Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 17
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Assessing the Potential for Payments for Watershed Services to Reduce Poverty in Guatemala AgEcon
Pagiola, Stefano; Zhang, Wei; Colom, Ale.
Payments for Environmental Services (PES) are being increasingly used as conservation instruments, particularly in Latin America. PES programs seek to capture part of the benefits derived from environmental services and channel them to natural resource managers who generate these services, thus increasing their incentive to conserve them. Many have assumed that these payments would go mostly to poor land users, and thus contribute to poverty reduction. There has been little empirical verification of this assumption to date, however. The PES approach was conceptualized as a mechanism to improve the efficiency of natural resource management, and not as a mechanism for poverty reduction. Pagiola et al. (2005) identified three main questions regarding the...
Tipo: Conference Paper or Presentation Palavras-chave: Payments for Environmental Services (PES); Watershed; Poverty; Guatemala; Environmental Economics and Policy; International Development.
Ano: 2008 URL: http://purl.umn.edu/42932
Imagem não selecionada

Imprime registro no formato completo
Assessing the potential for synergy in the implementation of Payment for Environmental Services (PES) programs: an empirical analysis in Costa Rica AgEcon
Zhang, Wei; Pagiola, Stefano.
Payment for environmental services (PES) is a promising mechanism for conservation. It also has the potential to contribute to social objectives such as poverty reduction. To promote synergy in the implementation of PES, however, a number of conditions on spatial, economic, ecological, and institutional feasibilities are essential. This study discusses factors affecting the synergy prospect of PES and provides a simple framework for assessing the potential for synergy in the implementation of PES, focusing on spatial correlation of thematic areas and funding availability for payments. We apply the framework to an empirical analysis of the “water funding” in Costa Rica, a new conservation financing source generated by water tariff revenue and will be...
Tipo: Conference Paper or Presentation Palavras-chave: Payment for Environmental Services (PES); Synergy; Poverty reduction; Watershed conservation; Biodiversity conservation; Costa Rica; Environmental Economics and Policy; International Development.
Ano: 2009 URL: http://purl.umn.edu/51794
Imagem não selecionada

Imprime registro no formato completo
Bankruptcy Risk and Imperfectly Enforced Emissions Taxes AgEcon
Stranlund, John K.; Zhang, Wei.
Under favorable but reasonable conditions, an imperfectly enforced emissions tax produces the efficient allocation of individual emissions control; aggregate emissions are independent of whether enforcement of the tax is sufficient to induce the full compliance of firms, and differences in individual violations are independent of firm-level differences. All of these desirable characteristics disappear when some firms under an emissions tax risk bankruptcy—the allocation of emissions control is inefficient, imperfect enforcement causes higher aggregate emissions, and financially insecure firms choose higher violations.
Tipo: Working or Discussion Paper Palavras-chave: Bankruptcy; Emissions Taxes; Limited Liability; Environmental Economics and Policy; Public Economics; Risk and Uncertainty; L51; Q28; Q58.
Ano: 2008 URL: http://purl.umn.edu/42127
Imagem não selecionada

Imprime registro no formato completo
Bankruptcy Risk and the Performance of Tradable Permit Markets AgEcon
Stranlund, John K.; Zhang, Wei.
We study the impact of bankruptcy risk on markets for tradable environmental and natural resource permits. We find that firms that risk bankruptcy demand more permits than if they were financially secure. Consequently, bankruptcy risk in a competitive market for tradable property rights causes an inefficient distribution of individual choices among regulated firms. Moreover, the equilibrium distribution of permits is not independent of the initial distribution of permits. In fact, the inefficiency that is associated with bankruptcy risk is mitigated if financially insecure firms are given a larger share of the initial allocation of permits.
Tipo: Working or Discussion Paper Palavras-chave: Bankruptcy; Tradable permits; Permit markets; Environmental Economics and Policy; L51; Q28; Q58.
Ano: 2007 URL: http://purl.umn.edu/7384
Imagem não selecionada

