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A structuralist approach in the study of evolution and classification
Provedor de dados: 16
Autores: Hammen, L. van der.
A survey is given of structuralism as a method that can be applied in the study of evolution and classification. The results of a structuralist approach are illustrated by examples from the laws underlying numerical changes, from the laws underlying changes in the chelicerate life-cycle, and from the laws underlying the evolution of the chelicerate appendages. Suggestions are given for the study of the laws underlying the transformation of form, and some notes are made on structuring forces and the early stages of organic evolution. Some concluding remarks are finally made on deep structure, phylogenetic classification and evolution.
Tipo: Article / Letter to the editor
Palavras-chave: Appendages; Chelicerata; Classification; Evolution; Increasing complexity; Individual; Laws of form; Life-cycle; Numerical changes; Primordial life; Segmentation; Sexuality; Structuralism; 42.21; 42.70.
Ano: 1985
URL: http://www.repository.naturalis.nl/record/319130

Verbiage Matters: Do Respondents Answer Willingness to Pay Dichotomous Choice Questions on a Per Person or Per Group Basis?
Provedor de dados: 31
Autores: Lohman,   Greta; Keske,   Catherine M.; Loomis,   John B.
Dichotomous choice willingness to pay questions are often used to determine the value visitors place on nature-based recreation.  Ambiguity in wording can result in the use of information that does not necessarily reflect visitors’ true WTP.  For example, depending on the specificity of the verbiage used, respondents may answer questions on a group basis, rather than an individual basis.  To address this issue, experimental surveys were distributed with questions that specifically asked WTP on a per person basis, as compared to control surveys in which the WTP question was more generally worded.  Analyses show WTP responses for either survey type are statistically different, with non-overlapping confidence intervals.  Furthermore, approaches were conducted...
Tipo: Thesis or Dissertation
Palavras-chave: Dichotomous choice; Willingness to pay; Verbiage; Language; Wording; Group; Individual; Community/Rural/Urban Development; Demand and Price Analysis; Environmental Economics and Policy; Land Economics/Use; Public Economics; Research Methods/ Statistical Methods.
Ano: 2010
URL: http://purl.umn.edu/60679