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91.
92.
Gianluca Femminis 《The Scandinavian journal of economics》2001,103(1):63-77
While the "risk amelioration" literature suggests that risk-sharing channels savings into risky but productive technologies and hence favours growth, models focused on precautionary savings reverse this conclusion. We solve, by means of numerical techniques, a model based on human capital accumulation through education, and find that the increase in precautionary savings makes labour more productive in the goods sector and draws resources from education, which is the "growth leading" activity. Hence, we establish a result favourable to financial integration, even in a model where precautionary savings play an important role. 相似文献
93.
农村合作运动是国民政府为发展农业生产、复兴农村经济、改善农民生活而实施的有关社会经济建设的行动。农村合作运动中组建的各种合作社,在改良品种、改进耕作技术、推广农业知识等方面发挥了重要的作用,扮演了引进和扩散现代农业生产要素的角色,丰富了作物的品种,提高了农业生产的效率,增加了农民收入。 相似文献
94.
金属矿山酸性废水治理技术现状与展望 总被引:2,自引:0,他引:2
对金属矿山酸性废水的来源、危害和治理技术进行了分析,对普遍采用的中和沉淀法的各种处理工艺进行了重点比较、分析,同时简单介绍了生物处理法、人工湿地法、氧化还原法、萃取电积法等矿山酸性废水治理方法,并对金属矿山酸性废水源头控制技术进行了展望。 相似文献
95.
96.
《Socio》2021
We adopt a quasi-experimental approach to measure the causal effect, on first-year students in bachelor-level courses at the Department of Economics and Business Studies of the University of Genoa, Italy, of having been treated to a recently activated orientation program when they were high school seniors. Improvements are evaluated at the end of the first academic year in terms of grade point average (GPA), inactivity (failing to pass even a single exam) and number of successfully completed exams. Treatment effects on GPA are estimated both for the overall treatment group and for subsamples consisting of treated students with high and with low high school exit grades. After performing several sensitivity checks, a sizeable treatment effect is confirmed both in terms of inactivity and in terms of average GPA. No clear effect was found on the number of exams. Effects on GPA are considerably stronger on students with lower high school exit grades. 相似文献
97.
98.
Romeo Danielis Adriana Monte 《International Journal of Sustainable Transportation》2018,12(5):380-395
The contribution of this paper consists in applying several techniques to estimate a composite indicator of sustainable urban mobility for 116 Italian provincial towns, as proposed by Luzzati and Gucciardi (2015). The aim is to provide the decision-maker with a richer set of information on sustainable mobility, making explicit the impact of the techniques used on the values obtained. A set of 16 indicators with a nested structure has been selected and 33 combinations of normalization, weighting, and aggregation techniques are applied. The results are presented by city, by city groupings (size and location), and focusing on the ten largest Italian cities. It is found that small cities perform better in terms of sustainable mobility than medium or large cities. As expected, in some cases (e.g., Milan) the intervals of the results obtained are quite large, indicating that the techniques used to normalize, weight, and aggregate the indicators highly affect the performance indexes. In other cases (e.g., Rome) the results are stable across methodologies. 相似文献
99.
ABSTRACT In a participating endowment contract, the special loss compensation and profit sharing mechanism leads to heterogeneous benchmarks to distinguish the gain and loss for the policyholder's and the insurance company's S-shaped utilities. Because of the intense competition among the insurance companies and the requirement of the regulators, the benefits of the policyholders should be considered. As such, choosing the weighted utility of the two counterparts as the optimization objective is a rational setting. This setting induces a non-HARA (hyperbolic absolute risk aversion) and non-concave objective utility whose exact concavity and convexity are unknown. The difficulties not only come from this highly non-concave optimization problem, but also exist in the implicit integration of the optimum when solving the expected utilities of the two counterparts. We originally design an identification method to establish two categories of concave envelopes to solve the optimization problem, and propose an innovative numerical integration by substitution technique to deal with the implicit integration problem. The numerical simulation results recognize the existence of Pareto improvement of the two counterparts, which shows that the utilities of the policyholder and the insurance company can be simultaneously improved by switching into the weighted objective and appropriately amending the contract. 相似文献
100.
In a recent article, San Ling Lam (1990) used a probit estimation technique to re-examine the conclusions of Hufbauer, Schott and Elliott (1985) regarding the effectiveness of economic sanctions in achieving foreign policy goals. While Lam's criticisms of the HSE methodology are valid, the results of the model developed here differ in lending support to the HSE conclusions. In addition, the model can be used to predict the probability of sanctions contributing to a peaceful resolution of the recent Middle East crisis. The predicted probabilities of success in the Iraq case were above average and well above 50 percent. 相似文献