Imprime registro no formato completo
CHANGES IN CHINA'S URBAN FOOD CONSUMPTION AND IMPLICATIONS FOR TRADE AgEcon
Zhang, Wei; Wang, Qingbin.
Detailed data from 3,500 urban Chinese households are used to estimate demand elasticities and the impacts of regional and demographic variables for 17 food products through a two-stage budgeting procedure with complete demand systems. Results suggest that China's food consumption patterns will continue to shift from grains to high value food products and the ongoing transition in food consumption will affect China's domestic food markets and trade behavior.
Tipo: Conference Paper or Presentation Palavras-chave: Consumer/Household Economics; Demand and Price Analysis.
Ano: 2003 URL: http://purl.umn.edu/21986
Imagem não selecionada

Imprime registro no formato completo
FINANCIAL IMPACTS OF ALTERNATIVE PHOSPHORUS MANAGEMENT PRACTICES: THE CASE OF VERMONT DAIRY FARMS AgEcon
Zhang, Wei; Parsons, Robert L..
The Farm Level Income and Policy Simulation Modeling System (FLIPSim) is used to provide policymakers and dairy farmers estimated farm financial impact on the implementation of five field related Best Management Practices (BMP) designed to reduce phosphorus loading in Lake Champlain. Financial performance indicators are derived from deterministic and stochastic FLIPSim analyses for three Vermont dairy farms (60, 150, and 350 cows). Results indicate that residual management and conservation cropping incur the greatest financial impacts. Nutrient management increases income for the large and medium farms. None of the BMP's caused the farms to go out of business. However, the initial declining financial position of the small farm was hastened by the...
Tipo: Conference Paper or Presentation Palavras-chave: Livestock Production/Industries.
Ano: 2001 URL: http://purl.umn.edu/20766
Imagem não selecionada

Imprime registro no formato completo
INSTRUMENT CHOICE AND BUDGET-CONSTRAINED TARGETING AgEcon
Horan, Richard D.; Claassen, Roger; Agapoff, Jean; Zhang, Wei.
We analyze how choosing to use a particular type of instrument for agri-environmental payments, when these payments are constrained by the regulatory authority's budget, implies an underlying targeting criterion with respect to costs, benefits, participation, and income, and the tradeoffs among these targeting criteria. The results provide insight into current policy debates.
Tipo: Conference Paper or Presentation Palavras-chave: Research Methods/ Statistical Methods.
Ano: 2004 URL: http://purl.umn.edu/20387
Imagem não selecionada

Imprime registro no formato completo
Market Power and Shadow Prices for Nonrenewable Resources: An Empirical Dynamic Model AgEcon
Lin, C.-Y. Cynthia; Zhang, Wei.
This paper estimates a dynamic model of the world market for nine nonrenewable resources over the period 1970-2004, and tests whether the countries supplying a nonrenewable resource behaved as price-takers or oligopolists. The model generates estimates of the shadow price of the nine minerals with minimal functional form assumptions. The results show that the countries supplying hard coal, lead, and oil behaved as oligopolists during the study period, while the world market for other nonrenewable resources could be characterized as perfectly competitive. The shadow prices do not increase monotonically, which is evidence for stock effects in extraction costs. The shadow prices of most minerals peaked between 1970 and 1980.
Tipo: Conference Paper or Presentation Palavras-chave: Nonrenewable resources; Market power; Shadow price; Empirical dynamic model; Resource /Energy Economics and Policy; Q31; L13.
Ano: 2011 URL: http://purl.umn.edu/103397
Imagem não selecionada

