Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: 

RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 110
Primeira ... 123456 ... Última
Imagem não selecionada

Imprime registro no formato completo
Technology Change: Sources and Impediments AgEcon
Ranis, Gustav; Irons, Mallory; Huang, Yanjing.
There is little doubt that technology change, both in terms of its process and quality dimensions, represents the principal driving force to explain comparative economic performance at both micro and macro levels. This paper examines the sources of technology change and the impediments to the full realization of its opportunities, both abstractly and in the context of a comparison among six typologically diverse developing countries. Among the external sources, we examine the roles of trade, foreign patents and FDI; among the internal sources we examine the roles of investment, domestic R&D, domestic patents, S&T personnel and secondary education alternatives. Among impediments, we analyze certain public and private policy frameworks which tend...
Tipo: Working Paper Palavras-chave: Development; Technological Change; Research and Development/Tech Change/Emerging Technologies; O11; O14; O33.
Ano: 2011 URL: http://purl.umn.edu/118647
Imagem não selecionada

Imprime registro no formato completo
Estimation of Actual and potential adoption rates and determinants of a new technology not universally known in the population: The case of NERICA rice varieties in Guinea AgEcon
Diagne, Aliou; Sogbossi, Marie-Josee; Simtowe, Franklin; Diawara, Sekou; Diallo, Abdoulaye Sadio; Barry, Alpha Bacar.
The NERICA (New Rice for Africa) rice varieties, developed by the Africa Rice Center during the 1990s, are providing hopes for raising the productivity of upland rice farmers in Africa because of their reported high yield potential and adaptability to the African conditions. The varieties are new and not widely disseminated in farming communities and there is lot of interest in the donor community in knowing their potential for widespread adoption across sub-Saharan Africa (SSA). However, when a technology is new and the target population is not universally exposed it, the observed sample adoption rate and classical models of adoption widely used in adoption studies does not inform reliably on its potential adoption and constraint to it in the full...
Tipo: Conference Paper or Presentation Palavras-chave: NERICA varieties; Technology Diffusion and adoption; Average Treatment Effect; Guinea; International Development; Research Methods/ Statistical Methods; C13; O33; Q12; Q16.
Ano: 2009 URL: http://purl.umn.edu/51644
Imagem não selecionada

Imprime registro no formato completo
Does the structure of agricultural science and technology policy system matter in developing country agricultural productivity growth trends? Evidence from Kenya and Uganda AgEcon
Mugunieri, Godiah Lawrence; Obare, Gideon A.; Omamo, Steven Were.
Paper to be presented at the IAAE Conference
Tipo: Conference Paper or Presentation Palavras-chave: Agricultural science and technology; Policy system; Developing countries; Food Security and Poverty; Productivity Analysis; C22; O12; O33.
Ano: 2009 URL: http://purl.umn.edu/50538
Imagem não selecionada

Imprime registro no formato completo
Spatial Development AgEcon
Desmet, Klaus; Rossi-Hansberg, Esteban.
We present a theory of spatial development. A continuum of locations in a geographic area choose each period how much to innovate (if at all) in manufacturing and services. Locations can trade subject to transport costs and technology diffuses spatially across locations. The result is an endogenous growth theory that can shed light on the link between the evolution of economic activity over time and space. We apply the model to study the evolution of the U.S. economy in the last few decades and find that the model can generate the reduction in the employment share in manufacturing, the increase in service productivity in the second part of the 1990s, the increase in land rents in the same period, as well as several other spatial and temporal patterns.
Tipo: Working or Discussion Paper Palavras-chave: Dynamic Spatial Models; Growth; Innovation; Land Rent Evolution; Structural Transformation; Technology Diffusion; Trade; Community/Rural/Urban Development; E32; O11; O18; O33; R12.
Ano: 2010 URL: http://purl.umn.edu/59852
Imagem não selecionada

