4,586 research outputs found
A profile of border protection in Egypt : an effective rate of protection approach adjusting for energy subsidies
This study examines recent effective rates of protection across the Egyptian economy, using an ad valorem price wedge introduced by nontariff barriers and energy subsidies, and compares today's effective rates of protection with those of a decade ago. The study uses 23 aggregated sectors from input-output matrix information. Although trade liberalization since the late-1990s has had a considerable impact in reducing protection of some industries, some sectors, such as the food and tobacco sector, remain relatively highly protected, due to tariff escalation and nontariff barriers, and due to energy subsidies. Energy subsidies are not formally sector specific but do favor sectors that are energy intensive (of particular note is the electricity sector). It appears that energy pricing is part of a strategy to subsidize and promote certain industries and in effect offset the dis-protection or taxation that results from tariffs on intermediate inputs. The case of the cement sector is notable because energy subsidies appear to almost exactly offset the negative impacts of tariffs and indirect taxes. The fertilizer sector has zero nominal tariffs, benefiting agriculture, and so a negative effective rate of protection due simply to tariffs on intermediate inputs. However, the fertilizer sector ends up with a very high a positive total effective rate of protection due to energy subsidies.Transport Economics Policy&Planning,Energy Production and Transportation,Economic Theory&Research,Taxation&Subsidies,International Trade and Trade Rules
Economic reform to stimulate growth and reduce poverty: The Latin American experience
Poverty reduction, Hunger, Policy, Poverty, Poverty reducing growth, Latin America,
Funding: Patterns and Guideposts in the Nonprofit Sector
Although funding is a pressing concern for nonprofit organizations across the United States, detailed information about how dollars flow within the sector is hard to come by. For example, are there distinct patterns to the ways in which nonprofit organizations are funded? If the answer to this question is "yes," those patterns could provide important "guideposts" for similar organizations planning their funddevelopment strategies.To begin answering this question, the Bridgespan Group researched the funding for three samples of nonprofit organizations using Form 990 returns, complemented by company-specific reports and personal interviews. 1. The largest organizations tend to rely on a single type of funding for the majority of their revenue, rather than having a balanced mix from a variety of funders. Among youth services and environmental advocacy organizations, there are distinct transition points across a spectrum ofrevenue sizes where organizations move from heterogeneous to singletypefunding.2. Among the largest organizations, the kind of work an organization does influences, but does not dictate, the identity of its dominant funding type.3. In the fields we selected for in-depth analysis -- youth services and environmental advocacy -- growth to a significant size is extremely rare, and the largest organizations control most of the resources.4. In youth services and environmental advocacy, there seem to be transition points in the typical funding mix used by organizations of different sizes, suggesting that the size of an organization influences its dominant funding type
Latin America's "New Open Regionalism" and WTO Negotiations: the case of agriculture
This article analyses past trade trends and agricultural protectionism in Latin American agriculture, by examining observed changes in Latin American agriculture and trade policies over the last 20 years that have led to what the authors call the "New Open Regionalism". It also discussed the conflicting interests and various trading positions taken up by Latin American countries in multilateral trade talks, as a result of the strong heterogeneity between net agricultural exporters and importers. The authors show that the repeated failure of the Doha round of trade talks opens the door for bilateral or sub-regional free trade agreements, concluding with the prediction that regional integration in Latin America will come about as a result of agreements between various sub-regional trade blocs. The weakness of internal demand makes the development of the region's agri-food sector highly dependent on exports, the growth of which is one of the main economic drivers in these countries, particularly net exporters. In addressing the issue of the distribution of profits from trade liberalization, the authors propose a variety of schemes that have already proved their effectiveness in countries such as Mexico, Turkey, Brazil, Colombia, Nicaragua and Honduras Nuevos acuerdos regionales de comercio en Latinoamérica y disposición a negociar: el caso de la agricultura Resumen Este artÃculo analiza las tendencias del comercio agrario y el proteccionismo de la agricultura en Latinoamérica, examinando los cambios observados en la agricultura y la polÃtica comercial en los últimos 20 años, denominados por los autores como "nuevos acuerdos regionales de comercio". También se discuten el conflicto de intereses y las variadas posiciones comerciales desarrolladas por los distintos paÃses de América Latina, como resultado de una fuerte heterogeneidad entre