Now, this is an odd thing. If my personal economy grows by zero from one year to the next (zero corrected for inflation, of course) it means my living standard doesn't change. Big deal; I have lived through many such years. On the other hand, if the _national_ economy experiences zero growth, dire suffering and disorder results. Or at least people get very depressed about it. This difference strikes me as odd. I'm sure there's some simple explanation.