Parametric and partially linear regressions for agricultural economy data

We propose two new regressions, one parametric and other partially linear based on an extended Birnbaum–Saunders distribution. This distribution includes, as special cases, the exponentiated Birnbaum–Saunders, odd log-logistic Birnbaum–Saunders and Birnbaum–Saunders distributions. Several mathematical properties are presented. We adopt the maximum likelihood method to estimate the parameters of the parametric regression model and the penalized …