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排序方式: 共有108条查询结果,搜索用时 11 毫秒
11.
We study the dynamic investment strategies in continuous-time settings based upon stochastic differential utilities of Duffie and Epstein (Econometrica 60:353–394, 1992). We assume that the asset prices follow interacting Itô-Poisson processes, which are known to be the so-called reaction–diffusion systems. Stochastic maximum principle for stochastic control problems described by some backward-stochastic differential equations that are driven by Poisson jump processes allows us to derive the optimal investment strategies as well as optimal consumption. We shall furthermore propose a numerical procedure for solving the associated nested quasi-linear partial differential equations. 相似文献
12.
It is well known that many of the manufacturing practices advanced in Japan in the 1970s and 1980s emphasize bottom-up decision processes characterized by teams, the empowerment of multi-skilled workers on the shopfloor, demand-pull and horizontal decision mechanisms. These practices include Just-in-Time (JIT) and quality management practices such as quality circles (QC) and total quality management (TQM). While these practices continue to be effective under appropriate circumstances, the drastic appreciation of the Japanese yen that has taken place since the mid-1980s and the prolonged recession following the burst of the bubble have forced many Japanese manufacturers to adopt new methods to improve their production efficiency. In this paper we discuss one of such methods called Total Productivity Management (TPM). Unlike JIT or TQM, implementing TPM requires a top-down approach. TPM provides direct connections between corporate-wide objectives such as the overall cost reduction and shopfloor practices. It is possible that TPM has contributed significantly to Japanese manufacturers' recent success in reducing their cost of operation. © 1997 John Wiley & Sons, Ltd. 相似文献
13.
We provide a theoretical and numerical framework to study optimal insurance design under asymmetric information. We consider a continuous-time model where neither the efforts nor the outcome of an insured firm are observable to an insurer. The insured may then cause two interconnected information problems: moral hazard and fraudulent claims. We show that, when costly monitoring is available, an optimal insurance contract distinguishes the one problem from the other. Furthermore, if the insured’s downward-risk aversion is weak and if the participation constraint is not too tight, then a higher level of the monitoring technology can mitigate both problems. 相似文献
14.
Hitoshi Imai Naoyuki Ishimura Ikumi Mottate Masaaki Nakamura 《Asia-Pacific Financial Markets》2006,13(4):315-326
The Hoggard–Whalley–Wilmott equation is introduced to model portfolios of European type options incorporating transaction
costs. The model gives rise to a nonlinear parabolic partial differential equation (PDE), whose nonlinearity reflects the
presence of transaction costs. We show analytically the existence of solutions which are not necessarily convex nor concave.
Numerical treatments are also given, which are devised to effectively handle an infinite domain and unbounded solutions.
相似文献
15.
16.
This paper examines the extent of the inadequacy of standard cross-sectional models of US labor force behavior and considers the abilities of alternative models to capture the observed continuity in the hours of work and earnings of individuals as well as in their employment histories. Both of the alternatives to the standard cross-sectional model considered in this study incorporate limited amounts of information about past work behavior that could easily be collected as part of a national population census. Using a population of 21 to 64 year old married working women taken from a 1969 through 1978 Michigan Panel Study of Income Dynamics, the variables included in the Z vector age: 1) age of the wife; 2) education of the wife; 3) state average hourly wage in manufacturing measured in 1967 dollars; and 4) unemployment rate for the state in which the wife lives. Results show that by using information about a women's hours of work and wage rate in the previous year, it may be feasible to improve on forecasts of a woman's employment and earnings behavior. For each model a separate estimate is made for wives aged 21 through 46, and for those aged 47 through 64. The dummy and difference models perform much better than the standard model, with the dummy model having the higher pseudo-chi-square statistic. These models show that systematic errors made in determining which individuals work, what they earn per hour, or how many hours they work, should result in prediction errors of the same sort year after year in the computation of annual earnings. These findings with respect to years of work and nonwork, years of part time versus full time work, and cumulative earnings over a 10 year period, confirm and extend Heckman's findings; thus, forecasting models of the work behavior of individuals should not be estimated using pure cross-sectional data. It would be important if researchers could identify what observable factors, if any, increase the likelihood that wives will alter their work behavior from what it has been in the immediate past, even if they are not able to fully understand or explain this previous work behavior. 相似文献
17.
Hisashi Nakamura 《Asia-Pacific Financial Markets》2012,19(2):119-147
This paper studies the role of restructuring, as compared to the one of liquidation, in valuation of long-term debt contracts in a continuous-time model with costly information disclosure. In asset-pricing literature, Merton??s (J Finance 29:449?C470, 1974) contingent-claim models have been long used for valuation of corporate securities and loans. However, since they basically assume sufficiently complete security structures in markets, the literature is not necessarily suitable for examining costly-information problems. On the other hand, in corporate-finance literature, it has been well known that agency costs (i.e., conflicts of interest among agents) distort corporate capital structure under costly-information problems. However, the effect of the distortion on valuation of securities and loans has not been explicitly studied either in theory or in practice. This paper bridges such a gap between the two literatures. This paper shows that, under a costly-information problem, corporate leverage ratios are higher when restructuring is expected to be accepted in default than otherwise. The risk of a jump to liquidation increases the default probability in short term, and decreases the probability of restructuring over time. 相似文献
18.
The value of the open innovation approach is now widely recognized, and the practice has been extensively researched, but still very little is known about the relative impact of firm‐level and laboratory‐level open innovation policies and practices on R&D performance. This study attempts to measure that impact by analyzing a sample of 203 laboratories of Japanese firms located in Japan. It examines simultaneously the effects of firm‐level open innovation policy and laboratory‐level external collaborations on laboratory R&D performance. The study aims to go beyond a general understanding of the importance of open innovation; it shows how an open innovation policy can have a positive and significant effect on collaborations between a laboratory and local universities or business organizations. The results also show how an open innovation policy can contribute to the laboratory's R&D performance by facilitating external collaborations by the laboratories. It demonstrates how these factors affect R&D performance in different ways, depending on the type of R&D tasks. Our findings suggest several theoretical and practical implications in the field of R&D management. 相似文献
19.
Based on the potential approach to interest rate modelling, we introduce a simple tractable model for the unified valuation of interest rate, currency and equity derivatives. Our model is able to accommodate the initial term structure of zero‐coupon bond prices, generate positive and bounded interest rates, and handle cross products such as differential swaps, quanto options and equity swaps. As our model is specified under the actual probability measure, it can be directly used for portfolio risk management and the computation of value at risk. Furthermore, our model yields simple analytical formulas that are easy to calibrate and implement. 相似文献
20.
Choosing Price or Quantity? The Role of Delegation and Network Externalities in a Mixed Duopoly
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Yasuhiko Nakamura 《Australian economic papers》2017,56(2):174-200
This paper considers a differentiated goods managerial mixed duopoly composed of one social welfare‐maximising public firm and one profit‐maximising private firm. We model the firm choice of the strategic contract. We find that when the strength of network effects is sufficiently strong, the price competition can become the unique equilibrium market structure. Furthermore, we show that there exists an area of the degree of product differentiation and the strength of network effects such that the situation wherein the public firm chooses its price contract whereas the private firm chooses its quantity contract can become the unique equilibrium structure. 相似文献