Dirk Niepelt

In his blog A Fine Theorem, Kevin Bryan discusses the history of economic thought leading from the classical economists and Walras to Arrow and Debreu. My read of the literature on GE following Arrow is as follows. First, the theory of general equilibrium is an incredible proof that markets can, in theory and in certain cases, work as efficiently as an all-powerful planner. That said, the three other hopes of general equilibrium theory since the days of Walras are, in fact, disproven by...

In the FT (Alphaville), Marcello Minnena explains what type of currency denominations of Euro area sovereign debt constitute credit events; and how markets assess the risk of such denominations. After the Greek default in 2012 new ISDA standards entered into force: contracts made since 2014 protect against euro area countries redenominating their debt into new national currencies [unless the debt is redenominated] into a reserve currency: the US dollar, the Canadian dollar, the British...

In the FT, David Pilling reports about Somalia which has managed without central bank issued money for decades. … up to 98 per cent of local banknotes are fake … With the help of the International Monetary Fund, Mogadishu plans to print official banknotes for the first time in more than a quarter of a century … No official Somali currency has left the presses since the Horn of Africa nation descended into clan warfare after the collapse of the government in 1991. … warlords, businessmen...

A blog post on Random Critical Analysis argues that high wealth (proxied by high consumption) rather than GDP explains US health care expenditures. Total per capita health care spending increases as wealth increases because people actually demand more goods and services (volume) per capita and because it is relatively labor intensive sector that does not enjoy the productivity gains found in some other sectors of the economy, i.e., overall costs increase through both volume and price...

In separate blog posts, Russ Roberts and John Cochrane have called for humility on the part of economists. Asking “What do economists know?,” Roberts and Cochrane point out—correctly—that economics is not as strong on quantification as some economists and many pseudo economists pretend, and as is often expected from economists. Economics is not the same as applied statistics although the latter can help clarify, at least to some extent, the empirical relevance of economic theories....

In the FT, Mehreen Khan reports about the resurgence of deposit flight.

The Economist reports about the fintech revolution in China. By just about any measure of size, China is the world’s leader in fintech (short for “financial technology”, and referring here to internet-based banking and investment). It is far and away the biggest market for digital payments, accounting for nearly half of the global total. It is dominant in online lending, occupying three-quarters of the global market. A ranking of the world’s most innovative fintech firms gave Chinese...

In the FT, Tim Harford (here) and Martin Sandbu (here) review Kenneth Arrow’s monumental contributions to economics.

MA course at the University of Bern. The classes follow chapters 11–13 in this text (to be updated) and build on the material covered in chapters 1–5. Uni Bern’s official course page. The course TA is Christian Myohl. Main contents: Concepts. RA model with government spending and taxes. Government debt in RA model. Government debt and social security in OLG model. Neutrality results. Consolidated government budget constraint. Fiscal effects on inflation. Game of chicken. FTPL. Active and...

Sweden’s tabloid Aftonbladet (in English) about what happened on Friday, 17 February 2017 in Sweden (nothing extraordinary).