Monday, February 9, 2009

The science contributes to feedback, which biases the science.

From Free Exchange:

"New economics
Posted by:
Economist.com | WASHINGTON
Categories:
Heterodoxies

IN RECENT decades, economists have relished their role as departmental imperialists, extending economic analysis to questions of sociology, psychology, criminology, and a range of other subjects. Economists love annoying people, and so the annoyance this caused among sociologists, psychologists, and so on made such imperial forays highly rewarding.

But increasingly, the shoe is on the other foot. Economics (parts of it, at least) is broken, and mathematicians, sociologists, psychologists, and a bevy of other armchair -ologists are trying to fix it. At the Times, Anatole Kaletsky describes just a few of the ongoing attempts to bring knowledge from other disciplines into the dismal science. He mentions work done by students of aerodynamics and behavioural scientists, among others. But the most intriguing idea in the piece is that while it's possible our ideas are failing to accurately describe the economy, it could also be the case that the economy is failing because it's built on our inaccurate ideas:

[R]ational investors can find it very profitable to act on false premises - for example that credit will always be available without limit - if these false ideas become so widely accepted that they change the way the economy actually functions, at least for a time...

[T]he challenge that existing economic orthodoxy may find most disconcerting is Imperfect Knowledge Economics (IKE), the name of a path-breaking recent book by Roman Frydman and Michael Goldberg, two American economists. Building on ideas of Edmund Phelps, one of the few Nobel Laureate economists who rejected the consensus view on rational expectations, IKE uses similar tools to conventional economics to generate radically different results. It insists that the future is inherently unknowable and therefore that there is always a multitude of plausible models of the way the economy works.

Which model is right may well depend upon which model is the current dominant paradigm. This is quite headache-inducing. It suggests that economics may be plagued by observer effects; by investigating one aspect of a system and solidifying knowledge about it into widely held principles, we reinforce those principles, which proceed to work until they don't.

This is the inherent risk in studying a complex system constructed on the aggregated decisions of billions of creatures who base their actions on the actions of everyone else. The science contributes to feedback, which biases the science. Ideally, some brilliant individual will discover a way around this hurdle. In any case, the first lesson economists may learn in the wake of the crisis is that they actually know much less than they think they do. Or rather, they know what they know, only so long as other people continue to know it."

Me:

I base my understanding of Human Agency Explanations in Economics on the work of Anthony Giddens, especially this book:

In New Rules of Sociological Method (1976) (the title of which alludes to Durkheim's Rules of the Sociological Method of 1895) Giddens attempted to explain 'how sociology should be done' and addressed a long-standing divide between those theorists who prioritise 'macro level' studies of social life - looking at the 'big picture' of society - and those who emphasise the 'micro level' - what everyday life means to individuals. In New Rules... he noted that the functionalist approach, invented by Durkheim, treated society as a reality unto itself, not reducible to individuals. He rejected Durkheim's sociological positivism paradigm, which attempted to identify laws which will predict how societies will operate, without looking at the meanings understood by individual actors in society. He contrasted Durkheim with Weber's approach - interpretative sociology - focused on understanding agency and motives of individuals. Giddens is closer to Weber than Durkheim, but in his analysis he rejects both of those approaches, stating that while society is not a collective reality, nor should the individual be treated as the central unit of analysis.[2] "Society only has form, and that form only has effects on people, insofar as structure is produced and reproduced in what people do".[3] Rather he uses the logic of hermeneutic tradition (from interpretative sociology) to argue for the importance of agency in sociological theory, claiming that human social actors are always to some degree knowledgeable about what they are doing. Social order is therefore a result of some pre-planned social actions, not automatic evolutionary response. Sociologists, unlike natural scientists, have to interpret a social world which is already interpreted by the actors that inhabit it. Thus, there is a "Duality of structure", according to Giddens. With that he means that social practice, which is the principal unit of investigation, has both a structural and an agency-component: The structural environment constrains individual behaviour, but also makes it possible. He also notes the existence of a specific form of a social cycle: once sociological concepts are formed, they filter back into everyday world and change the way people think. Because social actors are reflexive and monitor the ongoing flow of activities and structural conditions, they adapt their actions to their evolving understandings. As a result, social scientific knowledge of society will actually change human activities. Giddens calls this two-tiered, interpretive and dialectical relationship between social scientific knowledge and human practices the "double hermeneutic".

Giddens also stressed the importance of power, which is means to ends, and hence is directly involved in the actions of every person. Power, the transformative capacity of people to change the social and material world, is closely shaped by knowledge and space-time.[4]

In New Rules... Giddens specifically wrote[5] that:

* Sociology is not about a 'pre-given' universe of objects, the universe is being constituted -or produced by- the active doings of subjects.
* The production and reproduction of society thus has to be treated as a skilled performance on the part of its members.
* The realm of human agency is bounded. Individuals produce society, but they do so as historically located actors, and not under conditions of their own choosing.
* Structures must be conceptualized not only as constraints upon human agency, but also as enablers.
* Processes of structuration involve an interplay of meanings, norms and power.
* The sociological observer cannot make social life available as 'phenomenon' for observation independently of drawing upon his knowledge of it as a resource whereby he constitutes it as a 'topic for investigation'.
* Immersion in a form of life is the necessary and only means whereby an observer is able to generate such characterizations.
* Sociological concepts thus obey a double hermeneutic.
* In sum, the primary tasks of sociological analysis are the following: (1) The hermeneutic explication and mediation of divergent forms of life within descriptive metalanguages of social science; (2) Explication of the production and reproduction of society as the accomplished outcome of human agency.
2/9/2009 5:03 PM GST

No comments: