Stata 7, the latest version of the statistical-analysis package, is shipping.

Stata 7 has statistical, graphical and data-management capabilities.

This latest version includes 91 new commands. Stata Statistical, the software's publisher, claims every aspect of Stata has been changed from statistics to programming language, to the way output is displayed. There is a new bottom layer on which future graphics will be developed.

Other new features include survival analysis; parametric models with frailty/heterogeneity; parametric models with stratification; panel data; and instrumental variable random- and fixed-effects regression.

Until 28 February single-user upgrades cost $299 while academic and business upgrades cost $349. After this an academic upgrade is $325 and a business upgrade will cost $375. UK pricing is unavailable at this time.