=Types=
'''Theory - (T):'''
''Economic theory papers are largely concerned with the DHCI problem.''
'''Empirical - (E):'''
''Papers that drift towards first including overlapping patents along with DHCI, and then begin abandoning the usage of DCHI.''
'''Discussion - (D):'''
''It seems that economists favor DHCI and overlaps, cite Shapiro (2001) and do more theoretical work; whereas legal scholars favor overlaps, cite Heller and Eisenberg (1998) and provide discussion.'''