Rank tests for the 2×2 split plot design

Summary In the 2×2 split plot design there are given rank tests for the classical hypotheses of the main effects and interaction.The asymptotic normality of the proposed teststatistics is proved and their consistency is investigated. For testing the main effects these methods cannot be extended on the generala×b split plot design Counter-examples are given.     

Time deposits in the Brunner-Meltzer model of asset markets

Benjamin Friedman raised on a previous occasion questions about the interpretation of the multiplier formulation in our assetmarket model of the money suppl process. These questions addressed the role of time deposits in this process. This short note establishes the consistency of an equilibrium model of assetmarket interaction centered on a multiplier formulation. It states the rationale of the procedure and the nature of time deposit supply function the process.     

Measuring the severity of unemployment

A social-welfare (illfare) function framework is applied to compare two demographic groups as to the severity of their unemployment experience. This is based on the assumption that for each individual the disutility of unemployment is an increasing and convex function of spell length. The very concept of spell length and its distribution, however, is not unambiguous. In contrast to previous literature which focuses exclusively on the interrupted spell length in a stock of unemployed, we stress the usefulness of the concept of complete spell length in a cohort of unemployed. We establish an equivalence relationship between second-degree dominance in the cohort and first-degree dominance in the stock. For specific illfare functions the disutilityU(x) when applied to the cohort and the disutilityU(x) when applied to the stock will produce the same value of aggregate welfare (illfare).     

Einzelbesprechungen

Ohne Zusammenfassung     

RANK TESTS IN 2X2 DESIGNS

Abstract. In literature numerous attempts can be found for the evaluation of two factor designs with fixed effects by means of rank tests. The aim of the present article is to show the limits of these methods and to give some new procedures for 2X2 designs. First, functionals of distribution functions shall be defined whose relations to the usual parameters of the linear model are analysed. These functionals are free of nuissance parameters under the respective hypothesis; they are estimated by special ranks of the data. The asymptotic distribution of these statistics is derived by a generalization of the Chemoff–Savage theorem for correlated random variables. The asymptotic variance depends on the parent distribution function but it can be estimated by using special rank methods. Thus, one obtains asymptotically distribution–free tests for two–factor designs with fixed effects. Some counter examples show why it is not possible to construct suitable rank tests for greater designs than the 2X2 design. The paper closes with a discussion of the drawbacks of the well known rank transform.     

Price Sensitivity of Hourly Day-ahead and Quarter-hourly Intraday Auctions in Germany

The introduction of the quarter-hourly intraday auction in 2014 for the German market confirms a tendency towards short-term energy markets. The reason for the new market was the need to trade shorter periods than just hours a day-ahead to minimize open positions in the more volatile continuous intraday trading. The increased production capacity of solar power boosted this requirement for new short-term power products. The quarter-hourly market shows a distinctive zigzag price formation. We identify two influencing factors: first, the solar residual that combines the trading of solar power ramps around midday as well as the gradients of consumption and thermal power plant ramps throughout the course of the day, and second, a characteristic two stage market design with higher liquidity for the hourly than for the quarter-hourly auction. Therefore, demand, solar generation and inflexible ramps of thermal power plants are hedged at the hourly day-ahead auction and use the quarter-hourly auction only to balance the remaining differences. To prove this argument the price sensitivities of the hourly day-ahead and quarter-hourly intraday auctions in Germany are compared based on actual bid and ask curves from 2015 and 2016. Finally, the development of an adequate design of future spot markets is discussed.     

FDI Effects on National Competitiveness: A Cluster Approach

Despite the close relationship between the activities of multinational enterprises (MNEs) and the competitiveness of host countries, few studies have linked these two subjects from a global perspective. Combining Porter’s approach and the work accomplished by international business economists provides a powerful analytical tool with which to review the recent empirical and theoretical literature on the effects of foreign direct investment (FDI) on national competitiveness. The contention is that FDI can indeed be a source of competitiveness but that previous studies have neglected the role of location, in particular the role of clustering on the absorptive capacity of the host State. The aim of this paper is to provide a comprehensive conceptual framework for assessing the effects of FDI on competitiveness to guide policy-makers as well as further research. This study is part of the research project entitled, “Multilateral Rules on Trade and Investment,” supported by the NCCR project “International Trade Regulation: From Fragmentation to Coherence,” World Trade Institute (WTI), Berne.