Are Parisian homes really 3 times more costly than Manhattan's?

Price per square foot not best apples-to-apples comparison

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My family is originally from Texas, although most branches have now lived in California for two or three generations. Those who remain in the Houston area aren’t shy about expressing their sentiment that despite the technically larger area of California, everything they care about is bigger (read: better) in Texas.

By that rationale, America has long been the Texas of global real estate, with our homes being built at larger sizes than new construction in other developed countries until Australia took that title a couple of years ago.