Carlini, Enrico; Rapallo, Fabio The geometry of statistical models for two-way contingency tables with fixed odds ratios. (English) Zbl 1112.14318 Rend. Ist. Mat. Univ. Trieste 37, No. 1-2, 71-84 (2005). Summary: We study the geometric structure of the statistical models for two-by-two contingency tables. One or two adds ratios are fixed and the corresponding models are shown to be a portion of a ruled quadratic surface or a segment. Some pointers to the general case of two-way contingency tables are also given and an application to case-control studies is presented. MSC: 14Q99 Computational aspects in algebraic geometry 62H17 Contingency tables Software:SINGULAR; CoCoA PDFBibTeX XMLCite \textit{E. Carlini} and \textit{F. Rapallo}, Rend. Ist. Mat. Univ. Trieste 37, No. 1--2, 71--84 (2005; Zbl 1112.14318) Full Text: arXiv