The xls file "patent_with_improvements_in_yield" includes the following variables:
- Patent #: US patent number
- Hybrid name: Name of the protected hybrid (product name or development code)
- Citations: Measures the sum of forward citations to a patent - hybrid pair
- Year of application: Year of the patent application (1985 + t)
- Yield: Measures the improvement in yields (in percent) over existing hybrids. In case of multiple comparisons in the patent, we selected the highest-yielding comparison hybrid.
- Moisture: Moisture measures the water content of a corn hybrid at harvest relative to the highest-yielding comparison hybrid.
