@article{duggan_garthwaite_goyal_2016, 
  title={The Market Impacts of Pharmaceutical Product Patents in Developing Countries: Evidence from India}, 
  volume={106}, 
  DOI={10.1257/aer.20141301}, 
  publisher={American Economic Association}, 
  author={Duggan and Garthwaite and Goyal}, 
  year={2016}
  }