scholarly journals Importance Sampling and Necessary Sample Size: An Information Theory Approach

2018 ◽  
Vol 6 (2) ◽  
pp. 867-879 ◽  
Author(s):  
Daniel Sanz-Alonso
2019 ◽  
Author(s):  
Miguel Equihua Zamora ◽  
Mariana Espinosa ◽  
Carlos Gershenson ◽  
Oliver López-Corona ◽  
Mariana Munguia ◽  
...  

We review the concept of ecosystem resilience in its relation to ecosystem integrity from an information theory approach. We summarize the literature on the subject identifying three main narratives: ecosystem properties that enable them to be more resilient; ecosystem response to perturbations; and complexity. We also include original ideas with theoretical and quantitative developments with application examples. The main contribution is a new way to rethink resilience, that is mathematically formal and easy to evaluate heuristically in real-world applications: ecosystem antifragility. An ecosystem is antifragile if it benefits from environmental variability. Antifragility therefore goes beyond robustness or resilience because while resilient/robust systems are merely perturbation-resistant, antifragile structures not only withstand stress but also benefit from it.


1987 ◽  
Vol 19 (3) ◽  
pp. 385-394 ◽  
Author(s):  
J R Roy

In the use of information theory for the development of forecasting models, two alternative approaches can be used, based either on Shannon entropy or on Kullback information gain. In this paper, a new approach is presented, which combines the usually superior statistical inference powers of the Kullback procedure with the advantages of the availability of calibrated ‘elasticity’ parameters in the Shannon approach. Situations are discussed where the combined approach is preferable to either of the two existing procedures, and the principles are illustrated with the help of a small numerical example.


2011 ◽  
Vol 145 (2) ◽  
pp. 385-409 ◽  
Author(s):  
David M. Rogers ◽  
Thomas L. Beck ◽  
Susan B. Rempe

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Giang NT Nguyen ◽  
Thinh Gia Hoang ◽  
Tam Minh Nguyen ◽  
Thanh Thien Ngo

Purpose This paper aims to explore the motivational factors and contextual facilitators of female entrepreneurs in Vietnam’s coffee industry and also the barriers facing them. Design/methodology/approach This study adopts the grounded theory approach, using semi-structured in-depth interviews with 31 women entrepreneurs in the coffee industry in the rural Central Highlands of Vietnam. Findings This study found that necessity-driven factors play an important role in motivating female entrepreneurs to advance their careers. However, these factors may be transformed into the opportunity-driven motives. Furthermore, the findings suggest that Asia’s collectivism culture and family support significantly affect the success of the women entrepreneurs, although gender inequality is not perceived as a serious constraint in entrepreneurial activities. Research limitations/implications This study has implications for the literature of women entrepreneurs regarding motivations and contextual influences in agricultural and rural areas of Vietnam. However, the sample size is relatively small which limits the concept generation of the study. For further research, a larger sample size with different business sectors should be considered to generate more explicit findings. Practical implications The findings from this study can assist the policymakers in developing strategies and governmental policies to support the career advancement of women entrepreneurs and improving gender equality in Vietnam. Originality/value This study contributes to the literature about understanding the motives and the roles of socioeconomic contexts in women’s entrepreneurial activities in agricultural and rural areas.


2019 ◽  
Vol 159 (1) ◽  
pp. 16
Author(s):  
Javiera Astudillo ◽  
Pavlos Protopapas ◽  
Karim Pichara ◽  
Pablo Huijse

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