1,721,028 research outputs found
Are Risk Attitudes and Time Preferences Crucial Factors for Crop Diversification by Smallholder Farmers?
No full textThis study examines whether the decision of crop diversification for perennial crops is based on risk attitudes and time preferences. We conducted incentivised field experiments with farmers only cultivating rubber and those cultivating rubber and oil palm. We utilised Holt and Laury task and Coller and William task. We found that farmers who cultivate two crops are more risk-averse, indicating that they see crop diversification as a safer option for their farms. However, the discount rates of the two groups are not significantly different. These results provide relevant information for policymakers who intend to either encourage or discourage oil palm cultivation. © 2020 The Authors. Journal of International Development published by John Wiley & Sons Lt
Can crop diversification of perennial crop by smallholder farmers explained by risk attitudes and time preferences?
No full textThis study examines whether the decision of crop diversification for perennial crops is based on underlying risk attitudes and time preferences. We conducted incentivised field experiments on Sumatra Island, Indonesia, involving farmers who cultivate rubber and farmers who cultivated rubber and oil palm trees, i.e., undertook crop diversification. We estimated risk attitudes and time preferences jointly. The results indicated that farmers who undertook crop diversification were statistically significantly more risk-averse than rubber farmers. However, the time preferences between the two groups were not statistically significantly different
an ex-ante policy evaluation
No full textDeforestation is one of many factors that hinder smallholder farmers’ participation in sustainable palm oil (SPO) certification. Thus, policies that enhance the appetite for rainforest preservation might be helpful to increase the participation rate in certification schemes. Our study aims to investigate ex-ante the effects of several promising policies on mitigating deforestation. To do so, we used an incentivized experiment which creates a conflict of short-term individual interests and long-term collective interests regarding deforestation. We examined the effects of three policies: price premiums, provision of environmental information, and contributor recognition. Our research took place in Jambi Province, Sumatra, and involved 636 smallholders. We found that price premiums and the provision of context-specific environmental information reduce rainforest transformation. However, there is an absence of significant effects for contributor recognition. Our results also can be used to estimate the participation of smallholders in more sustainable farming practices within the scheme of SPO certification
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
No full text“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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