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Gabriella Conti Sylvia Frühwirth-Schnatter James J. Heckman Rémi Piatek 《Journal of econometrics》2014
This paper develops and applies a Bayesian approach to Exploratory Factor Analysis that improves on ad hoc classical approaches. Our framework relies on dedicated factor models and simultaneously determines the number of factors, the allocation of each measurement to a unique factor, and the corresponding factor loadings. Classical identification criteria are applied and integrated into our Bayesian procedure to generate models that are stable and clearly interpretable. A Monte Carlo study confirms the validity of the approach. The method is used to produce interpretable low dimensional aggregates from a high dimensional set of psychological measurements. 相似文献
43.
Richard L. Meier 《Futures》1997,29(4-5)
China's rapid urbanization makes its cities vulnerable to prolonged drought in the interior. Food needs of the cities will sometimes exceed China's carryover stocks. Moreover, its cities are likely to become so large that even the global reserves, as presently accumulated, are inadequate. A survey of the technological possibilities considers food supplies for a world population leveling somewhere between 10–15 billions, with China making up 9–18% of the total. Today's bioscience promises a number of nutritional substitutes two or three generations hence. Once the world overcomes population growth, successors to the strategies proposed in this article should make it possible to sustain Chinese cities at an increasingly high quality of life. 相似文献
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A new study reveals that U.S. companies face a troubling brain drain: Fifty-two percent of female scientists, engineers, and technologists abandon their chosen professions. If companies understand why women drop out, however, they can create targeted interventions and head off a talent shortage. 相似文献
45.
Sylvia Shao 《当代经理人(中旬刊)》2008,(6):100-102
管理者必须克服坏的行为,不能抱怨、哭诉,或者责怪其他人。把员工带出短期的失败阶段需要强大的领导力。否则,坏的行为会使短期的失败阶段更加糟糕。 相似文献
46.
Veronica Orellano Paulo Furquim Azevedo Maria Sylvia Saes Viviam Ester Nascimento 《Journal of Agricultural Economics》2015,66(3):660-671
This paper investigates empirically the effect of land invasions on farm production decisions. The main hypothesis is that more invasions in a region are associated with lower investment, and in particular a bias towards annual crops as opposed to long‐term crops. We use a county‐level dataset for the state of Paraná, Brazil, from 2003 to 2007, with 1,995 observations. The panel data structure allows us to control for fixed effects, such as the formalisation of land titles and land concentration, which might be correlated with the intensity of invasions. An instrumental variable fixed effects model was estimated to avoid other sources of bias. Our main finding is that land invasions are associated with lower long‐term crop production and a higher percentage of annual crops, which could accelerate land degradation, and undermine environmental sustainability. 相似文献
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Emmanuel Raynaud Paula Sarita Bigio Schnaider Maria Sylvia Macchione Saes 《Journal of economic surveys》2019,33(4):1151-1172
Why do firms concomitantly rely on more than one organizational arrangement to procure/distribute a given input/product? In this paper, we systematically review and discuss the extensive path undergone by the literature exploring this issue: the so‐called plural forms. We address two main questions: how to explain the coexistence (and often the prevalence) of plural forms in many types of businesses? Are plural forms stable or a transitory phenomenon? We describe the most prominent motivations identified in the economics and management literature that drive firms to adopt plural forms and show that their vast majority are related to the mitigation of various types of agency/transaction costs. We also demonstrate that most of the available pieces of empirical evidence suggest the stability of plural forms over time. We conclude by demonstrating the path that has been trailed by the most recent developments. 相似文献
50.
This research aims to examine the daily return generating processes for country-specific funds in five east-Asian countries for the period 1995-2000. The effects of component returns and their volatility on the dollar denominated returns and volatility of U.S., international investors and the effects of exchange rate regimes on risk and return are also evaluated. The GARCH-M model is adopted, without the restrictive assumptions of linearity, independence, and constant conditional variance. The time frame, 1995-2000 captures a 30 months period prior to these East Asian countries aborting exchange rate stabilization/intermediate exchange rate regimes in response to the currency crisis. The decomposition of returns to holders of country-specific equity funds into the component returns due to changes in the exchange rate and the returns valued in the fund's foreign currency during a period of crisis provides additional information. This research provides evidence of the importance of examining component returns. With regards to the effects on volatility, both the conditional variances associated with the exchange rate returns and the returns denominated in the foreign currencies show some importance, especially the conditional variances associated with the returns denominated in the foreign currencies. With regards to the effects of return component, the exchange rate returns have a greater effect on the fund returns than foreign currency dominated returns. 相似文献