Linear models are a linear combination of possibly non-linear regressors. The linearity is strictly in the parameters, not in whatever you're adding up. A neur

Linear models are a linear combination of possibly non-linear regressors. The linearity is strictly in the parameters, not in whatever you're adding up. A neural network can be pedantically referred to as a linear model of the form y = a + b*neural_network, for example. Here, y is a linear model (even though neural_network isn't).