/usr/local/lib/python2.7/dist-packages

sudo python setup.py install

import statsmodels.api as sm

Traceback (most recent call last):
  File "/home/Astrophysics/Histogram_Fast.py", line 6, in <module>
import statsmodels.api as sm
ImportError: No module named statsmodels.api

/usr/local/lib/python2.7/dist-packages

numpy 1.6

$ python -mpip install statsmodels

pip install --upgrade patsy

pip install statsmodels