scholarly journals Topics of Wholesale Market in Jakarta.

1996 ◽  
Vol 22 (4) ◽  
pp. 249-250
Author(s):  
Kazuhiro ABE
Keyword(s):  
Wholesale Market

Food Safety and the Adoption of Traceability: Evidence from a Wholesale Market Field Survey in China

2019 ◽  
Author(s):  
Cangyu Jin ◽  
Retsef Levi ◽  
Qiao Liang ◽  
Nicholas Renegar ◽  
Jiehong Zhou
Keyword(s):  
Food Safety ◽  
Field Survey ◽  
Wholesale Market

Market Power in the New Zealand electricity wholesale market 2010–2016

2020 ◽  
pp. 105078
Author(s):  
Stephen Poletti
Keyword(s):  
New Zealand ◽  
Market Power ◽  
Wholesale Market

Measuring Market Power in Bilateral Oligopoly: The Wholesale Market for Beef

2000 ◽  
Vol 66 (3) ◽  
pp. 526-547
Author(s):  
John R. Schroeter ◽  
Azzeddine M. Azzam ◽  
Mingxia Zhang
Keyword(s):  
Market Power ◽  
Wholesale Market

scholarly journals Prosumer Community Portfolio Optimization via Aggregator: The Case of the Iberian Electricity Market and Portuguese Retail Market

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3747
Author(s):  
Ricardo Faia ◽  
Tiago Pinto ◽  
Zita Vale ◽  
Juan Manuel Corchado
Keyword(s):  
Portfolio Optimization ◽  
Electricity Markets ◽  
Electricity Market ◽  
Retail Market ◽  
Wholesale Market ◽  
Generation Capacity ◽  
Wholesale Electricity Market ◽  
Portfolio Optimization Model ◽  
Photovoltaic Generators

The participation of household prosumers in wholesale electricity markets is very limited, considering the minimum participation limit imposed by most market participation rules. The generation capacity of households has been increasing since the installation of distributed generation from renewable sources in their facilities brings advantages for themselves and the system. Due to the growth of self-consumption, network operators have been putting aside the purchase of electricity from households, and there has been a reduction in the price of these transactions. This paper proposes an innovative model that uses the aggregation of households to reach the minimum limits of electricity volume needed to participate in the wholesale market. In this way, the Aggregator represents the community of households in market sales and purchases. An electricity transactions portfolio optimization model is proposed to enable the Aggregator reaching the decisions on which markets to participate to maximize the market negotiation outcomes, considering the day-ahead market, intra-day market, and retail market. A case study is presented, considering the Iberian wholesale electricity market and the Portuguese retail market. A community of 50 prosumers equipped with photovoltaic generators and individual storage systems is used to carry out the experiments. A cost reduction of 6–11% is achieved when the community of households buys and sells electricity in the wholesale market through the Aggregator.

A hybrid robust-stochastic approach for strategic scheduling of a multi-energy system as a price-maker player in day-ahead wholesale market

Energy ◽  
2021 ◽  
pp. 121398
Author(s):  
Nima Nasiri ◽  
Saeed Zeynali ◽  
Sajad Najafi Ravadanegh ◽  
Mousa Marzband
Keyword(s):  
Stochastic Approach ◽  
Energy System ◽  
Wholesale Market

scholarly journals A Novel Integrated Profit Maximization Model for Retailers under Varied Penetration Levels of Photovoltaic Systems

Energies ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 92
Author(s):  
Ioannis P. Panapakidis ◽  
Nikolaos Koltsaklis ◽  
Georgios C. Christoforidis
Keyword(s):  
Profit Maximization ◽  
Energy Markets ◽  
Maximization Problem ◽  
Selling Price ◽  
Retail Market ◽  
Stochastic Variable ◽  
Wholesale Market ◽  
Market Operation ◽  
Pv Penetration ◽  
Marginal Price

