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 converts data files on-the-fly, preserving variable and value labels and missing values. Similarly to other conversion software USESPSS optimizes data storage types looking for the most efficient way to store SPSS data in Stata's memory. USESPSS is implemented as a plugin and works in Windows 32-bit environment (however it understands SPSS files originating from both Windows and Unix platforms, compressed and not compressed). The critical portions of its code are written in assembly language, thus SPSS data can be used in Stata programs without a significant loss of performance. In part the talk will describe the process of developing plugins for Stata. The USESPSS command is available from the SSC Archive via -ssc install usespss- (32-bit Windows only).
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