I’d be interested in seeing these metrics and how they quantify living standards. Does living standard mean “keeps pace with the average <standard> at a given t

I’d be interested in seeing these metrics and how they quantify living standards. Does living standard mean “keeps pace with the average <standard> at a given time” or does it mean “given a specific objective <standard>“? For example, when I was a kid having cable television went from not standard when I was in elementary school to standard by the time I entered high school. Similarly: internet access, cell phones, having a computer, having a laptop, etc. This was true even outside of tech: having more than one car, having central air AC, having your own bedroom, taking the bus to school or being driven, and even having a bike evolved as I grew up.