This presentation will describe a protocol we have developed for teaching students conducting empirical research to document their work in such a way that their results are completely reproducible and verifiable. The protocol is comprised primarily of creating and assembling a collection of...

In this presentation, we present a procedure and an illustrative application of user-written mathematical optimization programs-Linear Programming(LP) and Mixed Integer Linear Programming(MILP). The LP and MILP programs in Stata will allow researchers to easily access the Stata system and to...

GPS coordinates are collected by many organizations, however in order to derive any meaningful statistical analysis from these coordinates they need to be joined with geographical data. Previously users were required to export the GPS data out of Stata and into a GIS mapping program to map the...

When estimating discrete choice models, the mixed logit approach is commonly superior to simple conditional logit setups. Mixed logit models not only allow the researcher to implement difficult random components but also overcome the restrictive IIA assumption. Despite these theoretical...

At last year’s Stata Conference, I presented some ideas for combining Stata and Python within a single interface. Two methods were presented; in one, Python was used to automate Stata, and in the other, Python was used to send simulated keystrokes to the Stata GUI. The first method has the...

This presentation provides a Stata application for the estimation of Blundell, Banks and Lewbel’s (1997) demand system, dealing with the zero problem which is in the heart of many expenditure survey analysis. Starting from Poi’s (2008) routine, our main contribution is the multivariate...

Even if assignment of treatment is purely exogenous, estimating treatment effects may suffer from severe bias if the available sample is subject to nonrandom sample selection/attrition. Lee (Review of Economic Studies, 2009) addresses this issue by proposing an estimator for treatment effect...

In this talk, we will show how to use simulations in Stata to explore to what extent and under what circumstances a test is problematic. We will illustrate this for a set of tests of the parallel regression assumption in ordered logit and probit models: the Brant, likelihood ratio, Wald, score,...

Complex statistical tables often must be built up by parts from the results of multiple Stata commands. I show the capabilities of frmttable and outreg for creating complex tables, and even fully formatted statistical appendices, for Word and TeX documents. Precise formatting of these tables...

The National Educational Panel Study (NEPS) is rising as one of Germany's major publisher of scientific use data for educational research. Disseminating data from six panel cohorts makes not only structured data editing but also documentation and user support a major challenge. In order to...