Tag Archives: Economics

In The World in the Model Mary Morgan characterizes the modelling tradition of economics as one concerned with “thin men acting in small worlds” and writes: Strangely perhaps, the most obvious element in the inference gap for models … lies in the validity of any inference between two such different media – forward from the real world to the artificial world of the mathematical model and back again from the model experiment to the real material of the economic world. The model...

Trump and free trade Dear President Trump, Plenty of people will try to convince you that globalization and free trade could benefit everyone, if only the gains were more fairly shared … This belief is shared by almost all politicians in both parties, and it’s an article of faith for the economics profession. You are right to reject it … It’s a fallacy based on a fantasy, and it has been ever since David Ricardo dreamed up the idea of “Comparative Advantage...

Poverty — the Dumb and Dumber version A few years ago, two economics professors, Quamrul Ashraf and Oded Galor, published a paper, “The ‘Out of Africa’ Hypothesis, Human Genetic Diversity, and Comparative Economic Development,” that drew inferences about poverty and genetics based on a statistical pattern … When the paper by Ashraf and Galor came out, I criticized it from a statistical perspective, questioning what I considered its overreach in making...

By James Kwak One point I try to be clear about in my new book is that economism—the assumption that simple Economics 101 models accurately describe the real world—is not the same as economics. There are people who think that all of economics, or at least all of modern, mathematically inclined, “neoclassical” economics, is at fault for the growth of neoliberal capitalism and the increase in inequality in rich countries. I am not one of them. In my mind, the problem is knowing just a...

By James Kwak One point I try to be clear about in my new book is that economism—the assumption that simple Economics 101 models accurately describe the real world—is not the same as economics. There are people who think that all of economics, or at least all of modern, mathematically inclined, “neoclassical” economics, is at fault for the growth of neoliberal capitalism and the increase in inequality in rich countries. I am not one of them. In my mind, the problem is knowing just a...

Public debt and economic growth Towering debts, rapidly rising taxes, constant and expensive wars, a debt burden surpassing 200% of GDP. What are the chances that a country with such characteristics would grow rapidly? Almost anyone would probably say ‘none’. And yet, these are exactly the conditions under which the Industrial Revolution took place in Britain. Britain’s government debt went from 5% of GDP in 1700 to over 200% in 1820, it fought a war in one...

The golden rule of public debt Nation states borrow to provide public capital: For example, rail networks, road systems, airports and bridges. These are examples of large expenditure items that are more efficiently provided by government than by private companies. The benefits of public capital expenditures are enjoyed not only by the current generation of people, who must sacrifice consumption to pay for them, but also by future generations who will travel...

Take your epsilon and shove it! Given that a normative theory is defined as a theory prescribing how a rational agent should act, neoclassical economic theory certainly has to be considered a normative theory. The problem is — besides that it standardly assumes not only rationality and selfishness, but also e. g. common knowledge of people’s utility functions — that loads of research show that people almost never act in accordance with the theory: There is...

A debate on negative interest rates. YES, Thomas Palley: “One can have too much of a good thing”. NO, Adam Posen: “Negative interest rates have proved useful”. READ IT HERE

Thus your standard New Keynesian model will use Calvo pricing and model the current inflation rate as tightly coupled to the present value of expected future output gaps. Is this a requirement anyone really wants to put on the model intended to help us understand the world that actually exists out there? Thus your standard New Keynesian model will calculate the expected path of consumption as the solution to some Euler equation plus an intertemporal budget constraint, with...