In contemporary energy markets, the Retailer acts as the intermediate between the generation and demand sectors. The scope of the Retailer is to maximize its profits by selecting the appropriate procurement mechanism and selling price to the consumers. The wholesale market operation influences the profits since the mix of generation plants determines the system marginal price (SMP). In the related literature, the SMP is treated as a stochastic variable, and the wholesale market conditions are not taken into account. The present paper presents a novel methodology that aims at connecting the wholesale and retail market operations from a Retailer’s perspective. A wholesale market clearing problem is formulated and solved. The scope is to examine how different photovoltaics (PV) penetration levels in the generation side influences the profits of the Retailer and the selling prices to the consumers. The resulting SMPs are used as inputs in a retailer profit maximization problem. This approach allows the Retailer to minimize economic risks and maximize profits. The results indicate that different PV implementation levels on the generation side highly influences the profits and the selling prices.

scholarly journals From hierarchies to markets and partially back again in electricity: responding to decarbonization and security of supply goals

2021 ◽  
pp. 1-17
Author(s):  
Paul L. Joskow
Keyword(s):  
Market Integration ◽  
Investment Incentives ◽  
Wholesale Market ◽  
Security Of Supply ◽  
Short Term ◽  
Institutional Adaptation ◽  
The World ◽  
New Challenges ◽  
And Storage

Abstract Electric power sectors around the world have changed dramatically in the last 25 years as a result of sector liberalization policies. Many electricity sectors are now pursuing deep decarbonization goals which will entail replacing dispatchable fossil generation primarily with intermittent renewable generation (wind and solar) over the next 20–30 years. This transition creates new challenges for both short-term wholesale market design and investment incentives consistent with achieving both decarbonization commitments and security of supply criteria. Thinking broadly about the options for institutional change from a Williamsonian perspective – thinking like Williamson – provides a useful framework for examining institutional adaptation. Hybrid markets that combine ‘competition for the market’ that relies on competitive procurement for long-term purchased power agreements with wind, solar, and storage developers, ideally in a technology neutral fashion, and ‘competition in the market’ that relies on short-term markets designed to produce efficient and reliable operations of intermittent generation and storage, is identified as a promising direction for institutional adaptation. Many auction, contract, and market integration issues remain to be resolved.

The open-access telecommunication transmission network in the Canary Islands: an alternative proposal to the current management model?

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Eduardo Krawietz Ramos ◽  
Rosa María Aguilar Chinea ◽  
Pedro Juan Baquero Pérez
Keyword(s):  
Open Access ◽  
Canary Islands ◽  
Service Providers ◽  
Management Model ◽  
Transmission Network ◽  
Wholesale Market ◽  
Content Type ◽  
Regulatory Policies ◽  
Retail Service ◽  
Alternative Proposal

Purpose This paper aims to study the competition problems and market failures in the Canary Islands and propose an alternative management model for the telecommunication transmission network. This model is based on a wholesale-only open-access transmission network, available to all the retail service providers of this region, and managed by a unique entity subject to regulation with cost-based prices. The proposal hopefully will help to debate about the implementation of certain regulatory models in the network industries, concerning telecommunication submarine cables connecting archipelagos. Design/methodology/approach An empirical approach has been used, based on the observation and analysis of the regulatory policies applied to the wholesale transmission networks in the Canary Islands, Azores and Madeira archipelagos. Findings Results show a persistent margin squeeze situation on the retail broadband market in the Canary Islands, due to the pricing strategy on the Spanish mainland-Canaries wholesale market, which is, in turn, delaying the entry of alternatives and the level of development and efficiency of competition. The risk of duopoly collusion is also present on this wholesale market. Additionally, public aids will be needed to replace the systems connecting with the non-capital islands and to provide redundancy to El Hierro. The alternative proposal might help preventing the above. Eventually, several insights are considered for further investigation. Originality/value Little attention has been paid to this topic in the literature, regarding the analysis of regulatory policies applied over fiber optic submarine cable infrastructures in fragmented territories like archipelagos. Consequently, an empirical analysis has been accomplished to emphasize this research work, based on the regulatory policies adopted.

