scholarly journals Impact Of Nile Perch (Lates Niloticus) Overfishing On Technical Efficiency Of Fishers In Lake Victoria Tanzania

2020 ◽  
Author(s):  
Eliaza Mkuna ◽  
Lloyd JS Baiyegunhi
Keyword(s):  
Technical Efficiency ◽  
Lake Victoria ◽  
Mesh Size ◽  
Nile Perch ◽  
Data Envelopment ◽  
Significant Difference ◽  
Landing Sites ◽  
High Level ◽  
The Impact ◽  
Significant Factors

Abstract Lake Victoria fishery activities are of crucial economic importance to the communities around East Africa as they support the majority of fishers specifically through Nile perch fishing. As a consequence, increasing fishing pressure had also led to overfishing. This study employed the Data Envelopment Analysis (DEA) and Propensity Score Matching (PSM) techniques to assess the impact of Nile perch overfishing on technical efficiency of fishers based on a survey of 268 fishers across 10 landing sites in Lake Victoria, Tanzania. Results from the DEA show that, overall Nile perch fishers have average technical efficiency of 30% which indicates a high level of inefficiency. Specifically, there is no statistically significant difference in the technical efficiencies for Nile perch fishers who are overfishing and those who are not overfishing due to fisher’s mobility across the Lake. In addition, mode of propulsion and being a member of fishery organization were found to be statistically significant factors influencing inefficiency of Nile perch fishers. Furthermore, results from the probit estimates of the PSM show that being a member of fishery organization, quantity of Nile perch harvested per trip, age of a fishing vessel (boat), the gillnet mesh size and cost of fishing inputs have statistically significant effect in influencing the probability of Nile perch overfishing. However, further result indicates that Nile perch overfishing do not have statistically significant impact on fisher’s technical efficiency. Therefore, this study recommends a need to monitor and formalize fisher’s mobility as one of the alternative for co-management of the Lake. Also, overfishing can be controlled without necessarily affecting technical efficiency of Nile perch fishers through training and access to proper fishing gears.

scholarly journals Impact of Nile perch (Lates niloticus) overfishing on fishers’ income: Evidence from Lake Victoria, Tanzania

2020 ◽  
pp. 213-229
Author(s):  
Eliaza Mkuna ◽  
◽  
Lloyd Baiyegunhi ◽  
Keyword(s):  
Lake Victoria ◽  
Fishing Effort ◽  
Nile Perch ◽  
Switching Regression ◽  
Policy Makers ◽  
Fishing Trip ◽  
Significant Difference ◽  
Landing Sites ◽  
Lates Niloticus ◽  
Potential Impact

Despite the crucial role played by Nile perch in the income of fishers around Lake Victoria, Tanzania, fishing pressure has increased in recent years and has led to overfishing and, consequently, a risk to the lake’s future sustainability and the fishers’ livelihoods. This study used data collected in 2018 from 268 randomly selected sample fishers at 10 landing sites across Lake Victoria. In conjunction with the endogenous switching regression model, the potential impact of Nile perch overfishing on the fishers’ income per fishing trip in Lake Victoria was evaluated. The results show that there is a significant difference in the socio-economic, institutional and fishing effort characteristics of Nile perch fishers who overfish and those who do not. In particular, Nile perch fishers who overfish earn significantly higher incomes per fishing trip than fishers who do not overfish. The study recommends the need for policy makers to develop policies that acknowledge the dynamics of socio-economic, institutional and fishing effort factors. In addition, more flexible fish quota restrictions and consistent fishing patrols need to be enforced to ensure compliance with fishery regulations. These measures should promote a balance between the sustainability of fishery resources and an improved income for Nile perch fishers in Lake Victoria.

scholarly journals Performance Assessment Based on the Relative Efficiency of Indian Opencast Coal Mines Using Data Envelopment Analysis and Malmquist Productivity Index

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4902
Author(s):  
Biswaranjita Mahapatra ◽  
Chandan Bhar ◽  
Sandeep Mondal
Keyword(s):  
Data Envelopment Analysis ◽  
Technical Efficiency ◽  
Primary Source ◽  
Efficiency Score ◽  
Malmquist Productivity Index ◽  
Productivity Index ◽  
Scale Efficiency ◽  
Data Envelopment ◽  
Significant Difference ◽  
Using Data

Coal is the primary source of energy in India. Despite being the second-largest coal-producingcountry, there exists a significant difference in demand and production in India. In this study, the relativeefficiency of twenty-eight selected opencast mines from a large public sector undertaking coal companyin India for 2018–2019 was assessed and ranked by using data envelopment analysis (DEA). This studyused input-oriented DEA with efficiency decomposition to pure technical efficiency, technical efficiency,and scale efficiency. The result showed that 25% and 36% of mines were efficient in technical efficiencyand pure technical efficiency, respectively, whereas the eight mines scale efficiency was inefficient witha decreasing return to scale. Further, in this study, theMalmquist Productivity Index (MPI)was employedto measure the efficiency of the selected mines for three consecutive years (2016–2017 to 2018–2019).The result shows that in only three mines the efficiency is continuously improving from 2016–2017 to2018–2019, whereas in more than 20% of mines the efficiency score is decreasing. Comparing theMPIefficiency and productivity assessment throughout the years, changes in innovation and technology areincreasing from 2017–2018 to 2018–2019. Finally, the study concluded with a comprehensive evaluationof each variable with mines performance. The author formulated the strategies, which in turn help coalprofessionals to improve the efficiency of the mine.

