Wonder whether that's an instance of Berkson's paradox. Basically nobody bothering to report about Kebab shops that are neither good nor conveniently located.

Wonder whether that's an instance of Berkson's paradox. Basically nobody bothering to report about Kebab shops that are neither good nor conveniently located. Probably not, but "one quadrant empty" is a handy red flag that you might encounter Berkson's. https://en.wikipedia.org/wiki/Berkson%27s_paradox https://en.wikipedia.org/wiki/Berkson%27s_paradox