Imprime registro no formato completo
Pest Control in the Presence of Pest Suppression by Natural Enemies AgEcon
Zhang, Wei; Swinton, Scott M..
The control of pests by their natural enemies represents an important ecosystem service that maintains the stability of agroecosystems and has the potential to mitigate pest control costs both to private producers and to society. Extending the “"economic threshold”" concept, this paper proposes an "“ecological economic threshold”" for pesticide use that takes into account the implicit cost of injury to natural enemies. By explicitly accounting for natural pest suppression, the ecological economic threshold can potentially make pest management more cost-effective while reducing dependence on toxic insecticides. The threshold is illustrated via an intra-seasonal dynamic bioeconomic model of soybean aphid management in Michigan, USA. A dynamic programming...
Tipo: Conference Paper or Presentation Palavras-chave: Environmental Economics and Policy.
Ano: 2006 URL: http://purl.umn.edu/21295
Imagem não selecionada

Imprime registro no formato completo
Potential Scrub Changes and Its Spatial Allocation under the New Zealand Emission Trading System AgEcon
Zhang, Wei; Power, William; Kerr, Suzi.
Under the New Zealand Emission Trading System (NZETS), post-1989 forestry land (the exotic or indigenous forest land that was not used for plantation on 31 December 1989) in New Zealand is eligible for reward for each tonne of CO2-eqv sequestrated by reverting from pasture to indigenous scrub. We use the Land Use in Rural New Zealand (LURNZ) model to conduct 2 simulations assuming that one tonne of CO2-eqv costs $25; The reference case is that no one has entered the NZETS, the other scenario is that the whole agriculture sector and indigenous forest (but not plantation) have entered the ETS. Each simulation estimates the amount of land use changes in dairy, sheep-beef and scrub from 2008 to 2015. By comparing these simulations, we identify the current use...
Tipo: Working or Discussion Paper Palavras-chave: Emission trading system; Scrub reversion; Agriculture; Environmental Economics and Policy; Land Economics/Use.
Ano: 2009 URL: http://purl.umn.edu/50896
Imagem não selecionada

Imprime registro no formato completo
Rethinking Ecosystem Services from an Intermediate Product Perspective AgEcon
Swinton, Scott M.; Zhang, Wei.
The Earth's ecosystems provide myriad goods and services that are essential to human wellbeing. This paper offers a typology of ecosystem services that emphasizes the means by which humans experience the service rendered. The typology distinguishes between services that are directly experienced, and those that are indirect. The paper offers an illustration of how indirect services can be valued when they contributed to production of a marketed product. The intermediate product method described is amenable to indirect services that are one stage removed (Tier 2), two stages removed (Tier 3), or even farther removed from the direct services that humans experience. The intermediate product approach to ecosystem service valuation is illustrated by an...
Tipo: Conference Paper or Presentation Palavras-chave: Environmental Economics and Policy.
Ano: 2005 URL: http://purl.umn.edu/19536
Imagem não selecionada

Imprime registro no formato completo
Short term effects of moderate carbon prices on land use in the New Zealand emissions trading system: LURNZ-climate land use change simulations AgEcon
Kerr, Suzi; Zhang, Wei; Power, William.
The New Zealand Emissions Trading Scheme (NZ ETS) was introduced through the Climate Change Response Act in September 2008 and remains in force. The forestry sector has been directly affected by the NZ ETS since 1 January 2008 and stationary energy, liquid fuels and industrial emissions have been affected since 1 July 2010. When it is fully implemented in 2015 it will cover all sources and gases including agricultural emissions. Using the Land Use in Rural New Zealand model (LURNZ), we simulate rural land use changes that could be driven by the NZETS in order that we can explore their potential implications for emissions and removals (sequestration) and rural incomes and land values. This paper documents our simulation methods and presents short term (up...
Tipo: Conference Paper or Presentation Palavras-chave: Crop Production/Industries; Environmental Economics and Policy; Industrial Organization; International Relations/Trade; Land Economics/Use; Livestock Production/Industries; Risk and Uncertainty.
Ano: 2010 URL: http://purl.umn.edu/96941
Imagem não selecionada

