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279Economics combines characteristics of the other two areas: at the same time that,because of its political component, it is not an “exact” natural science such as chemistry,it seeks to attain the status of rigorous “scientific” discipline through the uniformemphasis on the adoption of models to study disciplinary problems.The ways reviewers in different disciplines provide ‘warrants’ (Toulmin, 1958) fortheir evaluations and what in fact can serve as grounds for evaluation across disciplinesproved to be an interesting indicator of the epistemological organization and valuesunderlying disciplinary fields. There are at least three terms that can be selected as mostcommonly cited in each discipline. For chemistry, Up-to-date, Comprehensive, andUseful. For linguistics, Clear, Testable and Well-defined. And Persuasive, Original, andPleasant to read for economics. The evaluation style of reviewers in the threedisciplines varies from a lighter and more objective evaluative practice in chemistry, to amore explicit and personal evaluation style in economics. In linguistics, reviewers veryoften produce a critique of the professional procedures used in developing the researchin the book. In economics, reviewers develop a more holistic argument in which theyreinterpret the knowledge produced in the book. Chemistry reviewers are usuallyconcerned about the amount and depth of information contained in a book, reporting onthe contents the author chose to include in the book and taking for granted theprofessional procedures adopted.Knowledge structure could be perceived as different in the corpus in that chemistsseem to have a broader range of tacit knowledge than economists and even broader thanlinguists. It can be argued that evidence for that is the fact that, while in chemistry,