Merge pull request #23 from Tanmay-Kulkarni101/master

fix import statement in Parametric DGP Section

docs/usage.rst

@@ -414,7 +414,7 @@ Covariates
 """"""""""
 We simply access the covariates with::
 
- >>> from justcause.data.sets import get_ihdp_covariates
+ >>> from justcause.data.sets.ihdp import get_ihdp_covariates
 
  >>> covariates = get_ihdp_covariates()
  >>> covariates.shape
@@ -521,4 +521,4 @@ We encourage users of JustCause to start their considerations with the terminolo
 .. _Fundamental Problem of Causal Inference: https://thuijskens.github.io/2016/08/25/causal-modelling/
 .. _[1]: https://arxiv.org/pdf/1810.13237.pdf
 .. _JustCause Data Repository: https://github.com/inovex/justcause-data/
-.. _RLearner Paper: https://arxiv.org/abs/1712.04912
+.. _RLearner Paper: https://arxiv.org/abs/1712.04912