Imprime registro no formato completo
Policy-Induced Technology Adoption: Evidence from the U.S. Lead Phasedown AgEcon
Kerr, Suzi; Newell, Richard G..
The theory of environmental regulation suggests that economic instruments, such as taxes and tradable permits, create more effective technology adoption incentives than conventional regulatory standards. We explore this issue for an important industry undergoing technological responses to a dramatic decrease in allowed pollution levels - the petroleum industry's phasedown of lead in gasoline. Using a panel of refineries from 1971 to 1995, we provide some of the first direct evidence that alternative policies affect the pattern of adoption in expected ways. Importantly, we find that the tradable permit system used during the lead phasedown provided incentives for more efficient technology adoption decisions. Where environmentally appropriate, this suggests...
Tipo: Working or Discussion Paper Palavras-chave: Technology; Adoption; Diffusion; Environment; Regulation; Lead; Gasoline; Tradable permit; Incentive-based policy; Research and Development/Tech Change/Emerging Technologies; C41; L71; O31; O33; Q28; Q48.
Ano: 2001 URL: http://purl.umn.edu/10834
Imagem não selecionada

Imprime registro no formato completo
Dynamics of Structural Transformation: Understanding the Key Factors That Drive Innovative Activities in Selected Asian and African Countries AgEcon
Badibanga, Thaddee Mutumba; Diao, Xinshen; Roe, Terry L.; Somwaru, Agapi.
This paper develops a metric of structural transformation that can account for the production of new varieties of goods embodying advancements in technological know-how and design. Our measure captures the dynamics of an economy’s transformation and can be viewed as an extension of the static measure developed by Hausmann and Klinger (2006). We apply this measure to four digit level sitc trade data of China, Malaysia and Ghana over the period 1962-2000. The results show the rapid transformation of the Chinese economy is characterized by two important factors: the high proximity of its export basket to the three main industrial clusters – capital goods, consumer durable goods, and intermediate inputs, and the increase in the values of the new goods...
Tipo: Working or Discussion Paper Palavras-chave: Structural Transformation; Discovery; Technological Change; International Development; F19; O14; O33; O40.
Ano: 2008 URL: http://purl.umn.edu/43890
Imagem não selecionada

Imprime registro no formato completo
Smallholders' Cost Efficiency in Mozambique: Implications for Improved Maize Seed Adoption AgEcon
Zavale, Helder; Mabaya, Edward T.; Christy, Ralph D..
Maize is an important staple in Mozambique. It is also a dominant crop produced by smallholder farmers. However, the actual maize yields, currently estimated at 1.4 tons/ha, fall short of potential yields of 5-6.5 tons/ha. With population growth rate increasingly exceeding agricultural (and maize) productivity growth rate, the government of Mozambique faces a serious problem of food insecurity and poverty alleviation. This study examines cost inefficiency among smallholder maize farmers in Mozambique, and the impact of improved maize seed adoption on cost efficiency. A Translog functional form is used to estimate the frontier cost function. A cost-inefficiency function is used to examine the factors that determine cost inefficiency among farmers....
Tipo: Conference Paper or Presentation Palavras-chave: Stochastic frontier; Technology adoption; Selection bias; Mozambique; Crop Production/Industries; Q12; Q16; D13; O33.
Ano: 2006 URL: http://purl.umn.edu/25648
Imagem não selecionada

Imprime registro no formato completo
Modeling International Trends in Energy Efficiency and Carbon Emissions AgEcon
Stern, David I..
This study uses a stochastic production frontier to model energy efficiency trends, in 85 countries over a 37 year period. No structure is imposed on technological change over time, although differences in technology level across the countries are modelled as a stochastic function of explanatory variables. These variables are selected by a literature survey and a theoretical model of energy-efficient technology choice. An improvement in a country’s energy efficiency is measured as a reduction in energy intensity, while holding constant that economy’s mix of inputs and outputs. All other things remaining constant, the country using the least energy per unit output is on the global best-practice frontier. The model is used to derive decompositions of...
Tipo: Report Palavras-chave: Energy; Efficiency; Carbon; Emissions; Technological change; Between estimator; Environmental Economics and Policy; Resource /Energy Economics and Policy; O13; O33; O47; Q43; Q54; Q55; Q56.
Ano: 2010 URL: http://purl.umn.edu/94950
Imagem não selecionada

Imprime registro no formato completo
An impact evaluation of technology adoption by smallholders in Sichuan, China: the case of sweet potato-pig systems AgEcon
Lapar, Ma. Lucila A.; Ngoc Toan, Nguyen; Zou, Chengyi; Liu, Jinyuan; Li, Xianglin; Randolph, Thomas F..
We employ propensity score matching (PSM) framework to examine the impact of sweet potato-based feed technology adoption on household-based pig production in Sichuan, China. An ex post survey in six villages was conducted in 2009, of which five villages were in project intervention sites (exposed area) and one village in the same township but not exposed to project intervention (non-exposed area). We randomly selected 111 households in the exposed areas from the list of households previously interviewed in a baseline survey and 53 households from non-exposed area. Matching estimators such as nearest neighbor matching (NNM), radius matching (RM) and kernel matching (KM) were used to estimate average treatment effects. Results indicate positive net benefit...
Tipo: Conference Paper or Presentation Palavras-chave: Technology adoption; Impact assessment; Crop-livestock systems; Livestock Production/Industries; Production Economics; O22; O33; Q16.
Ano: 2011 URL: http://purl.umn.edu/100577
Imagem não selecionada

Imprime registro no formato completo
A Dynamic Decision Model of Technology Adoption under Uncertainty: Case of Herbicide-Resistant Rice AgEcon
Annou, Mamane Malam; Wailes, Eric J.; Thomsen, Michael R..
Herbicide-resistant (HR) rice technology is a potential tool for control of red rice in commercial rice production. Using an ex ante mathematical programming framework, this research presents an empirical analysis of HR rice technology adoption under uncertainty. The analysis accounts for stochastic germination of red rice and sheath blight to model a profit maximization problem of crop rotation among HR rice, regular rice, and soybeans. The results demonstrate that risk attitudes and technology efficiency determine adoption rates and optimal rotation patterns.
Tipo: Journal Article Palavras-chave: Biotechnology; Herbicide resistance; Mathematical programming; Profit maximization; Rice; Risk; Rotation; Technology; Adoption; Crop Production/Industries; Production Economics; Research and Development/Tech Change/Emerging Technologies; Q16; Q18; O33; C61.
Ano: 2005 URL: http://purl.umn.edu/43724
Imagem não selecionada

Imprime registro no formato completo
UNIVERSITY-INDUSTRY RELATIONSHIPS AND THE DESIGN OF BIOTECHNOLOGY RESEARCH AgEcon
Yang, Hui; Buccola, Steven T..
The central objective of the present paper is to examine how university bioscientists select their research agendas, with special attention to biotechnology firms' influence on those agendas. Among other issues, we will assess UIRs' potential effects on the private appropriability of the characteristics of bioengineered crop and animal varieties, and on the basicness and breadth of a scientist's research. Factors that potentially would affect scientists' research agenda include the university's size, reputation, resources, culture, and total government funding; the scientist's academic position and communication network; and the market power, cultures, and specialties of the biotech firms with which the university has research relationships. An...
Tipo: Conference Paper or Presentation Palavras-chave: Research and Development/Tech Change/Emerging Technologies; O31; O32; O33.
Ano: 2003 URL: http://purl.umn.edu/21985
Imagem não selecionada

Imprime registro no formato completo
How Large Are the Welfare Gains from Technological Innovation Induced by Environmental Policies? AgEcon
Parry, Ian W.H.; Pizer, William A.; Fischer, Carolyn.
This paper examines whether the welfare gains from technological innovation that reduces future abatement costs are larger or smaller than the "Pigouvian" welfare gains from optimal pollution control. The relative welfare gains from innovation depend on three key factors - the initially optimal level of abatement, the speed at which innovation reduces future abatement costs, and the discount rate. We calculate the welfare gains from innovation under a variety of different scenarios. Mostly they are less than the Pigouvian welfare gains. To be greater, innovation must reduce abatement costs substantially and quickly and the initially optimal abatement level must be fairly modest.
Tipo: Working or Discussion Paper Palavras-chave: Innovation; Welfare; Regulation; Endogenous; Technological; Change; R&D; Environmental Economics and Policy; Q16; Q28; O32; O33.
Ano: 2002 URL: http://purl.umn.edu/10621
Imagem não selecionada