Imprime registro no formato completo
Spatially Optimal Habitat Management For Natural Pest Control Services AgEcon
Zhang, Wei; van derr Werf, Wopke; Swinton, Scott M..
The control of crop pests by their natural enemies represents an important ecosystem service that maintains the stability of agricultural systems and has the potential to mitigate pest control costs. Recently, there has been growing interest in enhancing natural control services via habitat management that provides resources for adult natural enemies, such as food and shelter. Management of natural enemy populations has received little attention in the economic literature on pest control. Most such prior studies have explored optimal chemical-based pest management. One recent paper developed a threshold-based pesticide decision rule to account for the presence of natural enemies. However, no prior studies have investigated economically optimal spatial...
Tipo: Conference Paper or Presentation Palavras-chave: Ecosystem services; Biological control; Natural enemies; Habitat management; Soybean aphid; Spatial optimization; Land use; Environmental Economics and Policy.
Ano: 2007 URL: http://purl.umn.edu/43030
Imagem não selecionada

Imprime registro no formato completo
THE ECONOMICS OF GREEN PAYMENTS FOR REDUCING AGRICULTURAL NONPOINT SOURCE POLLUTION IN THE CORN BELT AgEcon
Zhang, Wei; Horan, Richard D.; Claassen, Roger.
We develop a watershed-based model of green payments to examine how payments applied to different environmental performance measures compare on the basis of economic efficiency, equity, and environmental outcomes. We also explore how targeting in the specification of water quality goals (e.g., TMDLs) affects program performance.
Tipo: Conference Paper or Presentation Palavras-chave: Environmental Economics and Policy.
Ano: 2003 URL: http://purl.umn.edu/21939
Imagem não selecionada

Imprime registro no formato completo
The Effects of Driving Restrictions on Air Quality: São Paulo, Bogotá, Beijing, and Tianjin AgEcon
Lin, C.-Y. Cynthia; Zhang, Wei; Umanskaya, Victoria I..
In a typical driving restriction, vehicle use is restricted based on the vehicle’s license plate; one cannot drive vehicles with certain license plate numbers on certain days. Driving restrictions have been used as a method to reduce urban air pollution or traffic congestion because they are easy and inexpensive to implement. We investigate whether driving restrictions introduced in São Paulo, Bogotá, Beijing and Tianjin have improved air quality. Across different versions of the driving restrictions there is no evidence that the overall air quality at different places has been improved. However, several important results show up in this extensive analysis. Temporal shifting of driving is likely to appear when the restrictions are only effective during...
Tipo: Conference Paper or Presentation Palavras-chave: Driving restriction; Air quality; Environmental Economics and Policy.
Ano: 2011 URL: http://purl.umn.edu/103381
Imagem não selecionada

Imprime registro no formato completo
The Impact of Environmental Policy on Household Income and Activity Choice: Evidence from Sandstorm Source Control Program in North China AgEcon
Zhang, Wei; Liu, Can.
This paper uses household data to assess the near-term impact of the program on incomes and activity choices of rural households in areas where the sandstorm control program (Beijing and Tianjin Sandstorm Source Control Program) was implemented. Central to our analysis is a unique panel survey conducted by the State Forestry Administration covering years from 1998 to 2003 in 17 counties in three Northern provinces Hebei, Shanxi, and Inner Mongolia (autonomous region). The essential feature of the program is an annual subsidy provided to participating farmers to cover costs associated with permanent retirement of farm land and the planting of saplings. We first look at the impact of program participation on household incomes and, not surprisingly, observe...
Tipo: Conference Paper or Presentation Palavras-chave: Environmental program; Impact; Household income; Activity choice; Farmland retirement payment; Sandstorm; Desertification; Environmental Economics and Policy.
Ano: 2005 URL: http://purl.umn.edu/19482
Imagem não selecionada

Imprime registro no formato completo
Understanding Small-Holder Constraints to Jatropha Investment AgEcon
Hill, Ruth Vargas; Msangi, Siwa; Zhang, Wei.
Tipo: Conference Paper or Presentation Palavras-chave: Financial Economics; Resource /Energy Economics and Policy.
Ano: 2010 URL: http://purl.umn.edu/61843
Registros recuperados: 17
Primeira ... 1 ... 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