los exportadores y los importadores agrarios netos. Los autores muestran que los reiterados fallos de las negociaciones comerciales de la ronda Doha abrieron las puertas para acuerdos comerciales libres bilaterales o sub-regionales, concluyendo con la predicción de que la integración regional traerá como resultado un acuerdo entre varios bloques de comercio sub-regionales. La debilidad de la demanda interna hace que el desarrollo del sector agroalimentario dependa fuertemente de las exportaciones, especialmente de los exportadores netos. En la dirección de los resultados de la distribución de beneficios de los acuerdos de liberalización, los autores proponen una variedad de esquemas que han tenido su efectividad en paÃses como México, TurquÃa, Brasil, Colombia, Nicaragua y Honduras. Palabras clave: acuerdos libre de comercio, nuevos acuerdos regionales de comercio y agricultura.Free Trade Agreements, New Open Regionalism and Agriculture, International Relations/Trade, Q17,
Collinsville solar thermal project: yield forecasting (final report)
Executive Summary
1 Introduction
This report’s primary aim is to provide yield projections for the proposed Linear Fresnel Reflector (LFR) technology plant at Collinsville, Queensland, Australia. However, the techniques developed in this report to overcome inadequate datasets at Collinsville to produce the yield projections are of interest to a wider audience because inadequate datasets for renewable energy projects are commonplace. Our subsequent report called ‘Energy economics and dispatch forecasting’ (Bell, Wild & Foster 2014a) uses the yield projections from this report to produce long-term wholesale market price and dispatch forecasts for the plant.
2 Literature review
The literature review discusses the four drivers for yield for LFR technology:
DNI (Direct Normal Irradiance)
Temperature
Humidity
Pressure
Collinsville lacks complete historical datasets of the four drivers to develop yield projections but its three nearby neighbours possess complete datasets, so could act as proxies for Collinsville. However, analysing the four drivers for Collinsville and its three nearby sites shows that there is considerable difference in their climates. This difference makes them unsuitable to act as proxies for yield calculations. Therefore, the review investigates modelling the four drivers for Collinsville.
We introduce the term “effective” DNI to help clarify and ameliorate concerns over the dust and dew effects on terrestrial DNI measurement and LFR technology.
We also introduce a modified Typical Metrological Year (TMY) technique to overcome technology specific TMYs. We discuss the effect of climate change and the El Niño Southern Oscillation (ENSO) on yield and their implications for a TMY.
2.1 Research questions
Research questions arising from the literature review include:
The overarching research question:
Can modelling the weather with limited datasets produce greater yield predictive power than using the historically more complete datasets from nearby sites?
This overarching question has a number of smaller supporting research questions:
Does BoM adequately adjust its DNI satellite dataset for cloud cover at Collinsville?
Given the dust and dew effects, is using raw satellite data sufficient to model yield?
Does elevation between Collinsville and nearby sites affect yield?
How does the ENSO cycle affect yield?
Given the 2007-12 electricity demand data constraint, will the 2007-13 based TMY provide a “Typical” year over the ENSO cycle?
How does climate change affect yield?
Is the method to use raw satellite DNI data to calculate yield and retrospectively adjusting the calculated yield with an effective to satellite DNI energy per area ratio suitable?
How has climate change affected the ENSO cycle?
A further research question arises in the methodology but is included here for completeness.
What is the expected frequency of oversupply from the Linear Fresnel Novatec Solar Boiler?
3 Methodology
In the methodology section, we discuss the data preparation and the model selection process for the four drivers of yield. We also discuss the development of the technology specific TMY and sensitivity analysis to address the research questions on climate change and elevation.
4 Results and analysis
In the results section we present the selection process for the four driver models. We also present the effective to satellite DNI ratio, the annual variation in gross yield, the selection of TMMs for the TMY based on monthly yield, the sensitivity analysis results on climate change and elevation, and the frequency of gross yield exceeding 30 MW.
5 Discussion
We analyse the results within a wider context, in particular, we make a comparison with the yield calculations for Rockhampton to address the overarching research question. We find that the modelling of weather at Collinsville using incomplete weather data has higher predictive performance that using the complete weather data at Rockhampton but recommend using the BoM’s one-minute solar data to improve the comparative test. Other findings include the requirement to increase the current TMM’s selection period 2007-13 to incorporate more of the ENSO cycle. There is less than 0.3% change in gross yield from the plant in the most likely case of climate change but there is a requirement to determine the effect of climate change on electricity demand and the ensuing change in wholesale electricity prices.
