Close second part of issue statsmodels#1720

kshedden · Jun 3, 2014 · a9d495b · a9d495b
1 parent 1ac5ecf
commit a9d495b
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/statsmodels/genmod/generalized_linear_model.py b/statsmodels/genmod/generalized_linear_model.py
@@ -427,9 +427,9 @@ def fit(self, start_params=None, maxiter=100, method='IRLS', tol=1e-8,
         # exposure has already been logged if present.
         offset = 0.
         if hasattr(self, 'offset'):
-            offset = self.offset.copy()
+            offset = self.offset
         if hasattr(self, 'exposure'):
-            offset += self.exposure
+            offset = offset + self.exposure
 
         wlsexog = self.exog
         if start_params is None: