1,721,110 research outputs found
A multi-step approach to model the relative efficiency of European ports: the role of regulation and other non–discretionary factors
No full text
I servizi pubblici locali per la mobilità
No full textIl lavoro descrive una sintesi dei risultati preliminari di un’attività di ricerca sui servizi pubblici locali avente per oggetto la mobilità in termini di domanda e l’efficienza dei servizi offerti.
I risultati mostrano come la qualità di questi servizi, in questi ultimi anni, non sia migliorata, anzi è cresciuta in alcuni casi l’insoddisfazione dell’utenza. Gli indicatori di efficienza segnalano una situazione critica con riferimento all’intero territorio nazionale, pur essendoci un divario tra le regioni settentrionali e quelle meridionali.
In questo lavoro vengono discusse alcune criticità che hanno caratterizzato i servizi pubblici locali per la mobilità e individuate sinteticamente direzioni per un trasporto urbano più efficiente
Port management performance and contextual variables: which relationship? Methodological and empirical issues
No full textThis paper applies the production framework associated with a mixture of data envelopment analysis (DEA) and
stochastic frontier analysis (SFA) to evaluate the relative efficiency of port management across countries. Differently
from previous studies, a three stage approach is adopted in order to identify the role of contextual factors on
an input-by-input basis. It involves using DEA for evaluating efficiency in the I and in the III stage, and SFA, carried
out through fixed-effect estimators, in the II stage. The latter for controlling the role of external environment in
determining input-specific efficiency differentials across ports. The sample is composed of 30 ports observed over
the period 1995–2009. The outcome of the DEA applied in the III stage shows that netting inputs of the impact of
factors considered outside direct ports' managers control, relative performances of ports change significantly.
Any evaluation procedure of port performance should take into account the effect of contextual variables, as identified
not only through overall efficiency, but also through input performance
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
Port management performance and contextual variables: which relationship? Methodological and empirical issues
No full textThis paper applies the production framework associated with a mixture of data envelopment analysis (DEA) and
stochastic frontier analysis (SFA) to evaluate the relative efficiency of port management across countries. Differently
from previous studies, a three stage approach is adopted in order to identify the role of contextual factors on
an input-by-input basis. It involves using DEA for evaluating efficiency in the I and in the III stage, and SFA, carried
out through fixed-effect estimators, in the II stage. The latter for controlling the role of external environment in
determining input-specific efficiency differentials across ports. The sample is composed of 30 ports observed over
the period 1995–2009. The outcome of the DEA applied in the III stage shows that netting inputs of the impact of
factors considered outside direct ports' managers control, relative performances of ports change significantly.
Any evaluation procedure of port performance should take into account the effect of contextual variables, as identified
not only through overall efficiency, but also through input performance
- …
