A note on the returns from minimum variance investing

Disappointed with the performance of market weighted benchmark portfolios yet skeptical about the merits of active portfolio management, investors in recent years turned to alternative index definitions. Minimum variance investing is one of these popular concepts. I show in this paper that the portfolio construction process behind minimum variance investing implicitly picks up risk-based pricing anomalies. In other words the minimum variance tends to hold low beta and low residual risk stocks. Long/short portfolios based on these characteristics have been associated in the empirical literature with risk adjusted outperformance. This paper shows that 83% of the variation of the minimum variance portfolio excess returns (relative to a capitalization weighted alternative) can be attributed to the FAMA/FRENCH factors as well as to the returns on two characteristic anomaly portfolios. All regression coefficients (factor exposures) are highly significant, stable over the estimation period and correspond remarkably well with our economic intuition. The paper also shows that a direct combination of market weighted benchmark portfolio and risk based characteristic portfolios will provide a statistically significant improvement over the indirect pickup via the minimum variance portfolio.     

Policy instruments for sustainability‐oriented organizational learning

The concept of sustainable development implies the need for organizational learning in business corporations to find innovative solutions. In this context, the paper analyzes the requirements and options for environmental policy to induce sustainability‐related learning processes in corporations. It discusses the impacts of different policy instruments on these processes. Initially, the particular challenges of organizational learning for sustainability are being sketched out. Drawing on organizational learning studies, a subsequent section of the paper addresses fundamental elements and drivers for organizational learning processes on different levels in business corporations. The particular nodes where public policy can influence corporate learning processes are the central focus of these considerations. On this basis, we examine existing policy instruments frequently used in environmental policy with regard to their potential to foster learning processes towards sustainability. Copyright © 2005 John Wiley & Sons, Ltd and ERP Environment.     

The impact of news,oil prices,and global market developments on Russian financial markets1

This paper analyses the impact of news, oil prices, and international financial market developments on daily returns on Russian bond and stock markets. First, regarding returns, energy news affects returns, while news from the war in Chechnya is not significant. Market volatility does not appear to be sensitive to either type of news. Second, a significant effect of the growth in oil prices on Russian stock returns is detected. Third, the international influence on Russian financial markets depends upon the degree of financial liberalization. The higher the degree of financial liberalization, the stronger is the impact of US stock returns on Russian financial markets. In addition, banking reform and interest rate liberalization efforts seem to dictate the globalization of Russian stock markets, while it is the progress in liberalizing securities markets and non‐bank financial institutions that matters more for the globalization of Russian bond markets.     

Optimal Capital Income Taxes and Capital Controls in Small Open Economies

This paper studies the optimal taxation of capital income in a simplemodel of a small open economy where domestic residents can evade taxeson their foreign investment income. The national government can onlytax domestic capital income and can impose capital controls, whichhowever absorb real resources. The design of optimal policy in thismodel depends on the revenue needs of the government. For relativelylow levels of government expenditures, it turns out that the countrydoes not levy capital income taxes but may restrict capital exports.Otherwise, the country taxes domestic capital income and sets capitalcontrols such that capital exports are driven to zero, at an optimum.In contrast to other models with capital controls it turns out thatthis policy can lead to underinvestment in domestic capital.JEL Classification Number: E 62, F 41, H 21     

Reconsidering central bank independence

In this paper, we survey the case for central bank independence (CBI). We conclude that CBI is neither necessary nor sufficient for monetary stability. CBI is just one potentially useful monetary policy design instrument among several, and CBI should not be treated as an exogenous variable. Instead, the question that should be addressed is why societies decide to make their central banks independent? The reasons why CBI is chosen are related to legal, political, and economic systems. A number of empirical studies find correlations between CBI and low inflation rates. Endogeneity of CBI suggests, however, that the correlation has no implications for causality.