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Correct prescription writing habits could have a great influence on the fate of drug therapy as well as the health of patients. One of the major types of errors in prescriptions is the "errors of commission". In this study attempts were made to examine 519 prescriptions of the internal ward of Ayatollah Taleghani teaching hospital over a period of 3 months in terms of the nature and extent of t...

Ridge estimate has been suggested as an alternative to the maximum likelihood estimate in the presence of collinearity among the elements of unobservable values in measurement error models. This paper studies the local influence of minor perturbations on the ridge estimate in the measurement error model. The diagnostics under the perturbation of variance and explanatory variables are considered...

This is the ninth edition of this world-famous textbook of ophthalmology and the appearance of a new edition after a lapse of only two years is sufficient proof of its popularity. The book is divided into eight sections which consist of the anatomy and physiology, the examination of the eye, diseases of the eye, errors of refraction and anomalies of accommodation, disorders of motility of the e...

Measurement errors are often correlated, as in surveys where respondent’s biases or tendencies to err affect multiple reported variables. We extend Schennach (2007) to identify moments of the conditional distribution of a true Y given a true X when both are measured with error, the measurement errors in Y and X are correlated, and the true unknown model of Y given X has nonseparable model error...

In a nonparametric setup involving stochastic regressors. regression quantiles relate to the so called conditional quantile functions. Various asymptotic properties of such conditional quantile processes are studied with due emphasis on the underlying design aspects.

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