Again I don't understand your point. Obviously it's possible to live in a city without a car and with kids and some percentage of people will chose to do that f

Again I don't understand your point. Obviously it's possible to live in a city without a car and with kids and some percentage of people will chose to do that for a variety of reasons. Nobody is disputing that. Both US and other counties have cities where you can live without a car and some people do that. If that's all you are claiming then sure I agree. My point is simply that the likelihood of someone wanting/needing a car goes up as they have kids. Are you telling me that the likelihood of a Parisian family moving out of the city and/or getting a car doesn't statistically increase with every incremental child? I'd find that hard to believe. I would also bet that there are very few Parisian families having 3+ kids while it's more likely outside of the city, same as in the US.