absolute rather than relative to a status quo, or that the utility function has to have a particular shape. The only deviation from EU is 3). But even with re-weighting, the outcome is a complete, transitive and reflexive weak preference relation on a universe of alternatives, which is the conventional understanding of rational choice.

This article misrepresents EU by saying that it is THE model of rational decision-making for uncertain prospects. It furthermore implies that concavity of the utility function is a part of expected utility theory. A better understanding is that once we have expected utility, we can make assumptions about its objects, e.g. the shape of the utility function, properties of beliefs (in SEU), and so forth. It misrepresents prospect theory by not accurately describing its deviation from EU and its implicit assertion that it is not "rational".

(Schmeidler provides an axiomatic characterization of a class of decision theories, CEU, that includes re-weighting probabilities, generalizing EU by allowing for the taking of expectations with respect to non-negative and monotonic set functions rather than just those with the additional property of additivity. This class of preferences includes cumulative prospect theory and therefore rank-dependent EU as well. Here the axiomatization is illuminating because we see that the key difference between EU and CEU is the relaxation of independence to comonotonic independence. Compare the two theorems on Schmeidler Econometrica 1989 p 578.) — Preceding unsigned comment added by 68.175.128.221 (talk) 16:14, 1 February 2021 (UTC)[reply]

Note to reviewers

[edit]

There should only be one banner on this page per wikiproject. We shouldn't have three different Wikiproject Economics banners, each giving it a different quality rating and importance. Anyone is welcome to review the article and change its quality rating or importance rating to a wikiproject, but you do this by changing the existing ratings, not adding a new banner. It's like when a journal receives different reviews of a paper from different reviewers. It can't make multiple decisions; it has to integrate the different reviewers' feedback into one decision to accept/ reject/ etc. MartinPoulter (talk) 13:39, 17 October 2020 (UTC)[reply]

Assessment of Article

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I rated this article as being of Mid-importance and C quality. I think Prospect Theory is a useful concept in economics, but I think that lay people wouldn’t be as interested in it as someone who’s either an economist or is studying economics. Although, I think it would be of a higher importance in the field of behavioural economics. The article provides a good, broad overview of prospect theory, but I think it could be improved to include better, more thorough explanations. It’s formatted well, referenced well and the writing is easy to understand and flows well. — Preceding S4481760 comment added by S4481760 (talk • contribs) 03:57, 31 October 2020 (UTC)[reply]

Wiki Education assignment: Evolution of Modern Economic Theory

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This article was the subject of a Wiki Education Foundation-supported course assignment, between 30 August 2024 and 6 December 2024. Further details are available on the course page. Student editor(s): Tommymcguire21 (article contribs). Peer reviewers: Bambam2025, Anonymous1234543210, Tommymcguire21, Oceansprings.

— Assignment last updated by Anonymous1234543210 (talk) 19:59, 14 October 2024 (UTC)[reply]

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