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Registros recuperados: 12
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A State Dependent Regime Switching Model of Dynamic Correlations AgEcon
Tejeda, Hernan A.; Goodwin, Barry K.; Pelletier, Denis.
Replaced with revised version of paper 07/29/09.
Tipo: Conference Paper or Presentation Palavras-chave: Dynamic correlations; Regime switching; State dependent probabilities; Thresholds; Spillovers; Research Methods/ Statistical Methods.
Ano: 2009 URL: http://purl.umn.edu/49370
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Beyond semi-dwarf wheat yield increases: impacts on the Australian wheat industry of on-going spillovers from the International Maize and Wheat Improvement Center AgEcon
Brennan, John P..
Wheat genetic materials developed from research at the International Maize and Wheat Improvement Center (CIMMYT) in Mexico for developing countries have provided spillover benefits to Australia. Varieties developed from those genetic materials have resulted in yield increases in Australia. While the initial impact came through the introduction of higher-yielding semi-dwarf wheat crops, those impacts have continued in the post-semidwarf period. CIMMYT’s success in developing countries has also reduced the world price for wheat. While the lower prices affect returns in Australia, the increased yields in Australia from the CIMMYT spillovers from both the semi-dwarfs and the postsemidwarf phases have provided benefits to Australia averaging A $30 million per...
Tipo: Article Palavras-chave: R&D evaluation; R&D policy; Spillovers; Technology adoption; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2007 URL: http://purl.umn.edu/118519
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Economic Benefits and Drawbacks of Cities and their Growth Implications AgEcon
Tisdell, Clement A..
Recent trends in the growth of cities particularly in developing countries (and especially in India and China) are identified. Beneficial and negative sharing mechanisms influencing the growth of cities are examined. Economic benefits of agglomeration arise not so much from the type of economic goods available in a city location (such as common property or local public goods) but from the enhanced operation of processes of economic exchange. Two theoretical implications of the growth of cities are considered, namely: (1) city growth results in growing inequality of income and wealth within the city and (2) a city will expand beyond its optimal size. Nevertheless, the growth of cities is linked with increased levels of per capita income nationally....
Tipo: Working or Discussion Paper Palavras-chave: Agglomeration economies; China; City-sizes; Common property; Economic growth; Globalization; Income distribution; India; Open-access resources; Quasi-public goods; Spillovers; Community/Rural/Urban Development.
Ano: 2009 URL: http://purl.umn.edu/90626
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Emissions Pricing, Spillovers, and Public Investment in Environmentally Friendly Technologies AgEcon
Fischer, Carolyn.
In a second-best world of below-optimal pollution pricing, the public return to R&D may be greater than under Pigouvian pricing, due to excess benefits of increasing abatement, or it may be lower, since private actors lack the incentives to take full advantage of the new, cleaner technologies. This paper uses a simple model to demonstrate the interaction between environmental policies, R&D externalities, and the social return to innovation. The results indicate that strong public support for innovation is only justified if at least a moderate emissions policy is in place and spillover effects are significant. Furthermore, in most cases, policy constraints that limit regulatory burdens tend to further limit the scope for public support, even when...
Tipo: Working or Discussion Paper Palavras-chave: Emissions price; Technological innovation; Spillovers; R&D policy; Environmental Economics and Policy; Q28; O38; H23.
Ano: 2004 URL: http://purl.umn.edu/10648
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Leveraging regional growth dynamics in African agriculture AgEcon
Abdulai, Awudu; Johnson, Michael; Diao, Xinshen.
This study focuses on public investments and policy reforms for leveraging growth spillovers at the Africa regional level. It reviews first the theory and evidence of knowledge and growth spillovers generally and second the evidence in the African context. Given the limited and scattered evidence of actual past spillovers, it reviews recent ex ante simulations using partial and general equilibrium models to stress the potential for spillovers from greater cooperation in agricultural research, and from trade liberalization, policy harmonization and investments in infrastructure. The results show that permitting greater crossborder transfers and adopting improved technologies could have large spillover multiplier effects on overall economic welfare in the...
Tipo: Journal Article Palavras-chave: Sub-Saharan Africa; Regional cooperation; Spillovers; Agricultural development; International Development.
Ano: 2006 URL: http://purl.umn.edu/57021
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Price Volatility, Nonlinearity, and Asymmetric Adjustments in Corn, Soybean, and Cattle Markets: Implications of Ethanol-Driven (Market) Shocks AgEcon
Tejeda, Hernan A.; Goodwin, Barry K..
Grain prices have risen sharply since 2005 and 2006 affecting livestock markets by increasing feed prices and leading to significant volatility shocks. The high price levels and magnitude of sustained high volatilities has raised concerns for many sectors of the economy, in particular those with direct relation to these markets. Policy makers are analyzing the interrelationships among these markets, and the effects of energy market shocks on agricultural markets. This study considers a threshold structure in a multivariate time-series model that evaluates these market linkages, capturing asymmetric correlations between grain and livestock prices, including volatility spillovers. We empirically study the impact of corn usage for ethanol production in the...
Tipo: Conference Paper or Presentation Palavras-chave: Price volatility; Market linkages; Thresholds; Ethanol-driven shocks; Asymmetric correlations; Spillovers; Agribusiness; Agricultural and Food Policy; Agricultural Finance; Demand and Price Analysis; Farm Management; Financial Economics; Public Economics; Research Methods/ Statistical Methods.
Ano: 2009 URL: http://purl.umn.edu/53039
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PRIVATE R&D INVESTMENTS IN AGRICULTURE: THE ROLE OF INCENTIVES AND INSTITUTIONS AgEcon
Alfranca, Oscar; Huffman, Wallace E..
