price variability
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Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6989
Author(s):  
Andrés Oviedo-Gómez ◽  
Sandra Milena Londoño-Hernández ◽  
Diego Fernando Manotas-Duque

COVID-19 disease shocked global economic activity and affected the electricity markets due to lockdown and work-from-home policies. Therefore, this study proposes an empirical analysis to identify the electricity spot price response during the preventive and mandatory insulation in Colombia, where the economic contraction caused the largest decrease in the electricity demand, especially in the industrial sector. The methodology applied was quantile regression to quantify the non-linear effect on the spot price returns, and two sample periods were selected to contrast the results: 2018 and 2019. The main findings showed that regulated demand variation caused the highest variability on the spot price dynamic during the strict quarantine. However, the price could not fully capture the effects of the demand change due to the short duration of the shock and, also, the price variability in 2019 was higher than 2020 by an El Niño shock.


2021 ◽  
Vol 23 (2) ◽  
pp. 43-46
Author(s):  
Thomas J. Beck

Revolution and Protest Online is an Alexander Street resource, which provides documents, images and videos on revolutions and resistance, protest, and social movements from the eighteenth to the twenty-first centuries. It can be purchased as a standalone collection with a perpetual access license, or it can be accessed as a Related Collection through a subscription to Global Issues Library, another Alexander Street resource. This database contains original documents and images in PDF format, as well as e-books, monographs, journals, and videos. These are drawn from a variety of national and international sources, and collectively represent several hundred images, almost 200 videos, and nearly 100,000 pages of content.This database is not difficult to navigate, and finding materials there is relatively easy, using either the basic or advanced searches or through browsing. These various search and browse functions can produce useful results, and are easily understandable, though the advanced search is arguably the most flexible and effective (but also the most complex!). Pricing for this database is based on an institution's budget, FTE, and whatever consortia arrangements it and other institutions make with the vendor. As a consequence, its price can vary considerably from one subscriber to another! For a specific price quote, contact Alexander Street. Its licensing agreement is quite average in its length and composition and is apparently the standard one for the vendor. The quality, quantity, and variety of materials in this database is notable. It will certainly be of use to those researching the political, historical, and social aspects of revolution and protest, both in the United States and around the world. However, given its price variability, it may only be of marginal value to institutions with a high purchase/subscription price and a low demand for these kinds of materials.


The study was conducted on the spatial analysis of paddy rice (Oryza sativa) price variability in Dass and Tafawa Balewa LGAs of Bauchi State, Nigeria. Data were collected using questionnaires administered to 120 respondents sampled through random sampling technique. Secondary data were also collected from BSADP Bauchi on monthly prices of paddy rice. Data were analyzed using descriptive statistics (mean, frequency, ranking and likert scale), pearson product correlation, T-test and ratio to moving average model. It was revealed that the leading causes of spatial rice price variability were spatial variation in supply, high cost of transportation and inadequate market information. There was existence of price integration or perfect price transmission between and among the urban and rural markets during the period of study. The magnitude of paddy rice price variability in the rural markets were higher, and the t-test shows that there was a significant (P < 0.05) difference in price of paddy rice between rural and urban markets. Spatial variation in supply, bad road condition, seasonal variation in supply, inadequate contact with extension agents and low capital outlay were the major constraints militating against paddy rice marketing in the study area. Therefore, it is recommended that Rural feeder roads should be constructed by government, NGOs or individuals to enable easy movement of produce as well as all year round production/supply of rice should be encouraged through provision of fund and inputs by relevant stakeholders to farmers for dry season farming in order to curtail the problem of price variation due to seasonality in production.


2021 ◽  
Vol 10 (2) ◽  
pp. 107-120
Author(s):  
Muhammad Firdaus

This study aims to compare the variability and convergence of strategic food prices before and during the COVID-19 pandemic in Indonesia. The weekly prices data of 9 food commodities in 34 provinces during 2019 and 2020 was used. The price variability and convergence are analyzed using the coefficient of variation and dynamic data panel, respectively. The result showed that the rice, beef, red chilies, chicken meat, and chicken eggs experienced a decrease in price variability while sugar, shallots, garlic, and cayenne pepper exhibited the opposite. Prices movement among regions tends to show increasing price variability, with the exception of chicken eggs. Some efforts such as supply management through structuring production over time, efficiency of distribution between regions is imperative to stabilize food prices. Besides, efforts such as a market contract system, warehouse receipt systems and strengthening Local Government-Owned Enterprise for food supply management are crucial.Keywords: horticulture; convergence; dynamic panel data; variability AbstrakPenelitian ini bertujuan untuk membandingkan variabilitas dan konvergensi harga pangan strategis sebelum dan selama pandemi COVID-19 di Indonesia. Data yang digunakan adalah harga mingguan 9 komoditas pangan di 34 provinsi selama 2019 dan 2020. Variabilitas dan konvergensi harga dianalisis menggunakan koefisien variasi dan data panel dinamis. Hasil penelitian menunjukkan bahwa beras, daging sapi, cabai merah, daging ayam, dan telur ayam mengalami penurunan variabilitas harga, sedangkan gula, bawang merah,bawang putih, dan cabai rawit mengalami sebaliknya. Pergerakan harga antar wilayah menunjukkan variabilitas harga yang cenderung meningkat, kecuali harga telur ayam. Beberapa hal yang dapat dilakukan untuk menstabilkan harga pangan adalah manajemen pasokan melalui penataan produksi antar waktu dan efisiensi distribusi antar daerah. Selain itu, sistem kontrak pemasaran, sistem resi gudang, dan penguatan Badan Usaha Milik Daerah untuk pengelolaan pasokan makanan sangatlah penting.


2021 ◽  
Vol 23 (1) ◽  
pp. 13-15
Author(s):  
Thomas J. Beck

Education Source is an EBSCO database. It offers the user access to thousands of full-text journals and conference papers, millions of citations, thousands of abstracts, and hundreds of videos. These various print and media resources cover a wide variety of educational topics, including educational policy, pedagogy, communication and information in education, educational grants, and education economics, among many others.This database can be viewed in one of 32 languages. Documents can be found here using either a basic or advanced search, both of which are easily understandable and useable. Although the two searches have their own strengths and weaknesses, both can produce useful results. Pricing for this resource is determined by FTE, consortium agreements/buying groups, other EBSCO database subscriptions, and a variety of other factors. All of these can lead to considerable price variability. The licensing agreement for this database is the same as for all EBSCO resources, and its composition is standard and unre-markable (though it is a bit long, at nine pages). Content quality and quantity in this database is excellent and will certainly be of use to those researching education and related topics. However, its primary audience will be students and faculty in colleges and universities, and most probably only those with education programs, schools, or departments. It will be of only secondary use to others, and possibly too expensive for them.


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