scholarly journals Performance Evaluation in the UEFA Champions League

2015 ◽  
Vol 18 (5) ◽  
pp. 448-470 ◽  
Author(s):  
Fabíola Zambom-Ferraresi ◽  
Lucía Isabel García-Cebrián ◽  
Fernando Lera-López ◽  
Belén Iráizoz
Keyword(s):  
Performance Evaluation ◽  
Data Envelopment Analysis ◽  
Technical Efficiency ◽  
Estimation Methods ◽  
Data Envelopment ◽  
Sports Performance ◽  
Management Implications ◽  
European Football ◽  
High Level ◽  
Selection Of

This article aims to evaluate the sports performance of teams that have participated in the Union of European Football Associations (UEFA) Champions League (UCL) during the last 10 seasons (2004-2005 to 2013-2014). Technical efficiency is estimated using well-known data envelopment analysis (DEA) approaches and a bootstrapped DEA model. To solve the problem of measuring sporting results as output in knockout competitions, we propose the use of the coefficients applied by the UEFA from UCL revenue distribution. The results obtained show first that there is a high level of inefficiency in UCL over the period studied: Only 10% of the teams seem to be efficient. Also, the teams have many problems in maintaining their efficiency during the seasons. Second, the champion is always efficient. Third, we identify two sources of inefficiency: waste of sports resources and the selection of sporting tactics. Finally, from a methodological perspective, the output measure proposed seems to be suitable to represent reliably the sports results achieved by clubs in this qualifying competition type. Furthermore, our results are robust when applying alternative estimation methods. Regarding the results, some management implications are discussed and suggestions are made to boost the efficiency in inefficient clubs.

scholarly journals The Impact of ICT on Technical Efficiency of Vietnam’s Enterprises

2021 ◽  
pp. 65-73
Author(s):  
Nguyen Anh Phong ◽  
Bui Thi Quynh Dao ◽  
Le Thi Thuy Hue ◽  
Nguyen Ngoc Van Khanh ◽  
Nguyen Lam Thanh Ngan ◽  
...  
Keyword(s):  
Technical Efficiency ◽  
Labor Productivity ◽  
Positive Impact ◽  
Market Size ◽  
Sustainable Performance ◽  
Output Factors ◽  
Equity Ratio ◽  
High Level ◽  
Logit Regression Model ◽  
The Impact

This research evaluates the impact of ICT on the technical efficiency of firms in 63 provinces and cities in Vietnam. We apply to use the DEA method in which we use the variable return to scale to evaluate because firm sizes in 63 provinces are different. At the same time, this method aims to minimize input factors without reducing output factors to measure technical efficiency. This result that is used a binary variable in the logit regression model to identify factors that have an impact on technical efficiency, especially the ICT factor. The research results show that only nearly 10% of the provinces could be technically efficient in business activities. Provinces with sustainable performance and efficiency all depend on influencing factors such as equity ratio, labor productivity, market size, investment, and especially the ICT factor keep increasing over the years and fluctuate around a pretty high level. On the other hand, for the group of unsustainable and ineffective provinces, these variables tend to decrease and fluctuate around at a low level. The research shows that factors in labor productivity, equity ratio, market size, investment, and ICT all have a positive impact on a firm’s performance in 63 provinces and cities of Vietnam. Therefore, firms that want to enhance their efficiency need to have strategies to improve the factors mentioned above. Moreover, the local government needs to improve the ICT index to help to increase their local Enterprises’ efficiency.

scholarly journals EBA's Capital Exercise and Technical Efficiency of the Banks

2020 ◽  
Vol 12 (4) ◽  
pp. 371-402
Author(s):  
Adhiraj Singh Rathore
Keyword(s):  
Technical Efficiency ◽  
Financial Distress ◽  
Capital Requirements ◽  
Data Envelopment ◽  
Tobit Regression ◽  
Macroeconomic Conditions ◽  
Country Level ◽  
European Banking ◽  
The Impact

This study uses a sample of 194 banks from 15 EU countries and two-stage data envelopment analysis (DEA) to provide evidence on the impact of the European Banking Authority (EBA)'s capital exercise on banks' efficiency. In the first stage of the analysis, we measure the efficiency by employing DEA. We then use Tobit regression to investigate the impact of the capital exercise on banks' technical efficiency. We estimate several specifications while controlling for bank-specific attributes and country-level characteristics accounting for macroeconomic conditions, financial development and market structure. The results indicate that EBA's capital exercise came, as a shock for the banks would be contributing towards making the banks more stable. It would be preventing banks from excessive risk-taking activities. Furthermore, it would be allowing the banks to withstand the financial distress and contributing in banks be- coming less prone to the systemic risk. The study finds that the capital requirements would be creating favourable economic conditions, which would be, affect the extent, depth and quality of financial intermediation and banking services.

