International Centre for Cruise Research
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Swain, R. A.and Barth, J. E.  "An analysis of cruise ship rating guides," International Journal of Hospitality & Tourism Administration, 2002, 3:4, 43-60

An introduction to the cruise industry is followed by an analysis of cruise guides worldwide with star ratings, which are widely available in bookstores and libraries. Data are obtained from 214 ocean-going cruise ships. A linear regression of the star ratings for each of four popular guides shows that as much as 70% of the ratings are explained by only two variables (year of launch and space or passenger ratio). It was found that consumers who wish to compare ships efficiently could do so by simply dividing the space or passenger ratio by 10.