We analyze how the market processes a signaling event by studying a sample of self-tender offers, events often viewed as signals
of firm value. By examining changes in the degree of informed trading, we find asymmetric information costs fall at announcement,
remain low throughout the event, and increase at offer expiration. By one month following expiration, informed trading returns
to a level not significantly different from that prior to the offer. Higher risk firms have significantly larger declines
in information asymmetry during the offer. Increases in information asymmetry persist one month following expiration for firms
with lower pre-offer informed trading. (JEL G14, G32) 相似文献
Using a small empirical model of inflation, output, and money estimated on U.S. data, we compare the relative performance of monetary targeting and inflation targeting. The results show monetary targeting to be quite inefficient, yielding both higher inflation and output variability. This is true even with a nonstochastic money demand formulation. Our results are also robust to using a P∗ model of inflation. Therefore, in these popular frameworks, there is no support for the prominent role given to money growth in the Eurosystem's monetary policy strategy. 相似文献
Background: Validation of overall survival (OS) extrapolations of immune-checkpoint inhibitors (ICIs) during the National Institute for Health and Care Excellence (NICE) Single Technology Assessment (STA) process is limited due to data still maturing at the time of submission. Inaccurate extrapolation may lead to inappropriate decision-making. The availability of more mature trial data facilitates a retrospective analysis of the plausibility and validity of initial extrapolations. This study compares these extrapolations to subsequently available longer-term data.
Methods: A systematic search of completed NICE appraisals of ICIs from March 2000 to December 2017 was performed. A targeted search was also undertaken to procure published OS data from the pivotal clinical trials for each identified STA made available post-submission to NICE. Initial Kaplan-Meier curves and associated extrapolations from NICE documentation were extracted to compare the accuracy of OS projections versus the most mature data.
Results: The review identified 11 STAs, of which 10 provided OS data upon submission to NICE. The extrapolations undertaken considered parametric or piecewise survival models. Additional data cut-offs provided a mean of 18 months of OS beyond the end of the original data. Initial extrapolations typically under-estimated OS from the most mature data cut-off by 0.4–2.7%, depending on the choice of assessment method and use of the manufacturer- or ERG-preferred extrapolation.
Conclusion: Long-term extrapolation of OS is required for NICE STAs based on initial immature OS data. The results of this study demonstrate that the initial OS extrapolations employed by manufacturers and ERGs generally predicted OS reasonably well when compared to more mature data (when available), although on average they appeared to underestimate OS. This review and validation shows that, while the choice of OS extrapolation is uncertain, the methods adopted are generally aligned with later-published follow-up data and appear appropriate for informing HTA decisions. 相似文献
In many preferential trade agreements (PTAs), countries exchange not only reductions in trade barriers but also cooperation in non-trade issues such as labour and environmental standards, intellectual property, etc. We provide a model of PTAs motivated by cooperation in non-trade issues and analyse its implications for global free trade and welfare. We find that such PTAs increase the cost of multilateral tariff reductions and thus cause a stumbling block to global free trade. This occurs because multilateral tariff reductions decrease the threat that can be used in PTAs and thus the surplus that can be extracted from them. By explicitly modelling the interaction between preferential and multilateral negotiations, we derive a testable prediction and provide novel econometric evidence that supports the model's key prediction. The welfare analysis shows that the current World Trade Organization rules allowing this type of PTAs may be optimal for economically large countries, thus the model can predict the rules we observe. We also analyse alternative rules that constitute a Pareto improvement. 相似文献
There is perhaps no construct that is so fundamental to interpersonal interactions in organizations, yet so incompletely understood, than distance. Part of the difficulty in developing a comprehensive and informed understanding of the role distance plays in organizations is that theory and research in this area have been quite fragmented, focusing on narrow aspects of the construct and lacking the integration necessary to build a more general knowledge base. For example, Graen (1976) has contributed greatly to our understanding of one aspect of distance, presenting a model based on role theory whereby in-group and out-group members are hypothesized to enjoy different rewards, benefit from different leadership behaviors, and experience different levels of satisfaction and performance ratings based on relative closeness (or distance) in their working relationship with their supervisor. Other researchers have explored the phenomena of psychological distance (Rothaus, Morton, & Hanson 1965), spatial distance (Kerr & Jermier 1978; Ferris & Rowland 1985), and physical distance (Sundstrom, Burt, & Kamp 1980; Sundstrom 1986) in the supervisor-subordinate relationship. This research, although a good starting point, does not adequately define or integrate the various aspects of distance in organizations. This article represents an effort to develop a broader and more extensive understanding of the role distance plays in organizations by integrating the various types of distance into a theoretical model. A model of Dyadic Distance in the supervisor-subordinate relationship is presented which develops the new constructs of Dyadic, Psychological, Structural, and Functional Distance, examines their process dynamics and impact on Human Resource Management issues such as performance evaluations and turnover, and proposes needed directions for future research in this important area. 相似文献
A bstract In his 1915 essay "The Opportunity of Japan," Thorstein Veblen theorized that traditionai Japanese institutions would undergo evolutionary change as Japan exploited borrowed industrial technology and became integrated into the global business enterprise system. This article explains the recent liberalization of Japanese financial markets which followed Japan's rise to economic prominence within the context of Veblen's theory of institutional development of the enterprise system. The Japanese process of financial deregulation is reviewed, Veblen's predictions Japan are presented and an explanation provided for the liberalization of Japanese financial markets . 相似文献
Abstract . The economic performance and the political history of Botswana during 1974-84 contrasted significantly with the experience of virtually every other African country. The South African republic, immediately north of the Republic of South Africa, achieved steady real economic growth with improved social services and provision for its people's basic needs. This was achieved in spite of world recession and drought because its mineral wealth Was reserved for the people and mining companies had to pay for the privilege of extracting that wealth through a tax program limited to appropriating its surplus, while assuring the investors and entrepreneurs an adequate long-term return on capital and enterprise. But sound macroeconomic policies failed to provide even reasonably equitable benefits for the majority of the people. Sound micropolicies are needed to widen access to employment and earned income and to asset accumulation.相似文献
The paper presents an empirical model of wage determination in the public sector that leads to the specification of a system of interrelated wage equations for municipal employees, which allows for occupational and geographic interdependence of wages. The model also considers the influence of public employee unions, municipal government form, and monopsony power of local governments on the wages of municipal employees. Several variants of the derived system of equations are estimated based upon 1967 cross-section data for 478 cities, and the policy implications of the results are discussed. 相似文献