The program adoinf.ado is useful for an overview of your ado-files in your site or personal directory. If the number of ado-files grows you easily forget the meaning of certain ado-files and whether they are still necessary or not. You also easily forget which subroutines are used in a file...

With the release of Stata 7, the capabilities of glm were greatly enhanced. Among the improvements was the ability for users to program their own custom link and variance functions. Whereas previously glm was used primarily as a platform on which to compare the results of standard regression...

Classification and Regression Tree analysis can be applied for the identification and assessment of prognostic factors in clinical research. It involves repeated subdivisions of a group of subjects on the basis of the choice of optimal cutpoints of binary, ordinal or continuous covariates, that...

Models for handling sample selection or informative missingness have been developed for both cross sectional and longitudinal or panel data. For cross sectional data, Heckman (1979) suggested a joint model for the response and sample selection processes where the disturbances of the processes...

Correct data are crucial for any analysis. E.g. the date of randomization in a clinical trial should never preceed the date of diagnosis, and treatment should always start at the date of randomization or thereafter. You could easily list patients with flaws in the data using: . l patnr ddiag...

Outdat is a Stata program to transfer data from Stata to other statistical packages. Outdat writes data to a disk file in ASCII format and makes a dictionary to read the data into SPSS, Stata or Limdep. The presentation shows how outdat works and how to expand outdat to other data-formats.

Infectious bovine rhinotracheitis is caused by the bovine herpesvirus type 1. It is an enzootic disease on the B List of the Office International des Epizooties (O.I.E.). Programs to eradicate bovine herpesvirus type I have been implemented in several European countries to facilitate the free...

A set of Stata routines to help analysis of `income mobility' are presented and illustrated. Income mobility is taken here as the pattern of income change from one time period to another within an income distribution. Multiple approaches have been advocated to assess the magnitude of income...

In this talk I discuss Pearson's X2 as a measure of goodness of fit for quantal response models, including binary outcome models (logit, probit, gompit), multinomial logistic regression (mlogit) and conditional logistic regression (clogit). Large sample results for X2 have been derived by a.o....

It is commonplace to compute various flavours of residual and predicted values after fitting many different kinds of model. This allows production of a great variety of diagnostic graphics, used to examine the general and specific fit between data and model and to seek possible means of...