Comment: j is used instead of i in certain contexts -- e.g. circuits -- when it is possible to confuse it with the current (same letter used). As e.g. an Electrical and Computer Engineer you just move back and forth on sqrt(-1) notation appropriately. Not sure beyond that about the not quite the same terminology -- not my experience but who knows.
The article is kind of a "layman's article" to put it politely. I am erring towards the side of hocus pocus -- if economics were that well behaving and linear and composable as the author models, it would be a solved field years now. And control theory wouldn't exist as a field for 50 years, as it would have been solved. Do the components diverge? Where in the complex plane are they defined to begin with? Anyways.
Also: if you should learn something: Central Banks have a terrible track record, and despite what they keep saying are political. The joke is that they are the blind driver with a gas and break pedal that have a 2 years delay. So good luck to us all.
The article is kind of a "layman's article" to put it politely. I am erring towards the side of hocus pocus -- if economics were that well behaving and linear and composable as the author models, it would be a solved field years now. And control theory wouldn't exist as a field for 50 years, as it would have been solved. Do the components diverge? Where in the complex plane are they defined to begin with? Anyways.
Also: if you should learn something: Central Banks have a terrible track record, and despite what they keep saying are political. The joke is that they are the blind driver with a gas and break pedal that have a 2 years delay. So good luck to us all.