Zero-Modified Complex 'Tri-Parametric' Pearson Distribution for Overdispersed Count Data // Implements zero-modified versions of the Complex 'Tri-Parametric' Pearson distribution for overdispersed count data. The package addresses limitations of existing implementations when the parameter b approaches zero. It provides distribution functions, maximum likelihood estimation, and diagnostic tools for modeling count data with excess zeros. The methodology is based on 'Rodriguez-Avi' and coauthors (2003) doi:10.1007/s00362-002-0134-7.