The aim of the Data Extra section is to make it easier to work with the data. Under Reading Recommendations in the left hand column we gather articles on the use of time-series data as the methods required differs somewhat from the methods used when dealing with cross-sectional data.
Also we have added a section aimed at Stata users. Stata is in no way the only software that works with the QoG datasets, can be used with more or less any program that uses .csv, .dta or .sav formats and we can probably assist you should you require another format. However the QoG data management group mostly use Stata and it is only Stata that has commands specifically written for the QoG datasets