Frequently Asked Questions
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data stat
231.
Two-stage least-squares regression Must I use all of my exogenous variables as instruments when estimating instrumental variables
regression?
232.
Checking a variable for a range of ICD codes How do I check a variable for a range of diagnosis or procedure codes?
233.
Learning about Stata How can I learn more about Stata?
234.
Maximum likelihood estimation with vce(cluster clustvar) Are the estimates produced by probit and logit with the vce(cluster clustvar) option true maximum
likelihood estimates?
235.
Estimation commands and omitted variables Why do estimation commands sometimes omit variables?
236.
Marginal effects after estimations with offsets I am using mfx after an estimation that has an offset. How does mfx take that into account?
237.
Getting nice time-of-day labels on a graph How can I get “nice” time-of-day labels on a graph?
238.
Calculating percentile ranks or plotting positions How can I calculate percentile ranks?
239.
Interpreting coefficients when interactions are in your model Why do I see different p-values, etc., when I change the base level for a factor in my regression?
240.
Instrumental variables for triangular/recursive systems with correlated disturbances How do I estimate recursive systems using a subset of available instruments?
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