6 Conclusion
In this report, we have addressed the key research questions, produced the yield projections for our subsequent report ‘Energy economics and dispatch forecasting’ (Bell, Wild & Foster 2014a) and made recommendations for further research
Collinsville solar thermal project: energy economics and dispatch forecasting (final report)
The primary aim of this report is to help negotiate a Power Purchase Agreement (PPA) for the proposed hybrid gas-Linear Frensel Reflector (LFR) plant at Collinsville, Queensland, Australia. The report’s wider appeal is the discussion of the current situation in Australian National Electricity Market (NEM) and techniques and methods used to model the NEM’s demand and wholesale spot prices for the lifetime of the proposed plant.
Executive Summary
1 Introduction
This report primarily aims to provide both dispatch and wholesale spot price forecasts for the proposed hybrid gas-solar thermal plant at Collinsville, Queensland, Australia for its lifetime 2017-47. These forecasts are to facilitate Power Purchase Agreement (PPA) negotiations and to evaluate the proposed dispatch profile in Table 3. The solar thermal component of the plant uses Linear Fresnel Reflector (LFR) technology. The proposed profile maintains a 30 MW dispatch during the weekdays by topping up the yield from the LFR by dispatch from the gas generator and imitates a baseload function currently provided by coal generators. This report is the second of two reports and uses the findings of our first report on yield forecasting (Bell, Wild & Foster 2014b).
2 Literature review
The literature review discusses demand and supply forecasts, which we use to forecast wholesale spot prices with the Australian National Electricity Market (ANEM) model.
The review introduces the concept of gross demand to supplement the Australian Electricity Market Operator’s (AEMO) “total demand”. This gross demand concept helps to explain the permanent transformation of the demand in the National Electricity Market (NEM) region and the recent demand over forecasting by the AEMO. We also discuss factors causing the permanent transformation. The review also discusses the implications of the irregular ENSO cycle for demand and its role in over forecasting demand.
Forecasting supply requires assimilating the information in the Electricity Statement of Opportunities (ESO) (AEMO 2013a, 2014c). AEMO expects a reserve surplus across the NEM beyond 2023-24. Compounding this reserve surplus, there is a continuing decline in manufacturing, which is freeing up supply capacity elsewhere in the NEM. The combined effect of export LNG prices and declining total demand are hampering decisions to transform proposed gas generation investment into actual investment and hampering the role for gas as a bridging technology in the NEM. The review also estimates expected lower and upper bounds for domestic gas prices to determine the sensitivity of the NEM’s wholesale spot prices and plant’s revenue to gas prices.
The largest proposed investment in the NEM is from wind generation but the low demand to wind speed correlation induces wholesale spot price volatility. However, McKinsey Global Institute (MGI 2014) and Norris et al. (2014a) expect economically viable energy storage shortly beyond the planning horizon of the ESO in 2023-24. We expect that this viability will not only defer investment in generation and transmission but also accelerate the growth in off-market produced and consumed electricity within the NEM region.
2.1 Research questions
The report has the following overarching research questions:
What is the expected dispatch of the proposed plant’s gas component given the plant’s dispatch profile and expected LFR yield?
What are the wholesale spots prices on the NEM given the plant’s dispatch profile?
The literature review refines the latter research question into five more specific research questions ready for the methodology:
What are the half-hourly wholesale spots prices for the plant’s lifetime without gas as a bridging technology?
Assuming a reference gas price of between 7.19/GJ for base-load gas generation (depending upon nodal location;) and
for peak-load gas generation of between 8.99/GJ; and
given the plant’s dispatch profile
What are the half-hourly wholesale spots prices for the plant’s lifetime with gas as a bridging technology?
Assuming some replacement of coal with gas generation
How sensitive are wholesale spot prices to higher gas prices?
Assuming high gas prices are between 9.71/GJ for base-load gas generation (depending upon nodal location); and
for peak-load gas generation of between 12.14/GJ; and
What is the plant’s revenue for the reference gas prices?
