Stata provides a fairly extensive set of graphs. However sometimes users need to implement custom graphs, which are not yet available. In some cases it is possible to “tweak” a standard graph so that it results in the desired image; in other cases it is not possible. Stata uses complex system...

New command USESPSS allows to open and process SPSS system files in Stata for Windows. USESPSS is a "true reader" in the sense that it is completely independent from any specialized conversion software like Stat/Transfer or DBMS/Copy and does not require SPSS program to be installed. USESPSS...

Hierarchical datasets are commonly a product of the popular CSPro system developed by the U.S. Census Bureau. CSPro became widely popular and a de facto standard for data collection in many countries; some agencies supply data exclusively in CSPro format. While CSPro can export the data into...

A number of complex tasks frequently challenge the computational resources in the areas of simulation modeling and estimation. Often these tasks have a distinct number of separable iterations that can be performed in parallel simultaneously and independently from each other. Earlier approaches...

Open-ended questions can be a nightmare for statistical processing. Any mistake in spelling can result in a mismatch during merging, or multiple counting of the same object. For example, the answers to the "place-of-birth" question might be "Chicago" and "San Francisco", but in practice they are...