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651.
In recent years, diffusion models for interest rates became very popular. In this paper, we perform a selection of a suitable diffusion model for the Italian short rate. Our data set is given by the yields on 3‐month BOT (Buoni Ordinari del Tesoro), from 1981 to 2001, for a total of 470 observations. We investigate among stochastic volatility models, paying more attention to affine models. Estimating diffusion models via maximum likelihood, which would lead to efficiency, is usually unfeasible because the transition density is not available. Recently, Gallant and Tauchen (1996) proposed a method of moments which gains full efficiency, hence its name of Efficient Method of Moments (EMM); it selects the moments as the scores of an auxiliary model, to be computed via simulation; thus, EMM is suitable to diffusions whose transition density is unknown, but which are convenient to simulate. The auxiliary model is selected among a family of densities which spans the density space. As a by‐product, EMM provides diagnostics that are easy to compute and interpret. We find evidence that one‐factor models and multi‐factor affine models are rejected, while a logarithmic specification of the volatility provides the best fit to the data . 相似文献
652.
Growth, income distribution, and democracy: What the data say 总被引:35,自引:5,他引:35
Roberto Perotti 《Journal of Economic Growth》1996,1(2):149-187
This paper investigates the relationship between income distribution, democratic institutions, and growth. It does so by addressing three main issues: the properties and reliability of the income distribution data, the robustness of the reduced form relationships between income distribution and growth estimated so far, and the specific channels through which income distribution affects growth. The main conclusion in this regard is that there is strong empirical support for two types of explanations, linking income distribution to sociopolitical instability and to the education/fertility decision. A third channel, based on the interplay of borrowing constraints and investment in human capital, also seems to receive some support by the data, although it is probably the hardest to test with the existing data. By contrast, there appears to be less empirical support for explanations based on the effects of income distribution on fiscal policy. 相似文献
653.
Francesco Bosello Roberto Roson Richard S. J. Tol 《Environmental and Resource Economics》2007,37(3):549-571
The economy-wide implications of sea level rise in 2050 are estimated using a static computable general equilibrium model.
This allows for a better estimate of the welfare effects of sea level rise than the common direct cost estimates; and for
an estimate of the impact of sea level rise on greenhouse gas emissions. Overall, general equilibrium effects increase the
welfare costs of sea level rise, but not necessarily in every sector or region. In the absence of coastal protection, economies
that rely most on agriculture are hit hardest. Although energy is substituted for land, overall energy consumption falls with
the shrinking economy, hurting energy exporters. With full coastal protection, GDP increases, particularly in regions with
substantial dike building, but utility falls, least in regions that protect their coasts and export energy. Energy prices
rise and energy consumption falls. The costs of full protection exceed the costs of losing land. The results also show direct
costs – the usual method for estimating welfare changes due to sea level rise – are a bad approximation of the general equilibrium
welfare effects; previous estimates of the economic impact of sea level rise are therefore biased.
相似文献
654.
Gian Italo Bischi Roberto Dieci Giorgio Rodano Enrico Saltari 《Journal of Evolutionary Economics》2001,11(5):527-554
We consider a Kaldor-type discrete-time nonlinear business cycle model in income and capital, where investment is assumed
to depend both on the difference between normal and current levels of capital stock, and on the difference between the current
income and its normal level, through a nonlinear S-shaped increasing function. As usual in Kaldor business cycle models, one
or three steady states exist, and the standard analysis of the local stability and bifurcations suggests that endogenous oscillations
occur in the presence of only one unstable equilibrium, whereas the coexistence of three equilibria is characterized by bi-stability,
the central equilibrium being on the boundary which separates the basins of the two stable ones. However, a deeper analysis
of the global dynamic properties of the model in the parameter ranges where three steady states exist, reveals the existence
of an attracting limit cycle surrounding the three steady states, leading to a situation of multistability, with a rich and
complex dynamic structure. 相似文献
655.
