The Confidence Ellipses in Multiple Non-Symmetrical Correspondence Analysis for the Evaluation of the Innovative Performance of the manufacturing enterprises in Campania - Anna Crisci, Antonello D'Ambra - Vita e Pensiero - Articolo Vita e Pensiero

The Confidence Ellipses in Multiple Non-Symmetrical Correspondence Analysis for the Evaluation of the Innovative Performance of the manufacturing enterprises in Campania

Gratis
digital
The Confidence Ellipses in Multiple Non-Symmetrical Correspondence Analysis for the Evaluation of the Innovative Performance of the manufacturing enterprises in Campania
Articolo
Rivista STATISTICA & APPLICAZIONI
Fascicolo STATISTICA & APPLICAZIONI - 2011 - 2
Titolo The Confidence Ellipses in Multiple Non-Symmetrical Correspondence Analysis for the Evaluation of the Innovative Performance of the manufacturing enterprises in Campania
Autori ,
Editore Vita e Pensiero
Formato Articolo | Pdf
Online da 03-2011
Issn 1824-6672 (stampa) | 2283-6659 (digitale)
Scrivi un commento per questo prodotto
Promozione valida fino al 02/12/2023
Scarica

Ebook in formato Pdf leggibile su questi device:

Non-Symmetric Correspondence Analysis-NSCA (D’Ambra and Lauro, 1989) is a useful technique for analyzing a two-way contingency table. There are many real-life applications where it is not appropriate to perform classical correspondence analysis because of the obvious asymmetry of the association between the variables. The key difference between the symmetrical and non-symmetrical versions of correspondence analysis rests on the measure of the association used to quantify the relationship between the variables. For a two-way, or multi-way, contingency table, the Pearson chisquared statistic is commonly used when it can be assumed that the categorical variables are symmetrically related. However, for a two-way table, it may be that one variable can be treated as a predictor variable and the second variable can be considered as a response variable. Yet, for such a variable structure, the Pearson chi-squared statistic is not an appropriate measure of the association. Instead, one may consider the Goodman-Kruskal tau index. In the case that there are more than two cross-classified variables, multivariate versions of the Goodman-Kruskal tau index can be considered. These include Marcotorchino’s index (Marcotorchino, 1985) and Gray-Williams’ index (Gray and Williams, 1975). In the present paper, the Multiple non- Symmetric Correspondence Analysis- MNSCA (Gray and Williams, J. S,1975), is used for the evaluation of the innovative performance of the manufacturing enterprises in Campania. Innovation represents a very important element for the competition of the enterprises and economic growth. Only the enterprises which are able to innovate regularly can have at their disposal a range of more and more appealing products for the customers. Moreover, only a constant innovation provides the constant efficiency of the processes and the optimization of the production costs. Finally, the use of the ellipse confidence has allowed to identify a category which is statistically significant.

Keywords: CATANOVA, Confidence Ellipse, Gray-Williams Multiple Tau Index, Multiple Non Symmetrical Correspondence Analysis

News

16.11.2022
Onorevole ministra: la presentazione a Roma
Il 2 dicembre la presentazione del libro di Walter Ricciardi.
14.11.2022
Cristianesimo: il coraggio di cambiare, con Halík
Tour italiano del teologo ceco autore di "Pomeriggio del cristianesimo", da Milano a Roma (dal 29 novembre al 2 dicembre).
08.11.2022
La ricetta perfetta per un Natale di libri
Cosa non può mancare in una ricetta natalizia? Zucchero? Farina? Cannella? Per noi non possono mancare i libri! Seguendo la nostra ricetta letteraria, troverai gli ingredienti segreti per una lettura o un regalo speciale.
03.11.2022
Il cristianesimo di Bontadini a Bari e Perugia
Le due presentazioni del volume di Leonardo Messinese "Il filosofo e la fede. Il cristianesimo 'moderno' di Gustavo Bontadini.

Newsletter

* campi obbligatori

Collane

  • Cultura e storia
  • Filosofia morale
  • Grani di senape
  • Le nuove bussole
  • Metafisica e storia della metafisica
  • Pagine prime
  • Punti
  • Relazioni internazionali e scienza politica.ASERI
  • Sestante
  • Studi interdisciplinari sulla famiglia
  • Temi metafisici e problemi del pensiero antico
  • Transizioni
  • Varia. Saggistica
  • Scopri le altre Collane

Inserire il codice per attivare il servizio.