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This study investigates the relative roles of bond ratings and financial information in the setting of bond yields. Structural equation modeling techniques are used to learn whether ratings determine yields or whether both ratings and yields are determined by a concurrent set of economic and financial factors. Tests of alternative structural model configurations provide evidence regarding the associations between bond ratings, financial information, and bond yields. Both ratings and financial information are found to play an important role in determining bond yields. In addition, yields are consistent with the higher rating in cases of split ratings. 相似文献
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This article presents two studies that examine whether leader supportive behaviors facilitate knowledge sharing and employee creative problem‐solving capacity, thereby enhancing creative performance. The findings from both studies indicate that leader supportive behaviors are directly and indirectly related, through both internal and external knowledge sharing, to employee creative problem‐solving capacity. In addition, creative problem solving was related to the two dimensions of creative performance—fluency and originality. However, a test of the mediation model indicated that creative problem solving only mediated the relationship between internal knowledge sharing creative performance and originality. These findings highlight the complex process by which leaders facilitate both internal and external knowledge sharing and employee creative problem‐solving capacity, thereby improving employee creative performance. 相似文献
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Thomas Reiter und Heiko Hofmann 《Controlling & Management》2008,52(5):286
Ohne Zusammenfassung 相似文献
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A transversal generated by a system of distinct representatives (SDR) for a collection of sets consists of an element from
each set (its representative) such that the representative uniquely identifies the set it belongs to. Theorem 1 gives a necessary
and sufficient condition that an arbitrary collection, finite or infinite, of sets, finite or infinite, have an SDR. The proof
is direct, short. A Corollary to Theorem 1 shows explicitly the application to matching problems. In the context of designing
decentralized economic mechanisms, it turned out to be important to know when one can construct an SDR for a collection of
sets that cover the parameter space characterizing a finite number of economic agents. The condition of Theorem 1 is readily
verifiable in that economic context. Theorems 2–5 give different characterizations of situations in which the collection of
sets is a partition. This is of interest because partitions have special properties of informational efficiency. 相似文献
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The lumpy nature of plant-level investment is generally not taken into account in the context of New Keynesian monetary theory (see, e.g., 8 and 32). Our main result shows that if this theory is augmented by a standard model of lumpy investment, monetary policy shocks lead to large but very short-lived impacts on output and inflation, in a way that goes against empirical evidence and the consensus view in the literature. 相似文献
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Michael Reiter 《Bulletin of economic research》1998,50(4):309-321
The paper investigates the effects of aggregation on different macroeconomic modelling strategies. This is done within the framework of a small example economy, where all households solve the same intertemporal consumption problem, but with different parameters of the utility functions and different exogenous income processes. Three models are fitted to the aggregate data: a representative agent rational expectations model, a simple version of the permanent income hypothesis, and a time series model. If the economic environment is kept stable, the three approaches perform similarly well. However, the representative agent model stands up to the Lucas critique better than its competitors, despite the aggregation error. Unlike the other models, it never gives completely wrong forecasts even after an exogenous change in income processes. 相似文献