Introducing Stata Tips

Twelve tips for introducing E-Portfolios with undergraduate students.

There is no standard definition of an E-Portfolio just as there is no standard E-Portfolio (Madden 2007). E-Portfolios can be described in many ways, such as ‘an archive of material, relating to an individual, held in a digital format’ (Madden 2007, p 5). E-Portfolios have a range of purposes which include personal development planning, showcasing work, reflection and assessment (Stefani et al....

Robust Regression in Stata

In regression analysis, the presence of outliers in the data set can strongly distort the classical least squares estimator and lead to unreliable results. To deal with this, several robust-to-outliers methods have been proposed in the statistical literature. In Stata, some of these methods are available through the commands rreg and qreg. Unfortunately, these methods only resist to some specif...

Speaking Stata: Graphing distributions

Graphing univariate distributions is central to both statistical graphics, in general, and Stata’s graphics, in particular. Now that Stata 8 is out, a review of official and user-written commands is timely. The emphasis here is on going beyond what is obviously and readily available, with pointers to minor and major trickery and various user-written commands. For plotting histogram-like display...

Stata Time-series Reference Manual

Implementing intersection bounds in Stata

We present the clrbound, clr2bound, clr3bound, and clrtest commands for estimation and inference on intersection bounds as developed by Chernozhukov et al. (2013). The commands clrbound, clr2bound, and clr3bound provide bound estimates that can be used directly for estimation or to construct asymptotically valid confidence sets. The command clrbound provides bound estimates for one-sided lower ...