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update 25feb2008 ------------------------------------------------------------------------------------------------- -
Ado-files
1. bootstrap has the new jackknifeopts() option for passing options to jackknife when the bca option is specified.
2. The documentation for glm and binreg did not mention that the constraints() option was allowed when fitting models
using ml optimization. The help files and dialogs have been updated.
3. glm, when used with the binomial family and either the log or identity link, sometimes issued a spurious warning
message regarding inadmissible predictions. This has been fixed.
4. When using a saved scatterplot matrix that was created using the by() option and that had previously been edited
with the Graph Editor, Observation Property edits might be ignored for some observations. This has been fixed.
5. The Y axis tab has been removed from the dialog box for graph pie.
6. kdensity displayed a bandwidth of zero on the graph even though the bandwidth was not exactly zero. kdensity now
displays more significant digits for the bandwidth in the resulting graph.
7. notes did not attach notes to a variable name with exactly 32 characters. This has been fixed.
8. predict with the scores option after mlogit was displaying an error when specifying the correct number of
variables. This has been fixed.
9. predict with the scores option after ologit and oprobit produced incorrect equation-level score values when the
estimation results were computed under version control less than 9. This affected the standard errors produced by
svy: ologit and svy: oprobit when they were called under version control less than 9. This has been fixed.
10. ssc whatsnew and ssc whatshot have been renamed ssc new and ssc hot. The old subcommand names continue to work
but are undocumented.
11. The following changes are made to sts graph and stcurve for kernel-based hazard estimation (when option hazard is
used).
A. The use of the boundary-adjusted kernel functions epan2, biweight, or rectangular can sometimes lead to
negative estimates of the hazard function. In such cases, the negative hazard estimates are replaced with 0.
B. When a hazard estimation grid included a time point equal to the value of a bandwidth, the hazard estimates
obtained using an epan2, biweight, or rectangular kernel were incorrectly shifted by one time point in the
right boundary region. This could result in a slightly different curve being displayed in the right boundary
region with these kernels. This has been fixed.
C. The left boundary region is changed to be the region [L,L+h) instead of the old region [0,h). Here L is the
minimum analysis time at which failure occurred, and h is the bandwidth. As such, the default plotting range
is restricted to [L,R] (R is the observed maximum failure time) for the epan2, biweight, and rectangular
kernels. For other available kernels, the default plotting range is [L+h,R-h].
12. svy results will now report the population and subpopulation sizes out to a larger number of significant digits,
reserving scientific notation for sizes greater than 99 trillion.
13. svy: tabulate twoway, when used with data that contained a stratum with a single sampling unit, would report
zero-valued test statistics (with p-values of 1) when it should have reported missing values. This has been
fixed.
14. svy: tabulate twoway now recognizes value labels assigned to extended missing values.
15. svyset would not check for invalid syntax beyond the stage that contained an fpc() option. This has been fixed.
16. The dialog box for xtabond did not allow vce(robust) to be specified with the twostep option. This has been
fixed.
17. xtgee terminated with error 198, Unable to identify sample, if pweights were used with the noconstant option.
This has been fixed.
18. xtgee did not properly mark the estimation sample (contained in e(sample)) when using the autoregressive,
stationary, and nonstationary correlation structures, and observations were dropped because they did not have
equally spaced time intervals. This has been fixed.
19. xtmixed, xtmelogit, and xtmepoisson now support time-series operators.
20. xtreg, fe now uses vce(cluster id) when vce(robust) is specified, in light of the new results in Stock and Watson,
"Heteroskedasticity-robust standard errors for fixed-effects panel-data regression," Econometrica 76 (2008):
155-174.
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