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排序方式: 共有299条查询结果,搜索用时 15 毫秒
81.
This paper describes a way to model a seasonally and irregularly peaking price dynamics, as that originated in commodity and
energy markets, using a system of coupled nonlinear stochastic differential equations. The specific case of an electric power
market is used to show which microeconomic features this approach is able to model. Critical point analysis is used in a simple
way to show how the interaction between dynamic criticality and stochasticity can be used to develop further models, useful
to explore more deeply other types of peaking price dynamics. 相似文献
82.
In this paper, we examine econometrically the "fiscal dominance" model of the Monetary History of Italy proposed by Spinelli and Fratianni (1996). We test the proposition that monetary policy is endogenous to fiscal policy, and that such an endogeneity creates a specificity in the process generating Italian inflation. We perform our econometric tests by estimating a small structural linear econometric model, addressing carefully the issues of data-congruency of the specification, non-stationarity, cointegration, and credibility of the over-identifying restrictions. Our econometric investigation is based on a sample of annual observations from 1875–1994 and exploits the structural break which occurred in 1975, when Baffi became Governor of the Bank of Italy and the lack of independence of the central bank was first perceived as a problem. Baffi started the slow evolution process leading to the independence of the central bank, which was institutionally ratified by his successor Ciampi, when, in 1981, the Bank of Italy interrupted his commitment to buy all the government bonds left unsold in the public tenders (the "divorce"). Our empirical analysis over the sample 1875–1975 confirms the existence of a link between government deficit and money growth, and of a long-run relationship between the quantity of money and the price level; the evidence also stresses the relevance of supply side factors in the determination of inflation. When the model estimated for the sample 1875–1975 is applied to the period 1975–1994, a clear structural break in the relation between government deficits and money growth emerges. (J.E.L.: E5, E6). 相似文献
83.
Carlo Russo 《Review of Industrial Organization》2012,40(4):339-354
Choosing the wrong theoretical model to describe an industry??s behavior may lead to biased estimates of the degree of market power. This paper presents a two-step, data-driven methodology to reduce the risk of mis-specification bias. In the first step, a sliced inverse regression identifies the significant factors that affect the industry??s pricing behavior. In the second step, a non-parametric regression of price on the SIR factors estimates the link functions. The output of the algorithm offers useful information to identify the model that best approximates the industry??s pricing behavior. In addition, the output of the algorithm is used to develop a post-estimation test for model specification. 相似文献
84.
Carlo Zappia 《European Journal of the History of Economic Thought》2013,20(1):107-131
Hayek's critical attitude towards Walrasian modelling was based on informational considerations. In his view, a meaningful notion of equilbrium has to deal with the consistency of agents' plans which information is dispersed throughout the economy. He emphasized that only in this context could the role of market prices as aggregators of information be correctly analysed. Recent developments in general equilbrium theory with rational expectations have taken up the issue formally. In this paper, Haek's main ideas about the competiitive mechanism are compared with these recent results. It is argued that Hayek's notion of private information is different from that used in modern equilibrium theory, not only because of its dynamic content, as many critics observed ex post, as is usually in a general equilibrium framework. This issue of whether modern notions of private information, namel that used in conract theory, are good substitutes for Hayek' notion of personal knowledge is also examined in detail. From this analysis, it is possible to conclude that Hayek's notion of equilibrium neither entails Pareto optimality prperties nor full informational efficiency. 相似文献
85.
Global Value Chains Meet Innovation Systems: Are There Learning Opportunities for Developing Countries? 总被引:2,自引:0,他引:2
Carlo Pietrobelli 《World development》2011,39(7):1261-1269
86.
Carlo Rosa 《Journal of Banking & Finance》2011,35(2):478-489
This paper investigates the impact of US monetary policy on the level and volatility of exchange rates using an event study with intraday data for five currencies (the US dollar exchange rate versus the euro, the Canadian dollar, the British pound, the Swiss franc, and the Japanese yen). I construct two indicators of news about monetary policy stemming separately from policy decisions and from balance of risk statements. Estimation results show that both policy decisions and communication have economically large and highly significant effects on the exchange rates, with the surprise component of statements accounting for most of the explainable variation in exchange rate returns in response to monetary policy. This paper also shows that exchange rates tend to absorb FOMC monetary surprises within 30-40 min from the announcement release. 相似文献
87.
This paper explores the role that inflation forecasts play in the uncertainty surrounding the estimated effects of alternative monetary rules on unemployment dynamics in the euro area and the US. We use the inflation forecasts of 8 competing models in a standard Bayesian VAR to analyse the size and the timing of these effects, as well as to quantify the uncertainty relative to the different inflation models under two rules. The results suggest that model uncertainty can be a serious issue and strengthen the case for a policy strategy that takes into account several sources of information. We find that combining inflation forecasts from many models not only yields more accurate forecasts than those of any specific model, but also reduces the uncertainty associated with the real effects of policy decisions. These results are in line with the model-combination approach that central banks already follow when conceiving their strategy. 相似文献
88.
Carlo Gianelle 《Journal of Evolutionary Economics》2014,24(5):951-981
This paper uses network analysis to study how employment intermediaries have influenced inter-firm worker mobility in a region of Italy, in response to a 1997 reform that introduced temporary employment agencies. Worker reallocations from a matched employer-employee dataset are mapped onto a directed graph where the vertices are firms and the links denote transfers of workers between firms. Temporary employment agencies significantly improve network integration and practicability, while rapidly increasing the control over mobility channels. The trade off inherent in intermediation activity is captured and discussed. The potential of network analysis as a tool for monitoring regional labor markets is highlighted. 相似文献
89.
Firm size and the adoption of flexible automation 总被引:1,自引:0,他引:1
Data on the diffusion of flexible automation systems in the Italian metalworking industry are used to point out the role of size for the adoption of complex, systemic innovations. Plant and firm sizes turn out to be positively correlated to adoption rates. Moreover, adoption is more likely, ceteris paribus, in plants which are part of large industrial groups. This pattern applies in general, and is particularly remarkable for more advanced solutions. In this light, guidelines for industrial policies that focus on financial support, the diffusion of industrial standards, and the correction of asymmetries in the availability of know-how and skills are proposed.Financial support for this paper was provided by the Ministero della Pubblica Istruzione (MPI 40% research funds). Grants from the Fondazione Mauro and the CNR research project Tecnologie Meccaniche are also acknowledged. The research took advantage of the FLAUTO database, set up at the Laboratorio di Economia dei Processi di Automazione, MIP-Politecnico di Milano. 相似文献
90.
It is often claimed that, especially in mature industries, European firms can compete against low-cost NICs firms only if they are able to implement quality based strategies. The emphasis on the strategic role of quality, however, often leads to underestimate the extent of organizational and economic efforts, needed to turn quality from a potential opportunity into a real advantage. The lack of a thorough comprehension of the requirements of a quality based strategy can question the effectiveness of the investments some firms plan to improve their quality level. These firms can in fact remain stuck in the middle, if they do not have enough resources to turn quality into a source of sustainable competitive advantage.This paper is aimed at a better comprehension of both benefits and costs of a quality based strategy, with regard to a specific class of firms, Small Size Firms (SSFs), where a strategic use of quality is more difficult. The paper is articulated into two parts. Part one discusses the main obstacles facing the adoption of a quality based strategy by SSFs. A dynamic model for the adoption of this strategy over time, aimed at minimizing the risks for SSFs, is also presented.Part two describes the results of an empirical research, aimed at verifying the viability of quality based strategies in an industry composed only by SSFs, the shoe-machinery industry. The empirical research supports the viability of the model presented in the first part of the paper. 相似文献