1,721,083 research outputs found
Raffaelli (R.) et Tontini (Α.), Lecturae Plautinae Sarsinates. I. Amphitruo, 1998
No full textCrampon Monique. Raffaelli (R.) et Tontini (Α.), Lecturae Plautinae Sarsinates. I. Amphitruo, 1998. In: Revue des Études Anciennes. Tome 102, 2000, n°3-4. pp. 551-552
Raffaelli (R.) et Tontini (Α.), Lecturae Plautinae Sarsinates. I. Amphitruo, 1998
No full textCrampon Monique. Raffaelli (R.) et Tontini (Α.), Lecturae Plautinae Sarsinates. I. Amphitruo, 1998. In: Revue des Études Anciennes. Tome 102, 2000, n°3-4. pp. 551-552
Does attribute cut-off elicitation affect choice consistency? Contrasting hypothetical and real-money choice experiments
No full textThe use of threshold values (cut-offs) is a well-recognized simplifying strategy in real life decision-making processes. Recent stated preference studies show that strategies used by respondents in hypothetical settings are consistent with how they normally process information in real markets. Of the different discrete choice models using cut-offs, the Swait (2001) model allows different heuristics to be captured. The few applications of this soft cut-off approach mainly focus on the effects of cut-offs on attribute estimates and willingness to pay, but scant attention has been paid to the consequences of cut-off elicitation. We focussed our investigation on the effects of self-reported cut-offs on choice consistency. In line with studies on context and complexity effects in choice modelling, we parameterize the scale parameter on the basis of two alternative measures related to the stated cut-offs: (1) the number of potential violations included in the choice cards, and (2) the number of cut-offs stated at the most severe level. Moreover, we investigated whether different treatments (hypothetical vs. real-money) affect cut-off elicitations, violations and choice consistency.
We tested our models using an empirical dataset generated by a field choice experiment on consumers׳ preferences for apples. The data show that most respondents stated they had cut-off values in mind when buying apples, but, as expected, in most cases they violated them in their actual choices. Estimation of heteroskedastic logit models shows that the proposed measures related to stated cut-offs have a systematic effect on the variance of the error term, but only in the hypothetical treatment. That is, respondents were found to be less consistent as the number of potential violations or the number of cut-offs stated at the most severe level increased. In the real-money treatment, neither of the coefficients of the two measures was statistically significant. This may indicate that when choices are binding, consumers put necessary effort into each choice card, regardless of the number of potential violations, and they are more consisten
Evaluation of the sustainability of strategies that include biocontrol agents to reduce chemical residues on strawberry fruits
No full textThe heating value of gas obtained from biomass gasification: a new method for its calculation or prediction
No full textTesting hypothetical bias with a real choice xperiment using respondents’ own money
No full textThe investigation of hypothetical bias in choice experiments (CEs) has typically been
conducted in the laboratory with only minimal field experiments. Moreover, it is
common practice to provide an initial endowment (money or coupons) to respondents.
In this research, we employed a between-subject CE in a supermarket with three different treatments (i.e. hypothetical, hypothetical with cheap talk script and real). With the
‘real’ treatment, we required respondents to use their own money when making a
payment. The proposed incentive-compatible mechanism mimics as close as possible
the everyday purchasing situation. Results confirm the presence of hypothetical bias
and the mixed effectiveness of a cheap talk scrip
Consumers' attitude to fruit produced by using biocontrol agents and climate change mitigation practices
No full textConcerns for potential risks related to the use of chemical pesticides have encouraged
research of low impact alternatives as biocontrol agents (BCAs) and the implementation of a more environmentally sound agricultural management as the integrated pest management (IPM) and organic
agriculture. A new regulation was recently implemented in the European Union (EC No 834/2007), which establishes the legal framework for all levels of production, distribution, control and labelling of
organic products. Most of the European consumers are now familiar with IPM and organic products. Climate change is becoming a hot issue and mitigation practices are under discussion in agriculture, too. The level of consumers’ awareness of mitigation practices and their willingness to pay for
products produced with low carbon emission is unknown. Consumers’ attitudes and preferences to fruit (apples) produced by using BCAs instead of chemical pesticides and/or climate change mitigation practices were evaluated in a choice experiment. Preference for other apple determinants such as origin, appearance and price were also considered. The survey was administered to 96 consumers in different supermarkets in Northern Italy during fall 2009. Results show that in purchase decision, origin and price are the major determinants, followed by organic production and good appearance.
Using BCAs and climate change mitigation practices increased the probability of purchasing apples. However, only coefficient associated to climate change is statistically significant and respondents are
willing to pay a premium price of about 0.50 Euro/kg. Moreover, results indicate that when buying apples most people have specific requirements in mind regarding method of production, origin, appearance and price, but comparing choices made by the respondents with their individually-stated
minimum requirements, the majority violated the
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
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