Carvalho - "The Paths to Narrow Identities" 2021

"The Dasgupta-Goyal Model of Narrow Identities"

Seeking the logic(s) in the 'health career' model

  

 

 Self - Individual - Person
|

 INTERPERSONAL    :     SCIENCES               

HUMANISTIC ----------------------------------  MECHANISTIC

SOCIOLOGY  :   POLITICAL 

|

Community - Group - Population

"DG recognize that narrow identities form through social interactions and that groups play an important role in this process. This is a major advance. Because narrow identities are an equilibrium phenomenon they cannot be undone through individual will and right thinking alone. Specifically, DG’s model consists of a finite population of individuals, N, and two groups, A and B. Individuals and groups are ex ante identical. Individuals can choose to join one or both of the groups. Only the extensive margin (membership) is considered, not the time or effort devoted to each group. The payoff from joining group k ∈{A, B} is increasing in the size of group k and is also a function of the size of the other group k′ ≠ k. An individual i is said to have a narrow identity if i joins only one of the groups. Society can be said to have narrow identities when each individual i ∈ N joins exactly one group. Note that narrow identities can exist in a monomorphic equilibrium (where all individuals join one group) or a polymorphic equilibrium (where different individuals join different groups)." p.79.

 

Jean-Paul Carvalho. The Paths to Narrow Identities. Erasmus Journal for Philosophy and Economics,Volume 14, Issue 2,Winter 2021, pp. 77–86. https://doi.org/10.23941/ejpe.v14i2.615 

The above paper is part of an "ARTICLE SYMPOSIUM on “Narrow Identities”.

'health career' - life chances. 

My source: @PhilosL @LiverpoolPhilos

 

Two Triangles: Fire and Bubbles

individual

|

INTERPERSONAL : SCIENCES

humanistic ----------------------------------------------- mechanistic

SOCIOLOGY : POLITICAL

|

group

	O2 Fuel Heat
	Marketability of Assets Expansionary money and credit Intense speculation

My source:

Plender, J. (2020) Bubble, bubble, toil and trouble, Life & Arts, FT Weekend, 7-8 November. p.7.

Review of -

Levenson, T. (2020) Money for Nothing: The South Sea Bubble and the Invention of Modern Capitalism, London: Head of Zeus.

Quinn, W. Turner, J.D. (2020) Boom and Bust: A Global History of Financial Bubbles, Cambridge: Cambridge University Press. (This post draws upon a triangle in this book explained by Plender).

Sticking with 'nudge' - behaviour and economics ...

individual

|

INTERPERSONAL : SCIENCES

humanistic ----------------------------------------------- mechanistic

SOCIOLOGY : POLITICAL

|

group - population

psychological realism cognition

neoclassical model "The most well-known critique of behavioural economics comes from a psychologist, Gerd Gigerenzer of the Max Planck Institute for Human Development. Gigerenzer argues that it is pointless to keep adding frills to a mathematical account of human behaviour that, in the end, has nothing to do with real cognitive processes. ... He [Laibson] concedes that Gigerenzer has a point but adds: 'Gerd's models of heuristic decision-making are great in the specific domains for which they are designed but they are not general models of behaviour.'" "There is a tendency to propose some new theory to explain each new fact. The world doesn't need a thousand different theories to explain a thousand different facts. At some point there needs to be a discipline of trying to explain many facts with one theory." [David K Levine, Is Behavioural Economics Doomed?, 2012]

social proof Source: Financial Times

behavioural  economics "The challenge for behavioural economics is to elaborate on the neoclassical model to deliver psychological realism without collapsing into a mess of special cases. Some say that the most successful special case comes from Harvard's David Laibson. It is a mathematical tweak designed to represent the particular brand of short-termism that leads us to sign up for the gym yet somehow never quite get around to exercising. It's called "hyperbolic discounting", a name that refers to a mathematical curve, and which says much about the way behavioural economists represent human psychology."

Harford, T. (2014) Nudge or fudge? Life&Arts, Financial Times, 22-23 March. pp.1-2.

Clearly indoors, clearing papers ...