On the non-validity of incremental validity A common goal of statistical analysis in the social sciences is to draw inferences about the relative contributions of different variables to some outcome variable. When regressing academic performance, political affiliation, or vocabulary growth on other variables, researchers often wish to determine which variables matter to the prediction and which do not—typically by considering whether each variable’s...
Read More »Lindeberg-Levy CLT (student stuff)
Lindeberg-Levy CLT (student stuff) [embedded content]
Read More »A philosophical look at economics
A philosophical look at economics Owing to the elegance of explanations in natural science, scientists in other disciplines are likely to be tempted to emulate this success. While that is a good thing in the sense of striving to observe the four criteria or coherence, correspondence, practicality and economy, it is not a good thing if scientists doing life or social science become unmindful of the limitations imposed by the subject matter of their...
Read More »Econometric fundamentalism
The wide conviction of the superiority of the methods of the science has converted the econometric community largely to a group of fundamentalist guards of mathematical rigour. It is often the case that mathemical rigour is held as the dominant goal and the criterion for research topic choice as well as research evaluation, so much so that the relevance of the research to business cycles is reduced to empirical illustrations. To that extent, probabilistic formalization has...
Read More »And one day there will be no more frontier (personal)
And one day there will be no more frontier (personal) [embedded content] In loving memory of my brother, Peter ‘Uncas’ Pålsson.
Read More »Statistical inference — a self-imposed limitation
Statistical inference — a self-imposed limitation The tool of statistical inference becomes available as the result of a self-imposed limitation of the universe of discourse. It is assumed that the available observations have been generated by a probability law or stochastic process about which some incomplete knowledge is available a priori … It should be kept in mind that the sharpness and power of these remarkable tools of inductive reasoning are bought...
Read More »Economics — more like phrenology than physics
Economics — more like phrenology than physics What made phrenology so popular was what also made economics so popular at the time: it gave a rationale for a society based on Progress and also provided a blueprint for how this could be achieved. The phrenological doctrine, being so vague in its pronouncements, was highly malleable and could be used to justify whatever those in power needed justifying. So, for example, in 19th century England phrenology was...
Read More »Why sunspots matter
My recent research with Carine Nourry and Alain Venditti argues that while there are strong reasons for believing there are no free lunches left uneaten by bonus-hungry market participants, there are really no reasons for believing that this will lead to Pareto efficiency, except, perhaps, by chance … In our model environment, booms and crashes occur simply as a consequence of the animal spirits of market participants. Why should we care if there are big movements in the...
Read More »Reality virus strikes economics!
Reality virus strikes economics! The WHO today warned of a virulent new virus affecting vulnerable groups in the Mid-West and Eastern USA. The outbreak, which began in the Mid-West’s extensive Great Lakes ‘Freshwater’ river system, has recently jumped the ‘Saltwater’ barrier, meaning that the entire population of its target species – ‘Mainstream’ economists – is now at risk. Speaking on behalf of the WHO, Dr Cahuc explained that the virus works by turning...
Read More »New Keynesianism — neither new nor Keynesian
New Keynesianism — neither new nor Keynesian Maintaining that economics is a science in the ‘true knowledge’ business, I remain a skeptic of the pretences and aspirations of ‘New Keynesian’ macroeconomics. So far, I cannot really see that it has yielded very much in terms of realist and relevant economic knowledge. And there’s nothing new or Keynesian about it. ‘New Keynesianism’ doesn’t have its roots in Keynes. It has its intellectual roots in Paul...
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