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From correspondence analysis to multiple and joint correspondence analysis
Get PDFThe generalization of simple (two-variable) correspondence analysis to more than two categorical variables, commonly referred to as multiple correspondence analysis, is neither obvious nor well-defined. We present two alternative ways of generalizing correspondence analysis, one based on the quantification of the variables and intercorrelation relationships, and the other based on the geometric ideas of simple correspondence analysis. We propose a version of multiple correspondence analysis, with adjusted principal inertias, as the method of choice for the geometric definition, since it contains simple correspondence analysis as an exact special case, which is not the situation of the standard generalizations. We also clarify the issue of supplementary point representation and the properties of joint correspondence analysis, a method that visualizes all two-way relationships between the variables. The methodology is illustrated using data on attitudes to science from the International Social Survey Program on Environment in 1993.Correspondence analysis, eigendecomposition, joint correspondence analysis, multivariate categorical data, questionnaire data, singular value decomposition
Canonical correspondence analysis in social science research
Get PDFThe use of simple and multiple correspondence analysis is well-established in social science research for understanding relationships between two or more categorical variables. By contrast, canonical correspondence analysis, which is a correspondence analysis with linear restrictions on the solution, has become one of the most popular multivariate techniques in ecological research. Multivariate ecological data typically consist of frequencies of observed species across a set of sampling locations, as well as a set of observed environmental variables at the same locations. In this context the principal dimensions of the biological variables are sought in a space that is constrained to be related to the environmental variables. This restricted form of correspondence analysis has many uses in social science research as well, as is demonstrated in this paper. We first illustrate the result that canonical correspondence analysis of an indicator matrix, restricted to be related an external categorical variable, reduces to a simple correspondence analysis of a set of concatenated (or “stacked”) tables. Then we show how canonical correspondence analysis can be used to focus on, or partial out, a particular set of response categories in sample survey data. For example, the method can be used to partial out the influence of missing responses, which usually dominate the results of a multiple correspondence analysis.Constraints, correspondence analysis, missing data, multiple correspondence
File 2: Correspondence
Get PDFConsists of the correspondence of the Osoyoos Centennial Committee, 1971
File 1: Correspondence
Get PDFConsists of the correspondence of the Osoyoos Centennial Committee, 1969-1970
File 2: Correspondence
Get PDFCorrespondence of the collector of customs at Osoyoos Custom House from 1908-1909
ACTU Correspondence, 1979 (3) [Folder Title]
No full textThis folder contains correspondence sent to the Australian Council of Trade Unions (ACTU) from various individuals and community organisations seeking assistance, asking for advice, responding to media reports and offering support. The correspondence covers a range of matters for which people would seek assistance from the trade union peak body including asking for financial support for their organisation and expressing opinions on government legislation. Additional issues addressed here include uranium mining, unemployment, wage indexation, superannuation and indigenous affairs.
ACTU correspondence, 1976 (2) [Folder Title]
No full textThis folder contains correspondence sent to the Australian Council of Trade Unions (ACTU) from various individuals and community organisations seeking assistance, asking for advice, responding to media reports and offering support. The correspondence covers a range of matters for which people would seek assistance from the trade union peak body including asking for financial support for their organisation and expressing opinions on government legislation. Additional issues addressed here include industrial disputes, unemployment, East Timor, Medibank, uranium mining, pensions and pollution.
ACTU correspondence, 1976 (3) [Folder Title]
No full textThis folder contains correspondence sent to the Australian Council of Trade Unions (ACTU) from various individuals and community organisations seeking assistance, asking for advice, responding to media reports and offering support. The correspondence covers a range of matters for which people would seek assistance from the trade union peak body including asking for financial support for their organisation and expressing opinions on government legislation. Additional issues addressed here include taxation, unemployment, immigration, industrial disputes and indigenous affairs.
ACTU correspondence, 1977 (3) [Folder Title]
No full textThis folder contains correspondence sent to the Australian Council of Trade Unions (ACTU) from various individuals and community organisations seeking assistance, asking for advice, responding to media reports and offering support. The correspondence covers a range of matters for which people would seek assistance from the trade union peak body including asking for financial support for their organisation and expressing opinions on government legislation. Additional issues addressed here include pensions, religion, unemployment, taxation and wages.
ACTU correspondence, December 1979 [Folder Title]
No full textThis folder contains correspondence sent to the Australian Council of Trade Unions (ACTU) from various individuals and community organisations seeking assistance, asking for advice, responding to media reports and offering support. The correspondence covers a range of matters for which people would seek assistance from the trade union peak body including asking for financial support for their organisation and expressing opinions on government legislation. Some of the correspondence is congratulating Bob Hawke on deciding to enter parliament. Additional issues addressed here include indigenous affairs, arts funding, superannuation, industrial disputes and alternative communities. The first three issues of the Down to Earth newsletter from 1979, produced by the Down to Earth Association (ACT) are included here.
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