Lawful Sequence of Events and Cryptocurrency Anomalies: An Empirical Investigation

2021 ◽  
pp. 231971452110424
Author(s):  
Parul Bhatia ◽  
Lipika Jain
Keyword(s):  
Financial Markets ◽  
Empirical Investigation ◽  
Structural Variations ◽  
Legal Tender ◽  
Sequence Of Events ◽  
Time Period ◽  
World Markets ◽  
Varied Response ◽  
Day Of The Week ◽  
One Way Anova

The structural variations related to legal tender of cryptocurrencies operating across the world markets has been instable since their inception. There have been many changes incorporated for their status to be recognized as a legal financial instrument for investment purposes over the virtual financial markets. The concept of anomalies associated with the popular efficient market hypotheses given by Eugene Fama existed for Bitcoin and few other cryptocurrencies over a period of time. The present work attempts to contribute to the existing literature on cryptocurrency studies. A focused investigation has been carried for cryptocurrencies to find different behaviour of returns on these currencies over a varied response from various countries with respect to their permissible manoeuvres. The study has used independent sample t-test, one-way ANOVA and dummy regression analysis to examine the day of the week effect for a time period between 2014–2020 split into multiple sub-periods. Anomalies have been found for cryptocurrencies across multiple sub-periods with varied magnitude.

scholarly journals The impact of the financial crisis on earnings management: Empirical evidence from Italian and Spanish listed companies

2019 ◽  
Vol 16 (2) ◽  
pp. 121-130 ◽  
Author(s):  
Francesco De Luca ◽  
Francesco Paolone
Keyword(s):  
Financial Crisis ◽  
Financial Markets ◽  
Performance Indicators ◽  
Listed Companies ◽  
Publicly Traded ◽  
Publicly Traded Companies ◽  
Time Period ◽  
Security Offerings ◽  
The Impact ◽  
Giving Bad News

Our study adopts a reliable and widely acknowledged model to detect accounts manipulation in order to assess the impact of the financial crisis on Italian and Spanish listed companies’ propensity to manage their earnings. The analysis is conducted on 565 publicly traded companies on the Italian and Spanish financial markets during the time period 2005-2013. We find a lower propensity to manipulate earnings in both countries during the pre-crisis period (2005-2008) as suggested by a decrease in the number of high-risk manipulators until 2008 included. With the spread of the financial crisis, companies become more manipulators. We believe that the reason for this is to avoid giving bad news to markets, investors, and lenders after that the crisis may have impacted too negatively on firms’ performance indicators and financial equilibrium. Our empirical results provide various implications for further studies related to managements’ incentives concurrently with security offerings.

Exploring Fieldwork Effects in a Mobile CATI Survey

2017 ◽  
Vol 59 (1) ◽  
pp. 57-76
Author(s):  
Paula Vicente
Keyword(s):  
Mobile Phone ◽  
Future Research ◽  
Computer Assisted ◽  
Contact Rates ◽  
Time Period ◽  
Sample Composition ◽  
Interview Survey ◽  
Day Of The Week ◽  
Time Periods ◽  
Cati Survey

This study explores the effects of call attempts and time periods on call outcomes and sample composition. A mobile computer-assisted telephone interview survey was conducted to collect data from adult mobile phone users about use and attitudes towards mobile phones; paradata regarding call dispositions, time and day of the week of calls and number of call attempts was also available. The first call contact rate was approximately 27% and varied significantly across time periods; the rate fell to below 20% for the second call. Weekend time periods yielded higher contact rates than weekday time periods. The interview rate on the first call was 12% and decreased steadily in subsequent calls. Mobile phone numbers that yielded call rejection, voicemail or were busy on the first call were very difficult to convert into interview on the second call. The number of call attempts and time period of the calls affect sample composition, namely in relation to respondents' age, educational level and area of residence. Future research and practical implications of the findings for mobile CATI surveys are discussed.

Campus sexual assault and student activism, 1970–1990

2019 ◽  
Vol 19 (4) ◽  
pp. 564-579
Author(s):  
Molly C Driessen
Keyword(s):  
Sexual Violence ◽  
Historical Analysis ◽  
Student Activism ◽  
Primary Sources ◽  
Campus Sexual Assault ◽  
Secondary Sources ◽  
Time Period ◽  
The Us ◽  
History Of ◽  
Varied Response

This historical analysis research project traces the early history of the anti-rape movement within the US by examining one university’s development of a sexual violence resource center and the role of student activism. The time period between the 1970s through the 1990s was selected for this analysis due to the significant development of legislation, research, and activism surrounding sexual violence on college campuses. In order to conduct this historical analysis, primary sources from the university’s Archives Collection were studied that included administrative documents, memos, financial documents, program reports, newspaper clippings, and training and workshop materials. Secondary sources were included to provide context to the topic of sexual violence, research, feminism, and campus culture during this time period. Amidst the university’s varied response and debates that surrounded sexual violence, the students’ persistent advocacy had led to conflict resolution.

scholarly journals Paediatric ED utilisation in the early phase of the COVID-19 pandemic

