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71.
In this paper, we develop a continuous time factor model of commodity prices that allows for higher-order autoregressive and moving average components. We document the need for these components by analyzing the convenience yield’s time series dynamics. The model we propose is analytically tractable and allows us to derive closed-form pricing formulas for futures and options. Empirically, we estimate a parsimonious version of the general model for the crude oil futures market and demonstrate the model’s superior performance in pricing nearby futures contracts in- and out-of-sample. Most notably, the model substantially improves the pricing of long-horizon contracts with information from the short end of the futures curve. 相似文献
72.
Simone J. van Zolingen Jan N. Streumer Rolinda De Jong Marcel R. van der Klink 《International Journal of Training and Development》2000,4(3):208-216
Post Offices Inc. in The Netherlands has developed and implemented a new instruction model for the training of desk employees. The quality of the new instruction model was assessed by means of the evaluation model of Jacobs and Jones for on‐the‐job training. It is concluded that the implementation of the training model has not been completely successful. Critical success factors, such as the performance of the mentors as well as the quality of the self‐study material, have to be improved. Mentors are expected to serve as a behavioural model, to provide feedback, arrange an adequate environment for self‐study, motivate trainees for self‐study and evaluate trainees’ progress on a regular basis. This study shows that mentors must be fully convinced of the benefit of a new instructional model, if not, the implementation will not be successful. Besides, the study shows that the quality of the self‐study material depends very much on the similarity between the knowledge needed in work and the knowledge presented in the self‐study material. 相似文献
73.
Stochastic Generational Accounting Applied to Reforms of Dutch Occupational Pensions 总被引:1,自引:0,他引:1
This paper examines stochastic or ‘value based’ generational accounting as a method to assess the intergenerational redistributive impact of pension reform. The analysis is applied to three policy changes to the regulation of Dutch occupational pensions during the years 2012 and 2013 that mark the transition from defined benefit pensions to ‘defined ambition’ pension schemes. 相似文献
74.
The problems that social and labour market institutions are facing today are often attributed to globalisation and ageing.
This article argues that globalisation merely exposes inherent weaknesses in social institutions while ageing aggravates them,
but that neither of the two phenomena is the fundamental cause of the challenges. Moreover, there is no inherent trade-off
between social and economic policies, but to reconcile the policies comprehensive modernisation is needed. Each country can
face the challenges should they wish to do so and converging to a single social model is neither needed nor wanted. Finally,
European (economic) and national (social) policies become increasingly intertwined and this calls for a new role for Europe.
* Bureau of European Policy Advisers, European Commission.
The authors would like to thank Tassos Belessiotis for his valuable comments. The authors would also like to thank their colleagues
Declan Costello, Georg Fischer, Agnes Hubert, Frédéric Lerais, Mattias Levin, Roger Liddle and Jér?me Vignon. In addition
valuable comments by Lans Bovenberg, Gosta Esping-Andersen, Ruud de Mooij, Frederick van der Ploeg and Fritz Scharpf were
appreciated. The views expressed in this article are the views of the authors and do not bind the European Commission. 相似文献
75.
Marcel Riesz 《Scandinavian actuarial journal》2013,2013(1):54-74
Abstract On connaît le rôle que joue le théorème de Parseval. dans la théorie des séries de Fourier et, plus généralement, dans celle des développements suivant des fonctions orthogonales. On sait aussi qu'on peut généraliser la notion d'orthogonalité ainsi que le théorème de Parseval de différentes manierès, p. ex. en se servant de l'intégrale de Stieltjes correspondant à, une distribution de masses positives. 相似文献
76.
We develop a standard model to show how transaction costs in international investment affect conventional tests of consumption risk sharing, both in a multilateral and a bilateral setting. We implement the tests in a novel international data set on bilateral holdings of equity, bonds, foreign direct investment (FDI) and bank loans. In our data, high foreign capital holdings are associated with international consumption risk sharing as implied by our theory. This is especially true of investment in equity or bonds, but not of foreign direct investment or bank loans. In our model, the implication is that transaction costs are higher for FDI and international loans. The discrepancy could reflect technological differences, but also the prospect of expropriation, perhaps most stringent for FDI or loans. We argue that expropriation risk is endogenous to both the borrower's institutions and its openness to international markets. The detrimental impact of poor institutions is muted in open economies, where the possibility of subsequent exclusion from world markets deters expropriation of foreign capital. We show the implied effects of institutions prevail in both the cross-section of consumption risk sharing and in observed international investment patterns. 相似文献
77.
This article studies the portfolio problem with realization-based capital gain taxation when limited amounts of losses qualify for tax rebate payments, as is the case under current US tax law. When the tax rate applicable to realized losses exceeds that on realized capital gains, it can be optimal to realize capital gains immediately and pay capital gain taxes to regain the option to use potential future losses against a higher tax rate. This incentive adds an entirely new and as yet unstudied dimension to the portfolio problem. It causes risk averse investors to hold more equity and attain higher welfare levels than is the case when trading under a tax system that seeks to collect the same amount of taxes, but does not allow for tax rebate payments. This is because the benefit to these investors from having their losses subsidized is greater than the suffering from having profits taxed at a higher rate. 相似文献
78.
79.
We develop a model in which social pressure on a firm to behave well is jointly produced by a state regulator (EPA) and an NGO. The EPA and NGO differ in how they trade-off business versus environmental interests and also have access to different instruments in pursuit of their objectives. In particular, while the EPA will typically have the tools for detecting misbehaviour, the NGO can influence the intensity of social hostility directed towards those found to have misbehaved. EPA and NGO efforts may be strategic complements or substitutes, depending upon circumstances. We present a taxonomy of outcomes in the game between EPA and NGO in the spirit of Fudenberg and Tiroles’s (Am Econ Rev Pap Proc 74(2):361–366, 1984) classic taxonomy of business strategies. We also consider strategic delegation from NGO supporters to an NGO that has tastes over environmental and business interests different to their own. 相似文献
80.
We conduct a large scale experiment to investigate peer effects in computer assisted learning (CAL). Identification relies on three levels of randomization. We find an average 0.17 standard deviation improvement in math scores among primary school students. This average effect is the same for students treated individually or in pairs, implying that peer effects double the learning benefit from a given equipment. Among paired students, poor performers benefit more from CAL when paired with good performers and vice versa. Average performers benefit equally irrespective of who they are paired with. This suggests that the treatment is dominated by knowledge exchange between peers. We also find that CAL treatment reduces the dispersion in math scores and that the beneficial effects of CAL can be strengthened if weak students are systematically paired with strong students. 相似文献