Antibiotic-Resistant Bacteria and Antibiotic Residue Contamination in Fresh Raw Foods Sold at Wholesale Markets in Thailand

2021 ◽  
Vol 104 (4) ◽  
pp. 654-662
Keyword(s):  
Bacterial Infection ◽  
Food Samples ◽  
Resistant Bacteria ◽  
Antibiotic Residues ◽  
Wholesale Market ◽  
Antibiotic Resistant Bacteria ◽  
Thai Population ◽  
Antibiotic Resistant ◽  
Raw Foods ◽  
Antibiotic Residue

Objective: To investigate the extent of antibiotic-resistant bacteria and antibiotic residue contamination in fresh raw foods sold at wholesale markets in Thailand, which may be the important drivers of antibiotic-resistant bacteria colonization and antibiotic-resistant bacterial infection in Thai population. Materials and Methods: Fresh raw foods, including food from animal products, seafoods, vegetables, fruits, and honey were purchased from two large wholesale markets in Thailand. Food samples were cultured for antibiotic-resistant bacteria and tested for the presence and amount of antibiotic residue. Results: Among 521 samples for bacterial culture, 86.9% grew at least one kind of bacteria. Enterobacteriaceae were commonly isolated and were commonly resistant to ampicillin (76.7% to 100%). ESBL-producers and ceftriaxone-resistant Enterobacteriaceae were prevalent in swine and duck samples (56.7% to 91.7%). Some isolates were resistant to co-amoxiclav (13.3% to 60.0%) and cefoxitin (5.0% to 30.0%). Colistin-resistant Enterobacteriaceae were observed in pork meat (1.4%) and chicken offal (7.0%). Ertapenem-resistant Enterobacteriaceae were detected in cha-om (26.7%). Among 501 samples for antibiotic residue testing, 37.1% contained at least one antibiotic residue. Enrofloxacin was the most prevalent antibiotic residue, followed by doxycycline and tilmicosin. Although most samples contained less antibiotics than the maximum residue limit (MRL), 7.0% contained an amount of at least one antibiotic above the MRL. Conclusion: Many fresh raw foods sold at wholesale markets in Thailand were contaminated with antibiotic-resistant bacteria, and some contained antibiotic residues. Therefore, Thai people are at risk of being colonized with antibiotic-resistant bacteria and developing antibiotic-resistant bacterial infection due to consuming foods contaminated with antibiotic-resistant bacteria or containing antibiotic residues. Keywords: antibiotic-resistant bacteria, antibiotic residue, fresh raw foods, wholesale market, Thailand

Kajian Pengelolaan Biokonversi Sampah Organik melalui Budidaya Maggot Black Soldier Fly (Studi Kasus: PKPS Medan)

2021 ◽  
Vol 6 (4) ◽  
Author(s):  
Restu Auliani ◽  
Bella Elsaday ◽  
Desy Ari Apsari ◽  
Helfi Nolia
Keyword(s):  
Waste Management ◽  
Organic Waste ◽  
Animal Feed ◽  
Wholesale Market ◽  
Black Soldier Fly ◽  
Study Approach ◽  
Interview Method ◽  
Regulatory Aspect ◽  
Feed Protein ◽  
Market Trader

The cultivation of maggot Black Soldier Fly (BSF) is a bioconversion technology of organic matter that can be one solution to the problem of organic waste. This study aims to examine aspects of organic waste management through BSF Medan maggot cultivation, including operational technical, financing, institutional, regulatory and community and government participation aspects. This research is a descriptive observational study with an exploratory study approach using the interview method. Descriptive and quantitative data processing and analysis. Based on operational technical aspects, maggot cultivation has succeeded in converting organic waste into a source of animal feed protein and reducing the amount of organic waste. The amount of organic waste that is managed is 90kg/day with an effectiveness of 0.013% the total domestic waste in Medan. The financing and institutional aspects of waste management are managed in an organized manner through a cooperative body, namely the Primary Waste Management Cooperative (PKPS) Medan. The regulatory aspect that is used as reference is Medan Mayor Regulation No. 26 of 2019. Aspects of community participation directly from members of the cooperative and the Laucih wholesale market trader in Medan City. This bioconversion technology is able to overcome the problem of waste in an effort to reduce organic waste.

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