2020 ◽  
pp. emermed-2020-210124 ◽  
Author(s):  
Lois Lee ◽  
Rebekah Mannix ◽  
Romain Guedj ◽  
Shu-Ling Chong ◽  
Sidney Sunwoo ◽  
...  
Keyword(s):  
Intensive Care Unit ◽  
Rank Test ◽  
Patient Volume ◽  
Icu Admission ◽  
Time Period ◽  
Signed Rank ◽  
Wilcoxon Signed Rank Test ◽  
Signed Rank Test ◽  
Varied Response ◽  
The One

BackgroundPast epidemics, including influenza, have resulted in increased paediatric patient volume in EDs. During the early weeks of the COVID-19 pandemic, it was unclear how ED volume would be impacted in paediatric hospitals. The objective of this study was to examine differences in the international experience of paediatric ED utilisation and disposition at five different children’s hospitals.MethodsWe obtained data on ED volume, acuity level and disposition (hospitalisation and intensive care unit (ICU) admission) for the time period 1 December1–10 August for the years 2017–2020 from hospitals in five cities (Boston, Massachusetts, USA; Singapore; Melbourne, Australia; Seattle, Washington, USA; and Paris, France). Per cent change was analysed using paired t-tests or Wilcoxon signed rank test.ResultsOverall ED volume dramatically decreased in all five hospitals during the early months of COVID-19 compared with prior years. There was a more varied response of decreases in ED volume by acuity level, hospitalisation and ICU admission among the five hospitals. The one exception was a 2% increase in ICU admissions in Paris. As of August 2020, all hospitals have demonstrated increases in ED volume; however, they are still below baseline.ConclusionPaediatric EDs in these five cities demonstrated differential decreases of ED volume by acuity and disposition during the early months of the COVID-19 pandemic.

scholarly journals A Comparative Study of Electric Load Curve Changes in an Urban Low-Voltage Substation in Spain during the Economic Crisis (2008–2013)

2014 ◽  
Vol 2014 ◽  
pp. 1-14 ◽  
Author(s):  
Pedro M. Lara-Santillán ◽  
Montserrat Mendoza-Villena ◽  
L. Alfredo Fernández-Jiménez ◽  
Mario Mañana-Canteli
Keyword(s):  
Comparative Study ◽  
Economic Crisis ◽  
Low Voltage ◽  
Electricity Consumption ◽  
Load Curve ◽  
Consumption Values ◽  
Time Period ◽  
Selection Parameter ◽  
Day Of The Week ◽  
Daily Time

This paper presents a comparative study of the electricity consumption (EC) in an urban low-voltage substation before and during the economic crisis (2008–2013). This low-voltage substation supplies electric power to near 400 users. The EC was measured for an 11-year period (2002–2012) with a sampling time of 1 minute. The study described in the paper consists of detecting the changes produced in the load curves of this substation along the time due to changes in the behaviour of consumers. The EC was compared using representative curves per time period (precrisis and crisis). These representative curves were obtained after a computational process, which was based on a search for days with similar curves to the curve of a determined (base) date. This similitude was assessed by the proximity on the calendar, day of the week, daylight time, and outdoor temperature. The last selection parameter was the error between the nearest neighbour curves and the base date curve. The obtained representative curves were linearized to determine changes in their structure (maximum and minimum consumption values, duration of the daily time slot, etc.). The results primarily indicate an increase in the EC in the night slot during the summer months in the crisis period.

scholarly journals The day-of-the-week effect: South African stock market indices

2018 ◽  
Vol 9 (2) ◽  
pp. 197-212 ◽  
Author(s):  
Elda du Toit ◽  
John Henry Hall ◽  
Rudra Prakash Pradhan
Keyword(s):  
South African ◽  
Stock Exchange ◽  
Garch Model ◽  
Statistical Technique ◽  
Data Set ◽  
Content Type ◽  
Johannesburg Stock Exchange ◽  
Time Period ◽  
Day Of The Week ◽  
Micro Level

Purpose The presence of a day-of-the-week effect has been investigated by many researchers over many years, using a variety of financial data and methods. However, differences in methodology between studies could have led to conflicting results. The purpose of this paper is to expand on an existing study to observe whether an analysis of the same data set with some added years and using a different statistical technique provide the same results. Design/methodology/approach The study examines the presence of a day-of-the-week effect on the Johannesburg Stock Exchange (JSE) indices for the period March 1995-2016, using a GARCH model. Findings The findings show that, contrary to the original study, the day-of-the week effect is present in both volatility and return equations. The highest and lowest returns are observed on Monday and Friday, respectively, while volatility is observed on all five days from Monday to Friday. Originality/value This study adds to the existing literature on day-of-the-week effect of JSE indices, where different patterns or, in some cases, no pattern have been noted. Few previous studies on the day-of-the-week effect observed the effect at micro-level for separate industries or made use of a GARCH model. The present study thus expands on the study of Mbululu and Chipeta (2012), by adding four additional observation years and using a different statistical technique, to observe differences that arise from a different time period and statistical technique. The results indicate that a day-of-the-week effect is mostly a function of the statistical technique applied.