This paper concerns theory and evidence of the monetary transmission mechanisms. Current research has deeply investigated factors, such as dependence of firms on bank credit, that amplify the impact of monetary policy impulses on aggregate demand exerting strong but temporary effects on output and employment. We present an intertemporal macroeconomic equilibrium model of a competitive economy where current production is financed by bank credit, and then we use it to identify supply–side effects of the credit transmission mechanism in data drawn from the Italian economy. We find evidence that the 'credit variables' identified by the model – the overnight rate as a proxy of monetary policy and a measure of credit risk – have permanent effects on employment and output by altering credit supply conditions to firms.
To save on space, mathematical proofs, statistical tests and data sources have been gathered in two separate appendices that can be examined on request.
(J.E.L.: E2, E5). 相似文献
To save on space, mathematical proofs, statistical tests and data sources have been gathered in two separate appendices that can be examined on request.
(J.E.L.: E2, E5). 相似文献
656.
657.
658.
Aurora García-Gallego Nikolaos Georgantzís Roberto Hernán-González Praveen Kujal 《Environmental and Resource Economics》2012,53(1):1-23
We experimentally test how a private monopoly, a duopoly and a public utility allocate water of differing qualities to households and farmers. Most of our results are in line with the theoretical predictions. Overexploitation of the resources is observed independently of the market structure. Stock depletion for the public utility is the fastest, followed by the private duopoly and private monopoly. On the positive aspects of centralized public management, we find that the average quality to price ratio offered by the public monopoly is substantially higher than that offered by the private monopoly or duopoly. 相似文献
659.
Alex Wilhans Antonio Palludeto Roberto Alexandre Zanchetta Borghi 《Review of Political Economy》2021,33(1):126-144
ABSTRACT This paper analyzes the role played by the Brazilian Development Bank (BNDES) in different periods of Brazil’s development process since its founding in 1952. The bank’s history is nonlinear, varying with socio-economic and political changes over time. Four major periods in its history are: (i) from its creation to the debt crisis in the 1980s, a period known as ‘developmentalism’; (ii) the neoliberal movement of the 1990s; (iii) the reintroduction of the BNDES as a relevant tool for development in the 2000s; and (iv) a new neoliberal movement that arose beginning in mid-2016. Each of these periods is characterized by certain development conventions that shape how institutions, such as the BNDES, operate, and at the same time are shaped by them. In contrast to mainstream economics, which focuses on a one-size-fits-all institution for development, this paper evaluates the interactions between development and institutions as historical processes, with an emphasis on the prevailing development conventions. The trajectory and different roles assumed by the BNDES over time exemplify this permanent relationship, rejecting the idea that particular types of institutions are related to development. 相似文献
660.
Most executives think of decision making as a singular event that occurs at a particular point in time. In reality, though, decision making is a process fraught with power plays, politics, personal nuances, and institutional history. Leaders who recognize this make far better decisions than those who persevere in the fantasy that decisions are events they alone control. That said, some decision-making processes are far more effective than others. Most often, participants use an advocacy process, possibly the least productive way to get things done. They view decision making as a contest, arguing passionately for their preferred solutions, presenting information selectively, withholding relevant conflicting data so they can make a convincing case, and standing firm against opposition. Much more powerful is an inquiry process, in which people consider a variety of options and work together to discover the best solution. Moving from advocacy to inquiry requires careful attention to three critical factors: fostering constructive, rather than personal, conflict; making sure everyone knows that their viewpoints are given serious consideration even if they are not ultimately accepted; and knowing when to bring deliberations to a close. The authors discuss in detail strategies for moving from an advocacy to an inquiry process, as well as for fostering productive conflict, true consideration, and timely closure. And they offer a framework for assessing the effectiveness of your process while you're still in the middle of it. Decision making is a job that lies at the very heart of leadership and one that requires a genius for balance: the ability to embrace the divergence that may characterize early discussions and to forge the unity needed for effective implementation. 相似文献