Standardized pandas/numpy conversions
Minor formatting and comment changes
Pulled ordinal-specific code out of GEE class into helper functions
Many lint fixes
Many pylint fixes to varstrut.py
Switched scipy optimize functions
Added simulation-based tests of nested and AR covariance structures
added multinomial logit; eliminated cycles; other refactoring and cleanup
remove renamed file
Refactored simulation check scripts
Added Mancel DeRouen robust sandwich estimate of standard errors
Added marginal effect estimates to GEE; seems to work but minimal test coverage
Set simulation tests to run under main
Forgot to push this file
Improved reporting of convergence troubles
Refactor ordinal/nominal setup code for ease of use
Refactor ordinal/nominal setup code for ease of use
Add missing test dataset
Fixed error in naive covariance calculation.
reuse cholesky factors in fit