scholarly journals Accelerometer-Measured Diurnal Patterns of Sedentary Behavior among Japanese Workers: A Descriptive Epidemiological Study

2020 ◽  
Vol 17 (11) ◽  
pp. 3814
Author(s):  
Sayaka Kurosawa ◽  
Ai Shibata ◽  
Kaori Ishii ◽  
Mohammad Javad Koohsari ◽  
Koichiro Oka
Keyword(s):  
Sedentary Behavior ◽  
Multivariate Regression ◽  
Sedentary Time ◽  
Time Of Day ◽  
Work Related ◽  
Diurnal Patterns ◽  
Time Period ◽  
Japanese Workers ◽  
Sociodemographic Correlates ◽  
Day Of The Week

Increased sedentary behavior (SB) can adversely affect health. Understanding time-dependent patterns of SB and its correlates can inform targeted approaches for prevention. This study examined diurnal patterns of SB and its sociodemographic associations among Japanese workers. The proportion of sedentary time (% of wear time) and the number of breaks in SB (times/sedentary hour) of 405 workers (aged 40–64 years) were assessed using an accelerometer. SB patterns and sociodemographic associations between each time period (morning, afternoon, evening) on workdays and nonworkdays were examined in a series of multivariate regression analyses, adjusting for other sociodemographic associations. On both workdays and nonworkdays, the proportion of sedentary time was lowest in the morning and increased towards evening (b = 12.95, 95% CI: 11.28 to 14.62; b = 14.31, 95% CI: 12.73 to 15.88), with opposite trend for breaks. Being male was consistently correlated with SB. Other sociodemographic correlates differed depending on time-of-day and day-of-the-week. For instance, desk-based workstyles and urban residential area were associated with SB during workday mornings and afternoons, being single was related to mornings and evenings, workdays and nonworkdays. Initiatives to address SB should focus not only on work-related but time-of-day contexts, especially for at-risk subgroups during each period.

scholarly journals The Halloween effect on the agricultural commodities markets

2017 ◽  
Vol 63 (No. 10) ◽  
pp. 441-448 ◽  
Author(s):  
Arendas Peter
Keyword(s):  
Financial Markets ◽  
Asset Returns ◽  
Winter Period ◽  
Agricultural Commodities ◽  
Summer Period ◽  
Price Series ◽  
Time Period ◽  
Halloween Effect ◽  
Commodities Markets

The financial markets are impacted by various seasonal anomalies. One of the best known of them is the Halloween effect. The Halloween effect means that the summer period (May–October) asset returns are lower compared to the winter period (November–April) asset returns. In the paper, price series of 20 major agricultural commodities over the 1980–2015-time period are tested for the presence of the Halloween effect. The data show that 15 out of the 20 commodities recorded a higher average winter period than summer period returns and in 10 cases, the differences are statistically significant. The data also show that out of the 5 commodities with higher summer period returns, only in the case of poultry the differences are statistically significant.  

scholarly journals CASSAVA WASTE AS AN ADDITIONAL SOURCE OF ORGANIC COMPOSES

2019 ◽  
Vol 2 (2) ◽  
pp. 44-47
Author(s):  
Nadhia Nurul Haq
Keyword(s):  
Additional Source ◽  
Water Spinach ◽  
Fermentation Time ◽  
Significance Level ◽  
Randomized Design ◽  
Time Period ◽  
Completely Randomized Design ◽  
One Way Anova ◽  
Range Test ◽  
Cassava Waste

This research aims to determine the effectiveness of adding powder cassava waste in compost making. Versatile in making compost. This research uses a Completely Randomized Design consisting of 4 settings with 3 replications with different amounts. The parameters chosen were composting temperature, composting fermentation time period, composting humidity, acidity composting and continued with water spinach growth vegetative test. Data analysis using one-way ANOVA test and further tests with Duncan's Multi Range Test at 1% significance level. Research results for 30 days in making compost with cassava powder complement, like fertilizer after growth, Vegetative ground spinach (ipomoea reptans) did not show a significant effect or no effect

scholarly journals Fictional Expectations and the Global Media in the Greek Debt Crisis: A Topic Modeling Approach

2018 ◽  
Vol 59 (2) ◽  
pp. 525-566 ◽  
Author(s):  
Volker Daniel ◽  
Magnus Neubert ◽  
Agnes Orban
Keyword(s):  
New York ◽  
Financial Markets ◽  
Media Coverage ◽  
Topic Modeling ◽  
Debt Crisis ◽  
News Coverage ◽  
New York Times ◽  
Global Media ◽  
Time Period ◽  
The Media

Abstract We study the role of global media during the Greek debt crisis and relate it to the transmission of events on financial actors’ expectations. To identify news coverage about the Greek debt crisis, we apply topic modeling to a newly compiled dataset of over 430,000 articles from The International New York Times and Financial Times from 2009 to 2015. We identify a Greek debt crisis topic and relate it to events concerning Greece during this time period. Our finding is that events are only relevant for financial markets when they are covered in the media, whereas events without media coverage have no effect. News coverage without immediate events is equally irrelevant for financial markets.

Sign in / Sign up

Export Citation Format

Share Document