This paper presents econometric evidence of the effects of economic incentives and institutions on national aggregate private agricultural R&D investments. A model is proposed and fitted to annual data for seven European Union countries, 1984-1995. We find strong impacts of both incentives and institutions on private agricultural R&D investment, and including institutional factors strengthens the story and in some cases changes greatly the results. In particular, we reject the hypothesis that quality of property rights does not matter. We find that stronger contract enforcement, more efficient public bureaucracies, and stronger patent rights lead to larger aggregate private agricultural R&D investment, other things equal. Furthermore, we...
Tipo: Working or Discussion Paper Palavras-chave: Private R&D; Incentives; Institutions; Property rights; European Union; Agriculture; Spillovers; Research and Development/Tech Change/Emerging Technologies.
Ano: 1999 URL: http://purl.umn.edu/18246
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Regionale Verteilung von Schutzgebieten in Deutschland - Eine empirisch gestützte Bewertung der räumlichen Implikationen des Natur- und Landschaftsschutzes per Ordnungsrecht AgEcon
Urfei, Guido.
The following analysis leads to an empirically based ranking, which embodies political decision makers to evaluate the necessity of horizontal co-ordination for different issues concerning nature and landscape conservation. First of all the relevant German law and order as well as its spatial conservation categories will be explained (Chapter 2). Secondly the conclusions concerning the spatial inhomogeneity of conservation areas and their implications to environmental-policy are substantiated by the principles of the economic theory of environmental federalism (Chapter 3). Thirdly the definition of suitable concentration indices follows, their quantification for examples of conservation categories (Chapter 4), and the draw up of political recommendations,...
Tipo: Journal Article Palavras-chave: Nature conservation policy; Spillovers; Federalism; Spatial impacts; Community/Rural/Urban Development; Environmental Economics and Policy.
Ano: 2002 URL: http://purl.umn.edu/98260
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The Effect of Spillovers and Congestion on the Segregative Properties of Endogenous Jurisdiction Structure Formation AgEcon
Oddou, Remy.
This paper analyzes the effect of spillovers and congestion of local public goods on the segregative properties of endogenous formation of jurisdiction. Households living in the same place form a jurisdiction and produce a local public good, that creates positive spillovers in other jurisdictions and suffers from congestion. In every jurisdiction, the production of the local public good is financed through a local tax on household's wealth. Local wealth tax rates are democratically determined in all jurisdictions. Households also consume housing in their jurisdiction. Any household is free to leave its jurisdiction for another one that would increase its utility. A necessary and sufficient condition to have every stable jurisdiction structure segregated by...
Tipo: Working or Discussion Paper Palavras-chave: Jurisdictions; Segregation; Spillovers; Congestion; Environmental Economics and Policy; C78; D02; H73; R13.
Ano: 2011 URL: http://purl.umn.edu/108259
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The Geography and Channels of Diffusion at the World's Technology Frontier AgEcon
Keller, Wolfgang.
Convergence in per capita income turns on whether technological knowledge spillovers are global or local. Global spillovers favor convergence, while a geographically limited scope of knowledge diffusion can lead to regional clusters of countries with persistently different levels of income per capita. This paper estimates the importance of geographic distance for technology diffusion, how this changed over time, and whether international trade, foreign direct investment, and communication flows serve as important channels of diffusion. The analysis is based on examining the productivity effects of R&D expenditures in the world's seven major industrialized countries between 1970 and 1995. First, I find that the scope of technology diffusion is severely...
Tipo: Working or Discussion Paper Palavras-chave: Convergence; Divergence; Economic Geography; Total Factor Productivity; Technology Diffusion; International Trade; Foreign Direct Investment; Communication; Spillovers; Research and Development/Tech Change/Emerging Technologies; 03; F2.
Ano: 2001 URL: http://purl.umn.edu/26140
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The Optimal Climate Policy Portfolio when Knowledge Spills Across Sectors AgEcon
Massetti, Emanuele; Nicita, Lea.
This paper studies the implications for climate policy of the interactions between environmental and knowledge externalities. Using a numerical analysis performed with the hybrid integrated assessment model WITCH, extended to include mutual spillovers between the energy and the non-energy sector, we show that the combination between environmental and knowledge externalities provides a strong rationale for implementing a portfolio of policies for both emissions reduction and the internalisation of knowledge externalities. Moreover, we show that implementing technology policy as a substitute for stabilisation policy is likely to increase global emissions.
Tipo: Working or Discussion Paper Palavras-chave: Technical Change; Climate Change; Development; Innovation; Spillovers; Environmental Economics and Policy; C72; H23; Q25; Q28; O31; O41; Q54.
Ano: 2010 URL: http://purl.umn.edu/92912
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Under-connected and Over-connected Networks AgEcon
Buechel, Berno; Hellmann, Tim.
Since the seminal contribution of Jackson & Wolinsky 1996 [A Strategic Model of Social and Economic Networks, JET 71, 44-74] it has been widely acknowledged that the formation of social networks exhibits a general conflict between individual strategic behavior and collective outcome. What has not been studied systematically are the sources of inefficiency. We approach this omission by analyzing the role of positive and negative externalities of link formation. This yields general results that relate situations of positive externalities with stable networks that cannot be “too dense” in a well-defined sense, while situations with negative externalities tend to induce “too dense” networks.
Tipo: Working or Discussion Paper Palavras-chave: Networks; Network Formation; Connections; Game Theory; Externalities; Spillovers; Stability; Efficiency; Institutional and Behavioral Economics; D85; C72; L14.
Ano: 2009 URL: http://purl.umn.edu/50728
Registros recuperados: 12
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