Weber's Law and the Biological Evolution of Risk Preferences: The Selective Dominance of the Logarithmic Utility Function, 2002 Geneva Risk Lecture

The paper offers a proof that expected utility maximisation with logarithmic utility is a dominant preference in the biological selection process in the sense that a population following any other preference for decision-making under risk will, with a probability that approaches certainty, disappear relative to the population following this preference as time goes to infinity. The result is contrasted with Weber's and Fechner's Psychophysical Law which implies logarithmic sensation functions for objective physical stimuli.     

A Simple Model of Privately Profitable But Socially Useless Speculation

The paper presents a general equilibrium model of a pure exchange economy with stochastic endowments, in which speculation in the forward market is profitable and stabilizes prices but is useless from a welfare point of view. Reconciling the Siegel paradox with the theory of incomplete markets, we show that banning speculation by closing the forward market may increase social welfare. We also show that the addition of a market might reduce the gains from international trade for all participating countries.
JEL Classification Numbers: F10, F11, F19.     

Die Finanzielle Vorausschau 2007-2013: Grundlage für eine handlungsfähige EU?

Im Dezember 2005 haben sich die Regierungschefs der EU-Mitgliedstaaten auf einen Finanzrahmen für das EU-Budget der Jahre 2007 bis 2013 geeinigt. Wie ist diese Einigung zustande gekommen? Welche Schwerpunkte wurden gesetzt? Wie verteilen sich die Mittelflüsse zwischen Neumitgliedern und den alten Mitgliedstaaten der EU 15? Ist der Finanzrahmen das Ergebnis verkrusteter Entscheidungsstrukturen?     

Bundesverfassungsgericht und Krisenpolitik der EZB — Stellungnahmen der Ökonomen

In June 2013, the Federal Constitutional Court in Germany held an expert hearing on the suitability of ECB measures, such as the purchase of government bonds, and their compatibility with existing EU and German legislation. The statements of five invited experts are documented here. The authors comment on the path from the agreement that has laid down the basic rules for the euro area to a crisis-driven approach that seems to have forgotten these rules. The ECB policy holds many risks - above all that of financing public budgets almost without limits - for the stability of monetary and fiscal governance in the euro area. On the other hand, ECB measures can also be interpreted as a necessary means to comply with the ultimate task of the ECB, the defence of price stability. Hence the ECB’s crisis measures do not represent any intention to intervene in fiscal or economic policy measures, and after the crisis the ECB can return to a narrower interpretation of the role of a central bank. It should not be forgotten that the ECB measures bear high risks for the countries in trouble as well as for those countries supporting them.     

Agent-based financial markets and New Keynesian macroeconomics: a synthesis

We combine a simple agent-based model of financial markets and a New Keynesian macroeconomic model with bounded rationality via two straightforward channels. The result is a macroeconomic model that allows for the endogenous development of business cycles and stock price bubbles. We show that market sentiments exert important influence on the macroeconomy: Impulse-response functions of macroeconomic variables become more volatile which makes the effect of a given shock hard to predict. We also analyze the impact of different types of financial transaction taxes that are currently debated among policy makers (FTT, FAT, progressive FAT) and find that such taxes are well suited to stabilize the economy and raise funds from the financial sector as a contribution to the enormous costs created during the recent crisis. Our simulations suggest that the FTT leads to higher tax revenues and better stabilization results then the FAT. However, the FTT might also create huge distortion if set too high, a threat which the FAT does not imply.     

Target loans, current account balances and capital flows: the ECB’s rescue facility

This paper presents the first comprehensive Target database of the Eurozone and interprets it from an economic perspective. We show that the Target accounts measure the intra-Eurozone balances of payments and indirectly also international credit given through the Eurosystem in terms of reallocating the ECB’s net refinancing credit. We argue that the Euro crisis is a balance-of-payments crisis similar to the Bretton Woods crisis, and document to what extent the Target credit financed the current account deficits and outright capital flight in Greece, Ireland, Portugal, Spain and Italy. To prevent the ECB from undermining the allocative role of the capital market, we propose adopting the US system of credit redemption between the District Feds.     

Germany's Economic Unification: An Assessment after Ten Years

A political miracle occurred when Germany was reunited, and at first glance an economic miracle has followed. Real incomes in the eastern area have now reached the western level, and investment per capita has been much higher than in the west. However, every third deutschmark spent in the east has been coming from the west, investment in equipment has fallen below the west German per capita level, and convergence seems to have come to a halt at an overall labor productivity of only 59% of west Germany. Excessively high wages coupled with investment incentives that made the cost of capital negative rank high among the possible explanations. This paper describes reforms of the labor market that could help to make convergence continue.     

Eurowinners and Eurolosers: The distribution of seigniorage wealth in EMU

The European Monetary Union (EMU) will involve socialization of the existing seigniorage wealth of the national central banks. This socialization will create windfall gains for countries with relatively low monetary bases such as France and the UK and it will be disadvantageous for countries like Germany, Austria, Spain or the Netherlands which will suffer per capita wealth losses of between 406 and 182 ecus. The paper quantifies the gains and losses in seigniorage wealth under alternative membership and bank regulation scenarios.