There are techniques regime switching and indicator functions that can handle exactly this type of interaction in a linear model. https://en.wikipedia.org/wiki

There are techniques regime switching and indicator functions that can handle exactly this type of interaction in a linear model. https://en.wikipedia.org/wiki/Dummy_variable_(statistics) https://en.wikipedia.org/wiki/Dummy_variable_(statistics) https://en.wikipedia.org/wiki/Interaction_(statistics) https://en.wikipedia.org/wiki/Interaction_(statistics)