scholarly journals Misconceptions in NFL Injuries: A Study on the Achilles

2019 ◽  
Vol 4 (4) ◽  
pp. 2473011419S0035
Author(s):  
Lauren V. Ready ◽  
Neill Y. Li ◽  
Samantha J. Worobey ◽  
Nicholas J. Lemme ◽  
JaeWon Yang ◽  
...  
Keyword(s):  
National Football League ◽  
Weather Conditions ◽  
Analysis Data ◽  
American Football ◽  
Injury Incidence ◽  
Field Representation ◽  
Career Length ◽  
Significant Difference ◽  
High Level ◽  
The Impact

Category: Sports, Trauma, Ankle, Achilles Introduction/Purpose: Injuries are an ever-present entity in the National Football League, with recent research highlighting American football with the highest injury incidence among all major sports. A torn Achilles can sideline a player for six to twelve months and reduce their power rankings by over fifty percent. Within Achilles tears, there was a focus on comparing rookie rates to the rest of the players, examining tear rates for different game conditions and studying the day of the week the injury occurred. Due to the impact of the injury and limited research, we sought to examine Achilles tears in the NFL from 2009-2016 to identify trends correlating tears with game and player demographics. Methods: NFL players with a diagnosed Achilles tear between 2009 and 2016 were selected as the study population for this retrospective analysis. Data on NFL injury was collected from an established database, previously comprised of publicly available athlete information. NFL player profiles were then employed to determine position, team and game statistics at time of injury. Injury rates were calculated as a percentage of total league games on Thursdays and Sundays. The proportion of rookies in the NFL was approximated by summing the number of draft picks and the number of signed, undrafted free agents and measured against the total number of roster spots before the commencement of the season. Game surface was discerned at time of injury by consulting a timeline of the field surfaces and cross referencing the date of the game. Game conditions, such as weather and temperature, were discerned from the game logs published on the NFL website. Results: There were 101 documented Achilles tears. Sixty-four percent (65/101) occurred before the official season, in training or pre-season games. Only 1% (1/101) of tears occurring during post-season play-offs. Twenty-nine percent (19/65) of the pre- season tears occurred in rookies and 97% (35/36) of the in-season game tears affected non-rookies. Thirty-six percent (36/101) of all documented tears occurred in undrafted free agents. Of players with Achilles tear, 58.41% (59/101) returned to play in the NFL after injury. Despite an average age of 26.7 years, the tear distribution was bimodal with players, ages 24 and 36, exhibited the highest rates of tear. With regard to tears during games, 43.18% occurred on grass and 56.82% occurred on turf. These values mirror their field representation in games. The average game temperature was 67.04 degrees Fahrenheit with wide stratification (range: 1-91 degrees). When examining rate of tears for players during away versus home games, there was not a significant difference of note; of the 45 in-game tears, 21 (46.67%) occurred in home games and 24 (53.33%) during away games. Conclusion: In our focused analysis of the Achilles in NFL athletes, we show no significant difference in tear rates when comparing grass and artificial turf surfaces and in comparing Thursday and Sunday games. When reviewing experience level, a large percent of the tears occurred in rookie players, especially during the pre-season, despite these players making up less than a quarter of the athletes. We also show that tears were not restricted to certain weather conditions. When analyzing career length post tear, most players that returned to play continued to perform at a high level. This challenges the perception of AT tear as a career-ending injury.

Assessing the Technical Efficiency of Traditional and Corporate Agents in Indian Life Insurance Industry: Slack-based Data Envelopment Analysis Approach

2018 ◽  
Vol 21 (2) ◽  
pp. 490-506 ◽  
Author(s):  
Ankitha Shetty ◽  
Savitha Basri
Keyword(s):  
Data Envelopment Analysis ◽  
Technical Efficiency ◽  
Life Insurance ◽  
Insurance Industry ◽  
Distribution Channels ◽  
Insurance Companies ◽  
Data Envelopment ◽  
Life Insurance Industry ◽  
Significant Difference

The distribution channels play an imperative role in the life insurance industry. In India, traditional and corporate agency are contributing immensely to the profitability of the insurance companies. The challenges faced by the distributional channels such as high attrition, soaring expense ratio and sales inefficiency have created the need to probe into the efficiency aspects of the channel players. In the absence of such studies in India, this article evaluates the technical efficiency of distribution channels in life insurance industry by analysing the data collected from 12 insurance companies for the period 2012 to 2016. The efficiency scores were obtained by applying data envelopment analysis that considered two inputs (number of agents and commission expenses) and two outputs (average business premium and total policies sold). The findings reveal no significant difference in the efficiency scores of bancassurance and traditional agents. Quiet life hypothesis that market share (ratio of premium contribution to total premium) of distributional channels and their efficiency scores are negatively correlated is not supported. Moreover, the slack analysis shows excess inputs per output generated for both the channels. If the companies that scored low in efficiency do not plug the leakages regarding commission as well a number of agents, adverse performance in the long-term and consequent financial crisis are inevitable.

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