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Monetary values of transport service attributes: land versus maritime ro-ro transport. An application using adaptive stated preferences
No full textThe objective of this work is that of illustrating a methodology to derive, in terms
of trade-offs, the relative values of transport service attributes for logistics
operators. In particular, the analysis yields insights on the preferences for timesavings,
frequency and reliability of the transport service in terms of price, of a
sample of freight forwarders located in the South of Italy. The data is gathered
using an Adaptive Stated Preference application and the estimates are obtained
through a Tobit ML estimator on both company specific data and pooled data.
The results show that frequency is the most highly rated characteristic of the
service together with reliability. The value of time is significantly lower in both
cases. The outcome is consistent across estimations and, substantially in line with
the outcome of previous studies carried out on operators active at different levels
of the transport-logistic chain. Until now, in fact, studies have been carried out
uniquely on carriers or producers. The selection of freight forwarders allows to
shed light on a segment of the market that accounts for more than half of the
transport-related decisions. Furthermore, the present study focuses on a
comparison between all land transport and maritime ro-ro alternatives, in line
with the growing interest on the integration among transport modes. The output
signals both the absence of any a priori preclusion for ro-ro maritime services and
the extremely important role that frequency of service assumes for the
development and the establishment of maritime services as realistic alternatives
to all land transport
An Adaptive Conjoint Analysis of freight Service Alternative: evaluating the maritime option
No full textAn Analysis of Maritime Ro-Ro Freight Transport Service Attributes through Adaptive Stated Preference: an Application to a Sample of Freight Forwarders
Get PDFIn this paper we present preliminary evidence from a pilot study carried out with the primary objective
of testing the validity of adaptive conjoint data collecting methods in analysing operators’ preferences
when redirecting current on-land transport services to a hypothetical maritime ro-ro service alternative.
The analysis has focussed on a sample of freight forwarders. Through a combination of Revealed
Preferences and Adaptive Stated Preference Experiments we have constructed a database of their
preferences’ toward the maritime ro-ro alternative using a set of transport service attributes: price,
reliability, frequency, transit time, etc. We have estimated the relevant parameters through a Tobit model
and have been able to calculate relative trade-off values among the significant attributes. The resulting
ranking highlights the relative importance of reliability and frequency in the decision to switch to
maritime services
Choosing the sea: an Adaptive Conjoint Analysis of freight service alternatives
No full textQuaderno n.03-01, Working papers, Università della Svizzera italian
La domanda di servizi di short sea shipping: un'indagine sulle preferenze di un campione di operatori della logistica dell'Italia nord-occidentale,
No full textAn Adaptive Conjoint Analysis of Freight Service Alternatives: Evaluating the Maritime Option
No full textThe work focuses on analysing operators’ preferences in choosing among different mobility options. Differently from previous applications, where the focus has been on producers, in order to gain insights from a wider spectrum of possible uses the application has involved a small sample of freight forwarders. In line with experimental economics methodology, maximum likelihood estimations are carried out in order to take account of the choice context. The outcome seems to confirm that, as expected, conjoing analysis represent a valid option to estimate the attitude of operators for specific service attributes. The empirical evidence confirms that freight rates are not the only determinant of modal choice, but that in choosing the specific alternative modes other factors play a relevant role. Most notably, reliability and frequency. Value of time, of frequency and of reliability are estimated and compared with those obtained in previous studies
Short Sea Shipping: what opportunities for ro-ro services and “Sea Motorways”? A proposed framework for analysis and an application to the Italian North-Tyrrenian area
No full textGoing Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
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