Wikireadia.org is a free ISBN lookup site. Use the ISBN search options for finding books by ISBN, title, author, and publisher. Amazon book reviews, Amazon pricing, Amazon product description, Amazon ASIN number, and links to Amazon editorial reviews, and Amazon customer reviews and AbeBooks pricing are also displayed. Use the Amazon data to find and compare prices on new books, used books, new college textbooks, and used college textbooks. All sorts of books are listed on the site - new books, used books, new and used textbooks, new and used college textbooks, discountinued books, discounted books, out of print books, rare books, cheap books, children's books, young adults books, adult books, antique books, hard to find books, and old books.
Over 6 million ISBNs and ISBN barcodes are listed. The ISBN format was created by the International Organization for Standardization (ISO). ISBNs are 10 or 13 digit numbers that uniquely identify a book by its title, publisher, and format. ISBN bar codes are just a bar code display of the ISBN number. ISBNs were introduced in 1970 and were originally 10 digit numbers. In 2007, ISBN numbers changed to 13 digit numbers so the system wouldn't run out of ISBN numbers to assign. The ISBN number is typically found on the back cover of the book along with the ISBN barcode that represents that number. The ISBN number can also typically be found on one of the first few pages of the book where the publisher and copyright information is listed.
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Title: Modeling the Demand for Cocaine
Author: S. M.S. Everingham
Author2: C. P. Rydell
Publisher: RAND Corporation
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This report documents the development of a two-state Markovian model of the demand for cocaine and includes the estimation of incidence, prevalence, cohort retention, and consumption. The Markovian model is required to fit (1) the overall prevalence data; (2) the fraction of all users who are heavy users in 1985, 1988, and 1990; and (3) the fraction of a cohort of initiates that is still using drugs ten years later, the ten-year cohort retention rate. The study states that the incidence of new users into light cocaine use has varied greatly over the years and is an input to the model; however, the model cannot predict future prevalence--it can only project prevalence given a hypothetical incidence scenario. The model also demonstrates that the fraction of all cocaine users who are heavy users has varied greatly over time, and that peak heavy usage followed peak incidence by about ten years. Consequently, the effect on heavy usage of government programs that reduce incidence (such as prevention programs) will only be realized many years later.