2,204 research outputs found
Market Segmentation and Dynamic Analysis of Sparkling Wine Purchases in Italy
No full textMarket Segmentation and Dynamic Analysis
of Sparkling Wine Purchases in Italy
Francesca Bassi a, Fulvia Pennoni b and Luca Rossetto c
Abstract
The Italian market of sparkling wines increases as volume and assortment (such as brands,
appellations, typologies) mainly because of sparkling Prosecco consumption. We investigate
the repeated purchase behavior of sparkling wines in two years within the supermarket
channel through scanner data collected from a consumer panel. We propose a Hidden
Markov Model to analyze these data, assuming an unobservable process to capture consum-
ers’ preferences and allowing us to consider purchases sparsity over time. We consider multi-
variate responses defining types of purchases, namely price, appellation, and sugar content.
Customers’ covariates influence the initial and transition probabilities of the latent process.
We identify five market segments, and we track their evolution over time. One segment
includes Prosecco-oriented consumers, and we show that loyalty to Prosecco changes strongly
over time according to the region of residence, income, and family type. The findings improve
the understanding of the market and may provide evidence to design successful marketing
strategies
I fattori di virulenza di Salmonella enterica: meccanismi di interazione con l'organismo ospite
No full textWhat influences media coverage? African countries in major Italian newspapers: 1996-2015
No full textThe mass media play a key role on the public and policy agenda, especially for events and issues regarding foreign countries. However, it is not clear the rationale involved in the media coverage. This paper studies the references to African countries in two major Italian newspapers between 1996 and 2015. A panel analysis shows that the macroeconomic conditions and the occurrence of coups d'état do not exert a decisive impact on the mentions of a country, while the countries with the lowest life expectancy are more frequently in the news
Non-Markovian quantum trajectories: An exact result
No full textWe analyze the non-Markovian stochastic Schrödinger equation describing a particle subject to spontaneous collapses in space (in the language of collapse models), or subject to a continuous measurement of its position (in the language of continuous quantum measurement). For the first time, we give the explicit general solution for the free particle case (H=p^2/2m) and discuss the main properties. We analyze the case of an exponential correlation function for the noise, giving a quantitative description of the dynamics and of its dependence on the correlation time
Non-Markovian dynamics for a free quantum particle subject to spontaneous collapse in space: general solution and main properties
No full textLatent class analysis for evaluating a multi-item scale to measure customer satisfaction with reference to a shopping good: a pair of branded jeans
No full textIn the field of marketing many objects of interest exist that are not directly observable, nevertheless they can be measured through multi-item measurement scales. As a consequence, this kind of instruments are extremely useful and their importance requires an accurate development and validation procedure. The traditional marketing literature highlights specific protocols along with statistical instruments and techniques to be used for achieving this goal. For example, correlation coefficients, univariate and multivariate analysis of variance and factorial analysis are widely employed with this purpose. However, these kind of statistical tools are usually suited for metric variables but they are adopted even when the nature of the observed variables is different, as it often occurs, since in many cases the variables measured by the items of which the scale is made up are ordinal. On the contrary, latent class analysis takes explicitly into account the ordinal nature of the observed variables and also the fact that the object of interest, that has to be measured, is unobservable. The aim of this paper is showing how latent class analysis can improve the procedures for developing and validating a multi-item measurement scale for measuring customer satisfaction with reference to a shopping good that is a good characterized by a high level of involvement and an emotional learning, linked to the lifestyle of the customer. This latent class approach explicitly considers both the ordinal nature of the observed variables and the fact that the construct to be measured is not directly observable. Especially, applying appropriate latent class models, important features such as scale dimensionality, criterion and construct validity can be better assessed while evaluating the scale
Web information, accessibility and museum ownership
No full textWhen planning a holiday, the pre-trip phase is crucial for persons with disabilities (PWDs) and their families. The potential of the World Wide Web to disseminate information devoted to PWDs and regarding the accessibility of tourism attractions is great. However, the propensity to disseminate information online varies depending on the type of organization. This paper assesses the impact of the ownership of museums in Tuscany (central Italy) on whether a museum has online information specifically for PWDs. Tuscany is a frequent destination for domestic and foreign tourists and the online communication of museums addresses a large and heterogeneous audience. The empirical analysis shows that public museums tend to deliver more information for PWDs, compared to private and ecclesiastical museums
Dissipation of Light Energy Absorbed in Excess: The Molecular Mechanisms
No full text: Light is essential for photosynthesis. Nevertheless, its intensity widely changes depending on time of day, weather, season, and localization of individual leaves within canopies. This variability means that light collected by the light-harvesting system is often in excess with respect to photon fluence or spectral quality in the context of the capacity of photosynthetic metabolism to use ATP and reductants produced from the light reactions. Absorption of excess light can lead to increased production of excited, highly reactive intermediates, which expose photosynthetic organisms to serious risks of oxidative damage. Prevention and management of such stress are performed by photoprotective mechanisms, which operate by cutting down light absorption, limiting the generation of redox-active molecules, or scavenging reactive oxygen species that are released despite the operation of preventive mechanisms. Here, we describe the major physiological and molecular mechanisms of photoprotection involved in the harmless removal of the excess light energy absorbed by green algae and land plants. In vivo analyses of mutants targeting photosynthetic components and the enhanced resolution of spectroscopic techniques have highlighted specific mechanisms protecting the photosynthetic apparatus from overexcitation. Recent findings unveil a network of multiple interacting elements, the reaction times of which vary from a millisecond to weeks, that continuously maintain photosynthetic organisms within the narrow safety range between efficient light harvesting and photoprotection
Oncological and Functional Outcomes of Radical Cystectomy and Orthotopic Bladder Replacement in Women. Editorial comment
No full textDuring the last decades, orthotopic bladder substitution (OBS) after radical cystectomy for bladder cancer in women has been increasingly proposed. Meanwhile, strict patient selection criteria, improved surgical techniques, long-term follow-up in large patient cohorts, and validated evaluation have defined the role of OBS in men. Several issues must be clarified in women: oncological outcome, complication rates, functional results, quality of life, and sexual function. As a matter of fact, the results of OBS in women are substantially unchanged in the last decade as stated in this paper.
From the oncological standpoint, the patient outcome seems objectively satisfactory but selection criteria are different in the published series. Fortunately, the problem of urethra recurrence seems less relevant in properly selected patients.
However several issues are still a matter of debate. Functional results in terms of continence and hypercontinence are still unsatisfactory because the optimal way to reconstruct the pelvic anatomy is still undefined. Early and late complication rates are poorly evaluated. Little data are also available about the quality of life and sexual function.
Validated evaluation criteria in a large patient cohort are needed to objectively evaluate the results and to improve the substantially unchanged results reported in last decade. It's time to move forward!!
- …