Imprime registro no formato completo
Intellectual Property Rights, Migration, and Diaspora AgEcon
Naghavi, Alireza; Strozzi, Chiara.
In this paper we study theoretically and empirically the role of the interaction between skilled migration and intellectual property rights (IPRs) protection in determining innovation in developing countries (South). We show that although emigration from the South may directly result in the well-known concept of brain drain, it also causes a brain gain effect, the extent of which depends on the level of IPRs protection in the sending country. We argue this to come from a diaspora channel through which the knowledge acquired by emigrants abroad can flow back to the South and enhance the skills of the remaining workers there. By increasing the size of the innovation sector and the skill-intensity of emigration, IPRs protection makes it more likely for...
Tipo: Working or Discussion Paper Palavras-chave: Intellectual property rights; Migration; Technology transfer; Brain gain; Diaspora; Labor and Human Capital; O34; F22; O33; J24; J61.
Ano: 2011 URL: http://purl.umn.edu/115817
Imagem não selecionada

Imprime registro no formato completo
AN INITIAL INVESTIGATION OF THE POTENTIAL FOR HERMETIC PURDUE IMPROVED CROP STORAGE (PICS) BAGS TO IMPROVE INCOMES FOR MAIZE PRODUCERS IN SUB-SAHARAN AFRICA AgEcon
Jones, Michael; Alexander, Corinne E.; Lowenberg-DeBoer, James.
Pests like the larger grain borer (P. truncatus) and the maize weevil (S. zeamis) cause significant storage losses for African maize producers. The value of storage protection to a market-oriented farmer is a function of price seasonality, value loss prevention, and their opportunity costs of capital. Evidence suggests that hermetic technologies like Purdue Improved Crop Storage (PICS) bags can be effective against these key maize storage pests, but sustainable technology transfer requires that it be profitable for producers. This analysis references dry weight loss figures from key life science articles and builds on previous value loss research to provide a geographic model for potential storage technology adoption. PICS bag profitability with one and...
Tipo: Working or Discussion Paper Palavras-chave: Agricultural pests; Technology adoption; Maize; Larger grain borer; Hermetic storage; Storage economics; Agribusiness; International Development; Research and Development/Tech Change/Emerging Technologies; Q16; Q13; O33.
Ano: 2011 URL: http://purl.umn.edu/115554
Imagem não selecionada

Imprime registro no formato completo
Pollution Control in the Informal Sector: The Ciudad Juarez Brickmakers' Project AgEcon
Blackman, Allen; Bannister, Geoffrey J..
Low-technology unlicensed micro-enterprises known as "informal" firms are a significant source of pollution in developing countries that are virtually impossible to regulate in the conventional manner. This paper describes an example of an innovative and promising approach to the problem: the Ciudad Juarez Brickmakers' Project, a private-sector-led initiative aimed at abating highly polluting emissions from Ciudad Juarez, Mexico's approximately 300 informal brick kilns. We draw four lessons from the Project's history. First, private-sector-led initiatives can work -- indeed they may be more effective than public-sector-initiatives -- but they require strong public sector support. Second, necessary conditions for effective environmental management in the...
Tipo: Working or Discussion Paper Palavras-chave: Informal sector; Air pollution; Mexico; Brickmaking; Community pressure; Environmental Economics and Policy; O17; O22; O33; O54; Q25; L61.
Ano: 1998 URL: http://purl.umn.edu/10478
Imagem não selecionada

Imprime registro no formato completo
Dynamics of Structural Transformation: An Empirical Characterization in the Case of China, Malaysia, and Ghana AgEcon
Badibanga, Thaddee Mutumba; Diao, Xinshen; Roe, Terry L.; Somwaru, Agapi.
The paper develops a metric of structural transformation that can account for the production of new varieties of goods embodying advancements in technological know-how and design. Our measure captures the dynamics of an economy’s transformation and can be viewed as an extension of Hausmann and Klinger’s static measure. We apply our measure to four-digit-level SITC trade data of China, Malaysia, and Ghana over the period 1962–2000. The results show that two important factors characterize the rapid transformation of the Chinese economy: the high proximity of its export basket to three main industrial clusters—capital goods, consumer durable goods, and intermediate inputs—and the increase in the values of the new goods belonging to those three clusters....
Tipo: Working or Discussion Paper Palavras-chave: Structural transformation; Discovery; Technological change; International Development; F19; O14; O33; O40.
Ano: 2009 URL: http://purl.umn.edu/50004
Imagem não selecionada