How sensitive is the plant’s revenue to gas as a bridging technology?
How sensitive is the plant’s revenue to the higher gas prices?
What is the levelised cost of energy for the proposed plant?
3 Methodology
In the methodology section, we discuss the following items:
dispatch forecasting for the proposed plant;
supply capacity for the years 2014-47 for the NEM;
demand forecasting using a Typical Meteorological Year (TMY); and
wholesale spot prices calculation using ANEM, supply capacity and total demand
define three scenarios to address the research questions:
reference gas prices;
gas as a bridging technology; and
high gas prices.
The TMY demand matches the solar thermal plant’s TMY yield forecast that we developed in our previous report (Bell, Wild & Foster 2014b). Together, these forecasts help address the research questions.
4 Results
In the results section we will present the findings for each research question, including
the TMY yield for the LFR and the dispatch of the gas generator given the proposed dispatch profile in Table 3;
Average annual wholesale spot prices from 2017 to 2047 for the plant’s node for:
Reference gas prices scenario from 38/MWh
Gas as a bridging technology scenario from 110/MWh
High gas price scenario from 41/MWh
The combined plants revenue without subsidy given the proposed profile:
Reference gas price scenario 52 million
High gas price scenario $47 million
5 Discussion
In the discussion section, we analyse:
reasons for the changes in the average annual spot prices for the three scenarios; and
the frequency that the half-hourly spot price exceeds the Short Run Marginal Cost (SRMC) of the gas generator for the three scenarios for:
day of the week;
month of the year; and
time of the day.
If the wholesale spot price exceeds the SRMC, dispatch from the gas plant contributes towards profits. Otherwise, the dispatch contributes towards a loss. We find that for both reference and high gas price scenarios the proposed profile in Table 3 captures exceedances for the day of the week and the time of the day but causes the plant to run at a loss for several months of the year. Figure 14 shows that the proposed profile captures the exceedance by hour of the day and Figure 16 shows that only operating the gas component Monday to Friday is well justified. However, Figure 15 shows that operating the gas plant in April, May, September and October is contributing toward a loss. Months either side of these four months have a marginal number of exceedances. In the unlikely case of gas as a bridging scenario, extending the proposed profile to include the weekend and operating from 6 am to midnight would contribute to profits.
We offer an alternative strategy to the proposed profile because the proposed profile in the most likely scenarios proves loss making when considering the gas component’s operation throughout the year. The gas-LFR plant imitating the based-load role of a coal generator takes advantage of the strengths of the gas and LFR component, that is, the flexibility of gas to compensate for the LFR’s intermittency, and utilising the LFR’s low SRMC. However, the high SRMC of the gas component in a baseload role loses the flexibility to respond to market conditions and contributes to loss instead of profit and to CO2 production during periods of low demand.
The alternative profile retains the advantages of the proposed profile but allows the gas component freedom to exploit market conditions. Figure 17 introduces the perfect day’s yield profile calculated from the maximum hourly yield from the years 2007-13. The gas generator tops up the actual LFR yield to the perfect day’s yield profile to cover LFR intermittency. The residual capacity of the gas generator is free to meet demand when spot market prices exceed SRMC and price spikes during Value-of-Lost-Load (VOLL) events. The flexibility of the gas component may prove more advantageous as the penetration of intermittent renewable energy increases.
6 Conclusion
We find that the proposed plant is a useful addition to the NEM but the proposed profile is unsuitable because the gas component is loss making for four months of the year and producing CO2 during periods of low demand. We recommend further research using the alternative perfect day’s yield profile.
7 Further Research
We discuss further research compiled from recommendation elsewhere in the report.
8 Appendix A Australian National Electricity Market Model Network
This appendix provides diagrams of the generation and load serving entity nodes and the transmission lines that the ANEM model uses. There are 52 nodes and 68 transmission lines, which make the ANEM model realistic. In comparison, many other models of the NEM are highly aggregated.
9 Appendix B Australian National Electricity Market Model
This appendix describes the ANEM model in detail and provides additional information on the assumptions made about the change in the generation fleet in the NEM during the lifetime of the proposed plant
Collinsville solar thermal project: yield forecasting (draft report)
The final report has been published and is available here.
