Relative Bioefficiency via Simultaneous Regressions R package BIOEFIC version 0.1.1 Fits simultaneous regression models to compare two sources (reference and test) and estimates relative bioefficiency. Includes simultaneous exponential model with common asymptote (model = 1), slope-ratio model (model = 2), quadratic model (model = 3), linear-response plateau model (model = 4), and Michaelis-Menten model (model = 5). Output style follows the 'easyreg' package. Methods are based on Finney (1978, ISBN:0-85264-252-0), Mercer et al. (1978) <doi:10.1093/jn/108.8.1244>, Robbins et al. (1979) <doi:10.1093/jn/109.10.1710>, Noll et al. (1984) <doi:10.3382/ps.0632458>, Gallant and Fuller (1973) <doi:10.1080/01621459.1973.10481356>, Littell et al. (1997) <doi:10.2527/1997.75102672x>, and Burnham and Anderson (2002, ISBN:978-0-387-95364-9). Software Imports: ggplot2, minpack.lm, stats Suggests: knitr, rmarkdown Michel Blezins de Arruda <michel_blezins@yahoo.com.br> Comprehensive R Archive Network (CRAN) Michel Blezins de Arruda [aut, cre] (ORCID: <https://orcid.org/0009-0003-1192-820X>) MIT + file LICENSE (https://CRAN.R-project.org/package=BIOEFIC/LICENSE) 2026-05-27 application/tgz https://CRAN.R-project.org/package=BIOEFIC doi:10.32614/CRAN.package.BIOEFIC en-US