Lars P. Syll

Simon Wren-Lewis — flimflam defender of economic orthodoxy Again and again, Oxford professor Simon Wren-Lewis rides out to defend orthodox macroeconomic theory against attacks from ‘heterodox’ critics like yours truly. A couple of years ago, it was the rational expectations hypothesis (REH) he wanted to save: It is not a debate about rational expectations in the abstract, but about a choice between different ways of modelling expectations, none of which...

Keynes’ devastating critique of econometrics Mainstream economists often hold the view that Keynes’ criticism of econometrics was the result of a sadly misinformed and misguided person who disliked and did not understand much of it. This is, however, nothing but a gross misapprehension. To be careful and cautious is not the same as to dislike. Keynes did not misunderstand the crucial issues at stake in the development of econometrics. Quite the contrary. He...

RBC models –the art of missing the point completely The real business cycle program is part of the larger new classical macroeconomic research program. Proponents of these models often promote them as models that provide satisfactory microfoundations for macroeconomics … The claim for providing microfoundations is largely based on the fact that new classical models in general, and real business cycle models in particular, model the representative agent as...

Robert Lucas and the triumph of empty formalism Vielleicht ist diese Grundperspektive der radikalen Trennung von Form und Gehalt hilfreich, einige zunächst überaus paradoxe Äußerungen von Lucas etwas zu erhellen. Erinnert man sich der Forderungen von Lucas, die Makroökonomik zwingend auf Basis der klassischen Postulate, die Lucas und Sargent (1978) als (a) „Markträumung“ und (b) „Eigennutz“ umrissen hatten, zu errichten, so erstaunt man doch angesichts...

Solow kicking Lucas and Sargent in the pants In opening the conference, Frank Morris mentioned his disappointment or disillusionment – which many others share – that the analytical success of the 1960s didn’t survive that decade. I think we all knew, even back in the 1960s, that as Geof put it, “inflation doesn’t wait for full employment.” These days inflation doesn’t even seem to care if full employment is going along on the trip … The question is: what...

When your day is night alone (personal)  [embedded content] To David and Tora with love Advertisements

The logical fallacy that good science builds on In economics most models and theories build on a kind of argumentation pattern that looks like this: Premise 1: All Chicago economists believe in REH Premise 2: Robert Lucas is a Chicago economist —————————————————————– Conclusion: Robert Lucas believes in REH Among philosophers of science this is treated as an example of a logically valid deductive inference (and, following Quine, whenever logic is used in...

Cutting wages is not the solution A couple of years ago yours truly had a discussion with the chairman of the Swedish Royal Academy of Sciences (yes, the one that yearly presents the winners of The Sveriges Riksbank Prize in Economic Sciences in Memory of Alfred Nobel). What started the discussion was the allegation that the level of employment in the long run is a result of people’s own rational intertemporal choices and that how much people work basically...

Which independent variables should be included in the equation? The goal is a “good fit” … How can a good fit be recognized? A popular measure for the satisfactoriness of a regression is the coefficient of determination, R2. If this number is large, it is said, the regression gives a good fit … Nothing about R2 supports these claims. This statistic is best regarded as characterizing the geometric shape of the regression points and not much more. The central difficulty with R2...

Debunking the NAIRU myth In our extended NAIRU model, labor productivity growth is included in the wage bargaining process … The logical consequence of this broadening of the theoretical canvas has been that the NAIRU becomes endogenous itself and ceases to be an attractor — Milton Friedman’s natural, stable and timeless equilibrium point from which the system cannot permanently deviate. In our model, a deviation from the initial equilibrium affects not...