Executive Summary
1 Introduction
This report’s primary aim is to provide yield projections for the proposed Linear Fresnel Reflector (LFR) technology plant at Collinsville, Queensland, Australia. However, the techniques developed in this report to overcome inadequate datasets at Collinsville to produce the yield projections are of interest to a wider audience because inadequate datasets for renewable energy projects are commonplace. The subsequent report called ‘Energy economics and dispatch forecasting’ (Bell, Wild & Foster 2014a) uses the yield projections from this report to produce long-term wholesale market price and dispatch forecasts for the plant.
2 Literature review
The literature review discusses the four drivers for yield for LFR technology:
DNI (Direct Normal Irradiance)
Temperature
Humidity
Pressure
Collinsville lacks complete historical datasets of the four drivers to develop yield projects but its three nearby neighbours do possess complete datasets, so could act as proxies for Collinsville. However, analysing the four drivers for Collinsville and its three nearby sites shows that there is considerable difference in their climates. This difference makes them unsuitable to act as proxies for yield calculations. Therefore, the review investigates modelling the four drivers for Collinsville.
We introduce the term “effective” DNI to help clarify and ameliorate concerns over the dust and dew effects on terrestrial DNI measurement and LFR technology.
We also introduce a modified TMY technique to overcome technology specific Typical Metrological Year (TMY). We discuss the effect of climate change and the El Nino Southern Oscillation (ENSO) on yield and their implications for a TMY.
2.1 Research questions
Research question arising from the literature review include:
The overarching research question:
Can modelling the weather with limited datasets produce greater yield predictive power than using the historically more complete datasets from nearby sites?
This overarching question has a number of smaller supporting research questions:
Is BoM’s DNI satellite dataset adequately adjusted for cloud cover at Collinsville?
Given the dust and dew effects, is using raw satellite data sufficient to model yield?
Does elevation between Collinsville and nearby sites affect yield?
How does the ENSO affect yield?
Given the 2007-2012 constraint, will the TMY process provide a “Typical” year over the ENSO cycle?
How does climate change affect yield?
A further research question arises in the methodology but is included here for completeness.
What is the expected frequency of oversupply from the Linear Fresnel Novatec Solar Boiler?
3 Methodology
In the methodology section, we discuss the data preparation and the model selection process for the four drivers of yield.
4 Results and analysis
In the results section we present the four driver models selected and the process that was undertaken to arrive at the models.
5 Discussion
We analyse the extent to which the research questions are informed by the results.
6 Conclusion
In this report, we have identified the key research questions and established a methodology to address these questions. The models for the four drivers have been established allowing the calculation of the yield projections for Collinsville
Case study Guatemalan raspberries and cyclospora
"The Guatemalan raspberry industry began exporting to the United States in the late 1980s, filling a market niche in the spring and fall when supplies were low. By 1996, Guatemalan raspberry exports were increasing rapidly, up 113 percent from the previous season. That spring and early summer, the U.S. Centers for Disease Control and Prevention (CDC) and Health Canada received reports of more than 1,465 cases of food-borne illness from Cyclospora, a protozoan parasite. Although no one died, the large number of cases generated substantial adverse publicity. Initially, investigators linked the outbreak to California strawberries, but they finally decided that it was associated with Guatemalan raspberries. This case study reviews the efforts to resolve this food safety problem. It is a cautionary tale about the serious impact a food safety outbreak can have on a promising industry. " from TextFood safety ,food security ,Public health ,
COMMODITY POLICY, PRICE INCENTIVES, AND THE GROWTH IN PER-ACRE YIELDS
We estimate the influence of policy-induced price changes and of technology supply on North Carolina flue-cured tobacco yields. The decline in land rent and effective output price that accompanied a 1965 policy change from acreage allotments to poundage quotas caused a 12 percent decrease in yields. Farmer yields were more responsive to yield-increasing technologies under acreage allotments than under poundage quotas. Annual yield growth was 0.5 percent under poundage quotas and 4.32 percent under acreage allotments. The growth rate decline is attributable to changes in relative prices and to a slowdown in the supply of available technologies.Commodity policy, Endogenous yield growth, Flue-cured tobacco, Technical change, Agricultural and Food Policy, Demand and Price Analysis, Research and Development/Tech Change/Emerging Technologies,
- …