Imprime registro no formato completo
Producing and Procuring Horticultural Crops with Chinese Characteristics: Why Small Farmers Are Thriving and Supermarkets Are Absent in Rural China AgEcon
Wang, Honglin; Dong, Xiaoxia; Huang, Jikun; Rozelle, Scott; Reardon, Thomas.
The supermarket revolution has arrived in China and is spreading as fast as or faster than anywhere in the world. As the demand for vegetables, fruit, nuts and other high valued products have risen, urban retailers are finding new venues seized on niche and today have over $55 billion in sales, more than a third of the urban food market. However, the experience of many developing countries suggests that there could be serious distributional impacts of the rising of supermarkets. There is concern among policy makers and academics that poor, small farmers might be excluded from market. The main goal of our paper is to understand what types of farmers have been able to participate in the horticultural revolution, how they interact with markets and how...
Tipo: Conference Paper or Presentation Palavras-chave: Horticulture; Modern Supply Chains; Farmer Impacts; Poverty; China; Crop Production/Industries; O33; O53; Q13.
Ano: 2006 URL: http://purl.umn.edu/25762
Imagem não selecionada

Imprime registro no formato completo
Growth and Technological Leadership in US Industries: A Spatial Econometric Analysis at the State Level, 1963–-1997 AgEcon
Pede, Valerien O.; Florax, Raymond J.G.M.; de Groot, Henri L.F..
For several decades, cross-country analyses have dominated the literature on economic growth. Recently, these analyses have been extended to include sectoral variation as well as spatial variation across sub-national regions. This paper investigates economic growth and potential determinants of the process of catch-up to technology leaders for several economic sectors, using data for the lower 48 US states from 1963 through 1997. We analyze the potential influence of factors such as human capital, and geographical distance to the technology leader. A spatially explicit growth model in which technological progress is endogenously determined is used to model productivity growth in nine US industries, ranging from mining to government, and including a...
Tipo: Conference Paper or Presentation Palavras-chave: Regional economic growth; Convergence; Industry level; Technological leadership; Spatial econometrics; Industrial Organization; C21; I23; O33; R12.
Ano: 2007 URL: http://purl.umn.edu/9691
Imagem não selecionada

Imprime registro no formato completo
THEME OVERVIEW: BRINGING BROADBAND TO RURAL AMERICA AgEcon
Barnes, James N..
Tipo: Journal Article Palavras-chave: Broadband; Internet; Regional Economic Development; Rural Regions; Community/Rural/Urban Development; R12; O33; O57; R11.
Ano: 2010 URL: http://purl.umn.edu/100801
Imagem não selecionada

Imprime registro no formato completo
ECONOMIC IMPACTS OF GENETICALLY MODIFIED CROPS IN CHINA AgEcon
Huang, Jikun; Hu, Ruifa; van Meijl, Hans; van Tongeren, Frank W..
China has made a major investment in biotechnology research. Genetically modified (GM) cotton is widely adopted and the list of GM technologies in trials is impressive. At the same time there is an active debate on when China should commercialize its GM food crops. The overall goal of this paper is to provide an economy-wide assessment of these issues under various scenarios. Based on a unique data from empirical micro-level study and field trial in China and a modified GTAP model, our results indicate that the development of biotechnology has an important impact on China's production, trade and welfare. Welfare gains far outweigh the public biotechnology research expenditures. Most gains occur inside China. Policy makers should put less weight on...
Tipo: Conference Paper or Presentation Palavras-chave: Economic impacts; Biotechnology; Genetically modified crops; China; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies; C68; D58; F13; O33; Q17; Q18.
Ano: 2003 URL: http://purl.umn.edu/25883
Registros recuperados: 110
Primeira ... 123456 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional