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1.
2.
Giovanni Dosi Marco Grazzi Luigi Marengo Simona Settepanella 《The Journal of industrial economics》2016,64(4):875-907
The paper presents a new framework to assess firm level heterogeneity and to study the rate and direction of technical change. Building on the analysis of revealed short‐run production functions by Hildenbrand ( 1981 ), we propose the (normalized) volume of the zonotope composed by vectors‐firms as indicator of inter‐firm heterogeneity. Moreover, the angles that the zonotope's main diagonal form with the axes provide a measure of the rates and directions of productivity change. The proposed framework also accounts for n‐inputs and m‐outputs and, crucially, the measures of heterogeneity and technical change do not require many of the standard assumptions from production theory. 相似文献
3.
We provide specific qualifications in order that Kuhn–Tucker type Euler equations and transversality conditions at infinity
hold in stochastic equilibrium models with heterogeneous agents and where assets are traded in sequential markets. It is not
assumed that uncertainty is modeled as an event-tree structure or that preferences are necessarily bounded. We also describe
an important class of preferences based on bounded relative risk aversion which yields relevant simplifications. Our results
are used to establish conditions that rule out asset pricing bubbles. Specific examples of economies with bubbles are also
discussed.
Received: 28 January 2002 / Accepted: 19 July 2002
We are grateful to the editor and an anonymous referee for their valuable comments. This research was partially supported
by MURST (Italy), National Group on “Nonlinear Dynamics and Stochastic Models in Economics and Finance”. 相似文献
4.
Quality & Quantity - Economists recognize that the local availability of higher human capital represents significant knowledge spillovers, especially for innovation process. This research... 相似文献
5.
Panel data and descriptor for energy econometrics – an efficiency,resilience and innovation analysis
Quality & Quantity - The work at hand presents a new extensive panel dataset for energy economics, econometrics and policy. The referred dataset is made of 5000 observations circa, including 6... 相似文献
6.
Luigi Zingales 《The Review of Austrian Economics》2011,24(3):235-249
Financial transactions require trust. This paper analyzes the role of trust in the context of the 2008 financial crisis. In order to find a role for trust, we need to find a role for trust in a standard economic model which differs from the rational expectation of the equilibrium outcome. It is argued that trust dropped dramatically in the Fall of 2008. The consequences and effects of this drop in trust are discussed. 相似文献
7.
Vincenzo Denicolò Luigi Alberto Franzoni 《Journal of Economics & Management Strategy》2004,13(3):517-538
We analyze optimal patent design when innovators can rely on secrecy to protect their innovations. Secrecy has no fixed term but does not preclude accidental disclosure nor independent creation by other inventors. We derive the optimal scope of the rights conferred to such second inventors, showing that if the patent life is set optimally, second inventors should be allowed to patent and to exclude first inventors who have relied on secrecy. We then identify conditions under which it is socially desirable to increase patent life as much as is necessary to induce first inventors to patent. The circumstances in which it is preferable that they rely on secrecy seem rather limited . 相似文献
8.
In this study we compare the nano-patent landscapes of China and Japan in order to assess how their structures (type, fragmentation and concentration of patent ownership) affect the organization of the nanotechnology industry. We also analyze technology policy in order to assess how these interventions support technology transfer and nano-exploitation through university–industry collaboration and technology entrepreneurship. Drawing upon 20,365 patent families related to carbon nanotubes from 1994 to present, we found that two dissimilar technology policies boosting national innovation system emerged: China is more focused on forging an anchor-tenant model, while Japan exhibits a more industry-oriented model through demand-side policy intervention. Implications for firms? strategies and policy makers are discussed. 相似文献
9.
When testing for the equality of two distributions in a case-control design with treatment effects presumed to act possibly
on more than one aspect, different tests may be properly considered for testing for different features of a null hypothesis,
leading to the multiple aspect testing issue. Two different aspects are therefore of interest: the location-aspect, based
on the comparison of location indexes, and the distributional-aspect, based on the comparison of the empirical distribution
functions. A simulation study shows that the combined testing procedure exhibits a good robust overall performance, and an
application in biomedical research is also presented. 相似文献
10.
A key question about human societies is how social norms of cooperation are enforced. Subjects who violate norms are often
targeted by their peers for punishment. In an experiment with small teams we examine whether subjects treat punishment itself
as a second-order public good. Results do not support this view and rather suggest a hard-wired taste for punishment; subjects
are engaged in a cooperative task but ignore the public good characteristics of punishment. 相似文献