Microeconomics

Friedrich von Hayek described the economist’s task as demonstrating how little we really know about what we imagine we can design

Every nation faces the challenge of imagining what a good life means. Sound nutrition, shelter, health care, personal safety, social stability, security of savings, clean air and water, and the development of children are among the elements of what many envision as vital to a happy and healthy society.

We are coming up to the fifth anniversary of the Lehman crash in September 2008. How bad was it? Have we fixed the problems?

In introducing game theory (in chapters 7-9), MWG build upon the theory of rational choice by individual agents, developed previously in the book to attempt to analyze (describe, explain, and even predict?) the interactions of such agents as well as the outcomes to which they give rise. In previous chapters, MWG discuss interactions only in the form of the arms-length interactions of numerous firms and consumers in specific markets (e.g. under ‘perfect competition’, in chapters 3 and 5).

Axiomatic bargaining is presented in MWG in the context of welfare economics (Ch. 22), the aim being the formulation of reasonable criteria for dividing gains resulting from cooperative endeavors (the “joint surplus”). It is further presented as an application of cooperative game theory, in which an arbitrator distributes the joint surplus in a manner that reflects “fairly” the bargaining strength of the different agents (although we could conceive of a situation where the parties are bargaining without an external party). If bargaining fails, the outcome is the parties’ own fallback positions (the threat point, or status quo).

The recent debate about the reproducibility of the results published by Carmen Reinhart and Kenneth Rogoff offers a showcase for the importance of replication in empirical economics.

“Look! Up there in the sky! What is it? Is it a plane? Is it a bird?” No, it’s a distraction from the robbery that is taking place in broad daylight on the ground.

“Taking advantage of the opportunity offered by the structural adjustments of the global economy…”The decisions on the four modernisations taken at the Third Plenum represented a radical change in Chinese domesticdevelopment strategy.

Political meritocracy is the idea that a political system is designed with the aim of selecting political leaders with above average ability to make morally informed political judgments. That is, political meritocracy has two key components: (1) the political leaders have above average ability and virtue and (2) the selection mechanism is designed to choose such leaders.

At the heart of economics is a theory of action. It reflects views about how human beings make economic decisions and leads to an analysis of aggregate consequences.

Neoclassical economics has abolished the role of psychology in decision making by assuming that all individuals are rational optimizers with rational expectations about future events.