1,721,037 research outputs found
Algebraic generation of Orthogonal Fractional Factorial Designs
No full textThe joint use of counting functions, Hilbert basis and Markov basis allows us to define a procedure to generate all the fractional factorial designs that satisfy a given set of constraints in terms of orthogonality (Fontana, Pistone and Rogantin (JSPI,2000), Pistone and Rogantin (JSPI, 2008)). The general case of mixed level designs, without restrictions on the number of levels of each factor (such as power of prime number) is studied. The generation problem is reduced to finding positive integer solutions of a linear system of equations (e.g. Carlini and Pistone (JSTP, 2007)). This new methodology has been experimented on some significant classes of fractional factorial designs, including mixed level orthogonal arrays and sudoku designs (Fontana and Rogantin in Algebraic and Geometric Methods in Statistics, CUP (2009)). For smaller cases the complete generating set of all the solutions can be computed. For larger cases we resort to the random generation of a sample solutio
Anticipating Italian census tourism data before their official release: a first solution and implementation to Piemonte, Italy
No full textTourism is a complex and highly competitive sector. In this scenario, incoming tourism flows represent one of the key indicators for public institutions, willing to adopt an informed decision making process for resource allocation. The accurate and timely knowledge of both the inter-regional and the foreign component at a sufficiently detailed geographical level of such flows allows a better strategical, tactical and operational planning of marketing activities. The paper describes a methodology to complete the database of the official statistical data on tourism flows with an estimate of missing data, which are originated by non-respondent accommodation structure. The methodology has been applied to the inbound tourism flows into Piemonte, Ital
Flussi turistici in Piemonte: prime valutazioni degli eventi con i dati giornalieri dei flussi turistici nel 2008
Full text linkPiemonte e Turismo - Scenari Internazionali, trend dei mercati e prodotti turistici piemontes
An Infinite Dimensional Geometric Structure On the Space of all the Probability Measures Equivalent to a Given One
No full textTHE ANNALS OF STATISTIC
Detection of high impact tourist events in Piemonte region, Italy
No full textTourism is a complex and highly competitive sector. In Italy, public institutions play a crucial role in supporting events that can increase tourism flows. The current world economic crisis makes even more necessary than in the past to adopt an informed decision making process for resource allocation. The statistical methodology that is described in this paper analyses daily tourism flows in Piemonte as collected by the Italian National Institute of Statistics, ISTAT, under the ‘Occupancy in collective accommodation establishments” census. The days of the year in which the registered bednights are expected to be strongly correlated with events like public holidays, commercial fairs and sport competitions are identified. A fully unsupervised methodology for Piemonte Region (Italy) tourism events detection has been developed and implemented using SAS Forecast Server. The methodology can be transferred, without any modification, to any of the 20 Italian Regions
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