Lars P. Syll

Along with the Arrow-Debreu existence theorem and some results on regular economies, SMD (Sonnenschein-Mantel-Debreu) theory fills in many of the gaps we might have in our understanding of general equilibrium theory … It is also a deeply negative result. SMD theory means that assumptions guaranteeing good behavior at the microeconomic level do not carry over to the aggregate level or to qualitative features of the equilibrium. It has been difficult to make progress on the...

Om kvantitet och kvalitet i högskolevärlden Den som kommer in på högskolan ska också gå ut med avlagd examen, anser regeringen. Enligt Helene Hellmark Knutsson (S), minister för högre utbildning, ska universitet och högskolor “se till att när man väl kommit in på sin utbildning, har sin behörighet, att man också får det stöd man behöver för att fullfölja sina studier”. Det låter lite väl enkelt. Högskolelagens nuvarande formulering om att högskolorna ska...

The conundrum of unknown unknowns Short-term weather forecasting is possible because most of the factors that determine tomorrow’s weather are, in a sense, already there … But when you look further ahead you encounter the intractable problem that, in non-linear systems, small changes in initial conditions can lead to cumulatively larger and larger changes in outcomes over time. In these circumstances imperfect knowledge may be no more useful than no...

When ignorance is bliss The production function has been a powerful instrument of miseducation. The student of economic theory is taught to write Q = f(L, K) where L is a quantity of labor, K a quantity of capital and Q a rate of output of commodities. He is instructed to assume all workers alike, and to measure L in man-hours of labor; he is told something about the index-number problem in choosing a unit of output; and then he is hurried on to the next...

 [embedded content] One of my absolute favourite movies. Great, true, story. Marvelous actors — Russell Crowe, Al Pacino, Christopher Plummer. Fabulous music by e.g. Lisa Gerrard and Jan Garbarek. div{float:left;margin-right:10px;} div.wpmrec2x div.u > div:nth-child(3n){margin-right:0px;} ]]> Advertisements

What so many critiques of economics gets right Yours truly had a post up the other day on John Rapley’s Twilight of the Money Gods. In the main I think Rapley is right in his attack on contemporary economics and its ‘priesthood,’ although he often seems to forget that there are — yes, it’s true — more than one approach in economics, and that his critique mainly pertains to mainstream neoclassical economics. Noah Smith, however, is not too happy about the...

Ricardo’s trade paradigm — a formerly true theory Two hundred years ago, on 19 April 1817, David Ricardo’s Principles was published. In it he presented a theory that was meant to explain why countries trade and, based on the concept of opportunity cost, how the pattern of export and import is ruled by countries exporting goods in which they have comparative advantage and importing goods in which they have a comparative disadvantage. Although a great...

The balanced budget paradox The balanced budget paradox is probably one of the most devastating phenomena haunting our economies. The harder politicians — usually on the advise of establishment economists — try to achieve balanced budgets for the public sector, the less likely they are to succeed in their endeavour. And the more the citizens have to pay for the concomitant austerity policies these wrong-headed politicians and economists recommend as “the...

Why testing axioms is necessary in economics Of course the more immediate target of Davidson in his formulation of the argument in the early 1980s was not Samuelson, but Lucas and Sargent and their rational expectations hypothesis … This was indeed the period when new classical economics was riding at its highest point of prestige, with Lucas and Sargent and their rational expectations assumption apparently sweeping the boards of any sort of Keynesian...

Are methodological discussions risky? Most mainstream economists are reluctant to have a methodological discussion. They usually think it’s too ‘risky.’ Well, maybe it is. But on the other hand, if we’re not prepared to take that risk, economics can’t progress, as Tony Lawson forcefully argues in his Essays on the Nature and State of Modern Economics: Twenty common myths and/or fallacies of modern economics 1. The widely observed crisis of the modern...