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501.
Mario Salerno Author Vitae Paolo Landoni Author VitaeAuthor Vitae 《Technological Forecasting and Social Change》2008,75(8):1202-1223
Nanoscience and Nanotechnology (NST) is widely considered as one of the most promising areas of scientific and technological development for future decades. As a consequence, almost every country in the world has chosen to invest significantly in this area. This choice, however, is only a first step in the investment decision process, given that almost any scientific discipline can be taken at the scale of a nanometre. In this paper, it is argued that foresight studies to decide where to invest in the nanotechnology area should be designed in a different way from what is normally done. Nanotechnology, in fact, has specific characteristics that should be taken into account when evaluating its expected impacts and potentialities. 相似文献
502.
Mario Amendola 《Economics of Innovation and New Technology》2013,22(7):631-653
This paper presents an out-of-equilibrium model to explain differences in the capacity to absorb new skill-biased technologies. The usual mainstream viewpoint focusing only on the role of labour markets will be re-examined in a context characterized by a sequential structure of both the processes of production and the skill formation, whose interaction brings about coordination failures harming the viability of the innovation process. Our out-of-equilibrium approach allows us to consider the more general interplay between stylized labour and product market characteristics, on the one hand, and educational policies, on the other hand. The robust results of the simulations show that educational policies appear to be important in restoring the required coordination both in rigid and in flexible systems, but for different reasons. In the former case, educational policies financed by taxation allow the system to escape a low-productivity final equilibrium. In the latter case, they contrast the financial constraint associated with a large decrease in the unskilled wage. Altogether, a moderate degree of rigidity seems to be the most appropriate institutional environment to reach the targets of viability and of a full exploitation of the technological potential. 相似文献
503.
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505.
Mario Menegatti 《Economic Theory》2009,39(3):473-476
Courbage and Rey (Econ Theory 32:417–424 2007) analyse precautionary saving in the presence of a background risk under specific
sets of assumptions on the form of income risk and background risk. Three cases are examined: the case of independent risks,
the case of Bernoulli-distributed random variables and the case of risk first-degree stochastic. For each of these cases Courbage
and Rey compute the specific sets of conditions related to precautionary saving. This comment shows that some of their conclusions
are partially incorrect.
相似文献
506.
This study aims to propose and validate a visitors’ evaluation index (VEI) that captures service evaluation in the context of a visit to an archaeological site. Drawing on the literature on the concepts of ‘service quality’, ‘service experience’, ‘service convenience’, and ‘visitor's satisfaction’, the study develops a measurement index that includes the specific components of service evaluation associated with a visit to an archaeological complex. To validate the proposed VEI, the paper describes an empirical study of 1021 visitors to the Roman archaeological site of Italica, located in Santiponce (Spain). Following structural equation modelling (SEM), the results validate the proposed structure of four theoretical components in the VEI: (i) ‘service experience’; (ii) ‘service quality’; (iii) ‘access sacrifices’; and (iv) ‘effort sacrifices’. Of these, ‘service experience’ is found to be the major contributor to the robust VEI proposed and validated in the study. 相似文献
507.
Richard A. Gallenstein Khushbu Mishra Abdoul G. Sam Mario J. Miranda 《Journal of Agricultural Economics》2019,70(3):640-662
Index insurance has been heralded as a potential solution to risk management problems faced by smallholder farmers in developing countries. Despite its potential, demand for standalone index insurance contracts has remained low in early field trials. We investigate the willingness to pay for drought index insurance‐backed loans in northern Ghana using contingent valuation. We find that index insurance lowers overall demand for agricultural loans. We also compare micro‐level index insurance, provided directly to farmers, with meso‐level insurance, provided to the credit agency and find that farmers appear to prefer micro‐level insurance. Finally, farmers are willing to pay to avoid basis risk. 相似文献
508.
We present the first EU‐wide study on the prevalence and labour market impact of occupational regulation in the European Union. Drawing on a new EU Survey of Regulated Occupations, we find that licensing affects about 22 per cent of workers in the European Union, although there is significant variability across member states and occupations. On average, licensing is associated with a 4 per cent higher hourly wage. Using decomposition techniques we show that rent capture accounts for one‐third of this effect and the remainder is attributed to signalling. We find considerable heterogeneity in the wage gains by occupation and level of educational attainment. Finally, occupational licensing increases wage inequality. After accounting for composition effects, licensing increases the standard deviation of wages by about 0.02 log points. 相似文献
509.
A structural factor model for 112 US monthly macroeconomic series is used to study the effects of monetary policy. Monetary policy shocks are identified using a standard recursive scheme, in which the impact effects on both industrial production and prices are zero. The main findings are the following. First, the maximal effect on bilateral real exchange rates is observed on impact, so that the “delayed overshooting” puzzle disappears. Second, after a contractionary shock prices fall at all horizons, so that the price puzzle is not there. Finally, monetary policy has a sizable effect on both real and nominal variables. 相似文献
510.